TOHOKU UNIVERSITY Researchers - Hiroyuki Nagahama

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Hiroyuki Nagahama

Section

Graduate School of Science

Job title

Professor

Degree

理学博士（東北大学）
理学修士（東北大学）

researchmap

https://researchmap.jp/read0011068

J-GLOBAL ID

200901083824972800

ORCID

https://orcid.org/0000-0001-9633-5179

Research History 7

2025/04 - Present

Tohoku University
2017/04 - Present

Tohoku University
2008/04 - Present

Tohoku University　Graduate School of Science
2017/04 - 2025/03

Tohoku University　Institute for Excellence in Higher Education
1994/10 - 2002/04

Tohoku University　Graduate School of Science
1997/04 - 1998/03

Polish Academy of Science (PAN)　Poland Science Academy, Institute of Geophysics
1991/04 - 1994/09

Shizuoka University

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Education 2

Tohoku University　Graduate School, Division of Natural Science　地質学

- 1990/03
Waseda University　Faculty of Education　理学

- 1985/03

Committee Memberships 13

Mathematical Reviews/MathSciNet Reviewer　MATHEMATICAL REVIEWS, American Mathematical Society

2024/04 - Present
青葉理学振興会　常任理事

2021/04 - Present
共通テスト宮城県地区連絡会議　議長

2017/04 - Present
The Institute of Geophysics, Polish Academy of Sciences　A Member of Advisory Board of Publications

2008/08 - Present
The Institute of Geophysics, Polish Academy of Sciences　Advisory Board of Publications

- Present
国立大学アドミッションセンター連絡会議会長　会長

2020/04 - 2024/05
青葉理学振興会　理事

2016/04 - 2020/03
萩友会　理事

2012/04 - 2017/03
申川鉱山タイトオイル環境対策評価検討会、経済産業省、関東東北産業保安監督部東北支部　申川鉱山タイトオイル環境対策評価検討会委員

2014/01 - 2016/06
申川鉱山タイトオイル環境対策評価検討会、経済産業省、関東東北産業保安監督部東北支部　申川鉱山タイトオイル環境対策評価検討会委員

2014/01 - 2016/06
日本地質学会　代議員

2012/04 - 2014/03
構造地質研究会（地質学会構造部会に移行）　編集委員

2004/04 - 2006/12
構造地質研究会（地質学会構造部会に移行）　編集委員

2004/04 - 2006/12

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Professional Memberships 5

惑星地質研究会
The Society for Science on Form, Japan
日本情報地質学会
日本応用地質学会
日本地質学会

Research Interests 11

Earth continuum mechanics
rock deformation
rheology
Structural geology
Finsler geometry
radon
Differential geometry
Chaos
Fractal
Cintinuum theory of dislocation
Seismo-electromagnetic Phenomena

Research Areas 2

Natural sciences / Mathematical physics and basic theory /
Natural sciences / Solid earth science /

Awards 11

第24回「環境放射能」研究会研究会奨励賞

2023/03　「環境放射能」研究会　ランダムフォレスト解析を用いた大気中ラドン濃度変動による地震の先行現象の検出
EMSEV award during EGU 2021

2021/05　EGU (Europe Geophysical Union)　Electromagnetic Studies of Earthquakes and Volcanoes
Best Paper Award

2016/11　Second International Conference on Science, Engineering & Environment (SEE-Osaka 2016), Osaka, Japan, November, 2016.　Concept of plasticity index to influence mechanical bifurcation of soils and soft-sediment deformation
Prof. Tsanyao Frank Yang Young Scientist Award

2016/10　International Geo-Hazard Research Symposium, Taipei, Taiwan　Daichi Iwata, Hiroyuki Nagahama, Jun Muto, Yumi Yasuoka, (2016) “Anomalous atmospheric radon concentration related to earthquakes: Anomaly detection by singular spectrum transformation” , 5th International Geo-Hazard Research Symposium, Taipei, Taiwan, Oc
平成23年度主任者部会年次大会 (第52回放射線管理研修会) 最優秀ポスター賞

2011/11/01　社団法人日本アイソトープ協会、放射線取扱主任者部会　RI排気モニターがとらえた東北地方太平洋沖地震前の大気中ラドン濃度変動
日本地質学会優秀ポスター賞

2010/09/20　日本地質学会　浮遊性有孔虫室房の３次元形態解析
沖縄大会かりゆし賞（優秀口頭発表賞）

2008/06/26　日本保健物理学会　歪む大地はラドンを吐き出すか？-兵庫県南部地震（1995.1.17）の場合-
日本地質学会第114年学術大会・優秀講演賞

2007/09/09　日本地質学会　地震前兆期における地殻のダメージ発展とラドン散逸
日本地質学会第112年学術大会・優秀講演賞

2005/09　日本地質学会　摩擦放電プラズマとフラクタル地震電磁放射
平成１６年度「東北大学総長教育賞」

2005/01/13　東北大学　「東北大学総長教育賞」
平成１６年度「東北大学全学教育貢献賞」

2004/10/25　東北大学　「東北大学全学教育貢献賞」

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Papers 380

Large contact aureole overprinting the Ryoke regional metamorphic zoning: Insights from the Takato–Komagane area, central Japan Peer-reviewed

Takuro Yoshioka, Hideo Takagi, Hiroyuki Nagahama, Tomoki Taguchi

Island Arc　accepted　2025/08
Jacobi stability and aperiodicity of Rikitake-Hide model based on KCC-theory Peer-reviewed

Mitsuhiro Hiranoa, Hiroyuki Nagahama, Takahiro Yajima

Chaos, Solitons and Fractals　199　((2025)116811)　2025/07/10

DOI： 10.1016/j.chaos.2025.116811 　
Some interface theories and Hall–Petch relationship Peer-reviewed

Yokoyama, H., Nagahama, H.

Royal Society Open Science　12　241954　2025/05/14

DOI： 10.1098/rsos.241954 　
Time evolution of dehydration-induced stick-slip behaviors of simulated bassanite gouges Peer-reviewed

M. Kawabata, R. Shiraishi, J. Muto, H. Nagahama, Y. Sasaki, M. Iwasaki

Geophysical Research Letter　52　e2025GL115114　2025/05/12

DOI： 10.1029/2025GL115114 　
オープンキャンパスの参加形態が志望決定に及ぼす影響 ――東北大学を例として―― Peer-reviewed

林如玉, 宮本友弘, 倉元直樹, 長濱裕幸

大学入試ジャーナル　(35)　31-38　2025/03

DOI： 10.57513/dncjournal.35.0_31 　
東北大学の入学者選抜における男女差の様相 ――選抜区分に着目して―― Peer-reviewed

宮本友弘, 林如玉, 久保沙織, 倉元直樹, 長濱裕幸

大学入試ジャーナル　(35)　7-14　2025/03

DOI： 10.57513/dncjournal.35.0_7 　
Practical cut-off value for radon concentration in indoor air using an activated-charcoal radon collector Peer-reviewed

Yumi Yasuoka, June Takemoto, Yasutaka Omori, Nanaho Kawamoto, Nao Goda, Hiroyuki Nagahama, Jun Muto, Shinji Tokonami, Masahiro Hosoda, Takeshi Iimoto, Takahiro Mukai

Radiation Protection Dosimetry　200　(16-18)　1701-1705　2024/11/13
Publisher: Oxford University Press (OUP)
DOI： 10.1093/rpd/ncae108 　

ISSN： 0144-8420

eISSN： 1742-3406

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Abstract The World Health Organization (WHO) recommends that countries adopt the reference level of 100 Bq m−3 for indoor radon gas. Adopting the reference level requires a preliminary assessment of the indoor radon concentration. In the preliminary investigation, a cut-off value is useful, which is a value for selecting samples that can be reliably determined to be below the reference level (in this paper, the WHO reference level) using a straightforward method. If the true value was the WHO reference level, then the cut-off value of the PicoRad collector for selecting samples was determined as 80 Bq m−3 through the analysis of the 95% prediction interval.
Memory of fracture in information geometry Peer-reviewed

Mitsuhiro Hirano, Hiroyuki Nagahama

Chaos, Solitons & Fractals　189　(part 1)　115608　2024/10/11

DOI： 10.1016/j.chaos.2024.115608 　
Detection of atmospheric radon concentration anomalies and their potential for earthquake prediction using Random Forest analysis Peer-reviewed

Mayu Tsuchiya, Hiroyuki Nagahama, Jun Muto, Mitsuhiro Hirano, Yumi Yasuoka

Scientific Reports　14　11626　2024/05/31

DOI： 10.1038/s41598-024-61887-6 　
Generalization of KCC-theory to fractional dynamical systems and application to viscoelastic oscillations Invited Peer-reviewed

Takahiro Yajima, Takuya Sakurada, Hiroyuki Nagahama

Physica D: Nonlinear Phenomena　134193-134193　2024/05
Publisher: Elsevier BV
DOI： 10.1016/j.physd.2024.134193 　

ISSN： 0167-2789
Corrigendum to " Informative fractal dimension associated with nonmetricity in information geometry" [Physca A 625 (2023) 12907] Peer-reviewed

Mitsihiro Hirano, Hiroyuki Nagahama

Physica A　639　129652　2024/03

DOI： 10.1016/j.physa.2023.129017 　
Implementation and Evaluation of Admissions Information Sessions for High School Educators : Analysis of Face-to-face and Online Characteristics Peer-reviewed

LIN Ruyu, MIYAMOTO Tomohiro, KUBO Saori, KURAMOTO Naoki, NAGAHAMA Hiroyuki

BULLETIN OF THE INSTITUTE FOR EXCELLENCE IN HIGHER EDUCATION TOHOKU UNIVERSITY　(10)　77-87　2024/03
1995年兵庫県南部地震直前における大気中ラドン濃度変動と気温の解析 Peer-reviewed

西尾友克, 安岡由美, 長濱裕幸, 平野光浩, 武藤潤, 向高弘

第24回「環境放射能」研究会 Proceedings　98-103　2023/12/07
活性炭捕集器による屋内ラドン濃度のスクリーニング測定 Peer-reviewed

川本奈々帆, 齋藤華子, 武本樹音, 合田奈央, 安岡由美, 長濱裕幸, 武藤潤, 床次眞司, 細田正洋, 大森康孝, 飯本武志, 向高弘

第24回「環境放射能」研究会 Proceedings　93-97　2023/12/07
排気モニタによる大気中ラドン濃度の測定 Peer-reviewed

栗山あかね, 樋口舞, 西村夏樹, 森花恵, 安岡由美, 長濱裕幸, 武藤潤, 細田正洋, 床次眞司, 大森康孝, 飯本武志, 向高弘

第24回「環境放射能」研究会 Proceedings　87-92　2023/12/07
Detecting earthquake precursor phenomena in atmospheric radon concentration fluctuations using Random Forest analysis (Random Forest解析による大気中ラドン濃度変動における地震先行現象の検知) Peer-reviewed

Mayu Tsuchiya, Hiroyuki Nagahama, Jun Muto, Mitsuhiro Hirano, Yumi Yasuoka

Proceedings of the 24th Workshop on Environmental Radioactivity, KEK, Tsukuba, Japan March 608, 2023 (eds., Kotaro Bessho, Hiroshi Matsumura and Go Yoshida　104-109　2023/12/07
Empirical analysis for the development of a public relations strategy: a regional comparison of successful applicants to Tohoku University Peer-reviewed

Ruyu LIN, Tomohiro MIYAMOTO, Saori KUBO, Naoki T. KURAMOTO, Hiroyuki NAGAHAMA

Educational Informatics Research　(22)　55-63　2023/12
Current location of the "Admissions Center" at a national university: Results of the 20th anniversary project of the Japan Association of the National University Admission Center Peer-reviewed

Naoki T. KURAMOTO, Fumihito IKEDA, Junichi NAGATA, Saori KUBO, Tomohiro MIYAMOTO, Dai NISHIGORI, Masaoki TAKEUCHI, Hiroyuki NAGAHAMA

Educational Informatics Research　(22)　65-81　2023/12
東北大学の一般選抜におけるチェックリストを活用した主体性評価の実施結果について Peer-reviewed

宮本友弘, 久保沙織, 倉元直樹, 長濱裕幸

大学入試ジャーナル　(34)　205-210　2023/12
Physically meaningful parameters of viscoelastic models based on the general functional form of the transfer functions Peer-reviewed

Makoto Suda, Hiroyuki Nagahama

Physica Scripta　98　105255-105255　2023/09/29
Publisher: IOP Publishing
DOI： 10.1088/1402-4896/acf88f 　

ISSN： 0031-8949

eISSN： 1402-4896

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Abstract Viscoelastic models aim to characterize material properties by extracting the parameters that best describe observed deformations. However, due to the equivalence of various model structures, the conventional model parameters as constants assigned to each model element cannot be uniquely determined for a given deformation and, therefore, are unfit to represent material properties. To resolve this problem, we formulate the framework of viscoelastic models based on their transfer functions. We explicitly derive the functional form of the transfer functions of viscoelastic models and show that a set of parameters is uniquely determined for each equivalent set of viscoelastic models. The newly identified parameters correspond to the instantaneous modulus and the distribution of the characteristic time scales of the system. Based on this perspective, we show that the differentiation order of a fractional viscoelastic element, spring-pot, is determined solely by the recursive nature of the characteristic time scales of the system. Additionally, we show that all viscoelastic models are equivalent to four canonic model structures.
Geometric structures of micropolar continuum with elastic and plastic deformations based on generalized Finsler space Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

Mathematics and Mechanics of Solids　29　(2)　327-348　2023/09/20
Publisher: SAGE Publications
DOI： 10.1177/10812865231188329 　

ISSN： 1081-2865

eISSN： 1741-3028

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Elasto-plastic deformations of micropolar continuum are discussed by a non-Riemannian geometry. The non-locality of micropolar continuum is described in a second-order vector bundle of displacements and microrotations. With a decomposition of total elasto-plastic field, geometric quantities are divided into the elastic and plastic components independently. Especially, when an intrinsic parallelism of displacements and microrotations holds, integrability conditions of the elasto-plastic field are represented by a torsion tensor or the curvature of nonlinear connection. Then, Burgers and Frank vectors and an energy release rate around crack tips are related to the torsion tensor or the curvature of nonlinear connection. Moreover, the non-locality of microrotation is discussed based on a kink band as a disclination. It is found a generalized expression of Burgers vector which can describe the kink interface including the disclination.
A new split Hopkinson pressure bar for experimental investigation of dynamic pulverization under very high strain rates Peer-reviewed

Eranga Gayanath Jayawickrama, Takuma Sekiguchi, Jun Muto, Sando Sawa, Hiroyuki Nagahama, Yoshio Kono, Kyung-Oh Bae, Hyung-Seop Shin

Review of Scientific Instruments　94　(9)　095110-095110　2023/09
Publisher: AIP Publishing
DOI： 10.1063/5.0151448 　

ISSN： 0034-6748

eISSN： 1089-7623

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Off-fault damage or pulverized rocks found in large-scale strike–slip faults are of great interest in earthquake research. In order to experimentally investigate rock pulverization, we developed a split Hopkinson pressure bar with compact dimensions and high-speed imaging. The developed experimental setup is capable of generating very high strain rates up to 1320 s−1 with the satisfaction of stress equilibrium, which are essential to reproduce the dynamic pulverization observed in nature and obtain dynamic stress–strain responses accurately. High-speed imaging revealed that cracks initiate and propagate along the grain boundaries at very high speeds, while the dynamic stress–strain response suggested that energy dissipated into the fracture increases with stronger impacts. In addition, we show that the apparatus is capable of producing particle size distributions partly similar to those in naturally pulverized rocks of large-scale strike–slip faults. Thus, our developed system with compact dimensions opens new ways to understand the dynamics of the rock pulverization in off-fault regions of large-scale strike–slip faults.
Informative fractal dimension associated with nonmetricity in information geometry Peer-reviewed

Mitsuhiro Hirano, Hiroyuki Nagahama

Physica A: Statistical Mechanics and its Applications　625　129017-129017　2023/09
Publisher: Elsevier BV
DOI： 10.1016/j.physa.2023.129017 　

ISSN： 0378-4371
Modeling of olivine-spinel phase transformation of germanate olivine (Mg2GeO4) by using the phase-field method Peer-reviewed

Sando Sawa, Jun Muto, Hiroyuki Nagahama

Physics of the Earth and Planetary Interiors　341　107060-107060　2023/06/29
Publisher: Elsevier BV
DOI： 10.1016/j.pepi.2023.107060 　

ISSN： 0031-9201
Effects of the Online Open campus on Motivation for Applying for the Tohoku University: From the Questionnaire for Freshman Peer-reviewed

(9)　111-117　2023/03
Issues in Online and Face-to-Face Hybrid admission Publicity: Focusing on Activities in 2022 Peer-reviewed

(9)　99-110　2023/03
東北大学保健学科における総合型選抜の評価ー看護学専攻の「AO入試Ⅱ期」についてー Peer-reviewed

宮本友弘, 久保沙織, 尾崎章子, 宮下光令, 倉元直樹, 長濱裕幸

大学入試研究ジャーナル　(33)　94-99　2023/03
新学習指導要領の下での大学入試ー高校調査から見えてきた課題ー Peer-reviewed

倉元直樹, 宮本友弘, 久保沙織, 長濱裕幸

大学入試研究ジャーナル　(33)　26-32　2023/03
Hodge duality between stress space and strain space in anisotropic media Peer-reviewed

Yajima, T, Nagahama H

Zeitschrift für Angewandte Mathematik und Mechanik　2022; e202100244　2022/10/01

DOI： 10.1002/zamm.202100244 　
Nonmetricity on Riemann-Cartan-Weyl Manifold: its Physical and Mathematical Meaning and Application Peer-reviewed

Mitsuhiro Hirano, Hiroyuki Nagahama

International Journal of Geometric Methods in Modern Physics　(2022)　2250153 (19 pages)　2022/05/27
Publisher: World Scientific Pub Co Pte Ltd
DOI： 10.1142/s0219887822501535 　

ISSN： 0219-8878

eISSN： 1793-6977
The quantitative characterization of hydraulic fracture connectivity from a postmortem investigation Peer-reviewed

Eranga G Jayawickrama, Jun Muto, Osamu Sasaki, Hiroyuki Nagahama

Journal of Geophysics and Engineering　19　(2)　211-226　2022/04/05
Publisher: Oxford University Press (OUP)
DOI： 10.1093/jge/gxac012 　

ISSN： 1742-2132

eISSN： 1742-2140

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Abstract Two bio-siliceous Onnagawa (ONG I and ONG II) shale samples have been hydraulically fractured under two constant differential stresses (60 and 85 MPa, respectively) to investigate the fracture network's connectivity evolution by a postmortem analysis. The pressure inside the drilled borehole in a cylindrical core sample is increased above the confining pressure (10 MPa) until failure by hydraulic fracture. The two samples failed at two different borehole pressures (ONG I: 42 MPa, ONG II: 16 MPa). Fractured samples were scanned in an industrial X-ray CT machine and the tomographic images of the fracture network were extracted for a postmortem investigation. From the fracture volume segments, obtained by thresholding the frequency distribution of the fracture network's voxel values, a quantitative estimation of fracture connectivity was carried out. The connectivity was quantified based on the relative entropy of size distribution of fractures (${H_r}$), a method adapted from information theory. Fracture connectivity estimation shows that ${H_r}$ is at a maximum value when the fractures show a significant distribution with very limited connectivity. The value of ${H_r}$ is at a minimum and close to 0 when a well-linked fracture network is formed. In both samples, this minimum was attained at the threshold of 43k indicating the highest connectivity and the best representation of the fracture network. The extracted fracture network of ONG I showed a multi-winged hydraulic fracture network while a planar conventional two-winged hydraulic fracture network had been generated in ONG II with a lower fracture volume.
Estimation of surface charge densities supporting seismo-electromagnetic phenomena through the surface charging mechanism Peer-reviewed

Kiriha Tanaka, Hiroyuki Nagahama, Jun Muto, Toshitaka Oka, Yasuo Yabe

Physics and Chemistry of the Earth, Parts A/B/C　103137-103137　2022/03/15
Publisher: Elsevier BV
DOI： 10.1016/j.pce.2022.103137 　

ISSN： 1474-7065
Enhancement of ductile deformation in polycrystalline anorthite due to the addition of water Peer-reviewed

Junichi Fukuda, Jun Muto, Sanae Koizumi, Sando Sawa, Hiroyuki Nagahama

Journal of Structural Geology　156　104547-104547　2022/03
Publisher: Elsevier BV
DOI： 10.1016/j.jsg.2022.104547 　

ISSN： 0191-8141
COVID-19蔓延下における個別大学の入試に関する高校側の意見 Peer-reviewed

倉元直樹, 宮本友弘, 長濱裕幸

大学入試研究ジャーナル　(32)　1-8　2022/03
東北大学志望を促進する要因の検討ー新入学者アンケートから― Peer-reviewed

宮本友弘, 久保沙織, 倉元直樹, 長濱裕幸

大学入試研究ジャーナル　(32)　69-76　2022/03
Change in Streaming Potential with Earthquakes

Naoto Kaneko, Hiroyuki Nagahama, Kan Okubo, Michiyo Nakashima

M. Meghraoui et al. (eds.), Advances in Geophysics, Tectonics and Petroleum Geosciences, Advances in Science, Technology & Innovation　329-331　2022
Publisher: Springer International Publishing
DOI： 10.1007/978-3-030-73026-0_76 　

ISSN： 2522-8714

eISSN： 2522-8722
Damage Evolution of Onnagawa Shale by Postmortem Thresholding of X‐Ray Computed Tomography Peer-reviewed

E. G. Jayawickrama, J. Muto, O. Sasaki, H. Nagahama

Journal of Geophysical Research: Solid Earth　126　(11)　e2021JB022056　2021/11
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2021jb022056 　

ISSN： 2169-9313

eISSN： 2169-9356
Strain-induced partial serpentinization of germanate olivine with a small amount of water Peer-reviewed

Sando Sawa, Nobuyoshi Miyajima, Jun Muto, Hiroyuki Nagahama

American Mineralogist　106　(11)　1789-1796　2021/11/01
Publisher: Mineralogical Society of America
DOI： 10.2138/am-2021-7735 　

ISSN： 0003-004X

eISSN： 1945-3027
Short‐wavelength Bouguer gravity anomaly and active fault distribution in the northeastern Japan arc Peer-reviewed

Mitsuhiro Hirano, Hiroyuki Nagahama, Jun Muto

Terra Nova　2021;00:1–7.　1-7　2021/09/17
Publisher: Wiley
DOI： 10.1111/ter.12560 　

ISSN： 0954-4879

eISSN： 1365-3121
Car-borne survey for a black shale area and influence of snowfall on absorbed dose rate in air of a coastal area Peer-reviewed

Yuki Tamakuma, Masahiro Hosoda, Yasutaka Omori, Hiroyuki Nagahama, Tetsuo Ishikawa, Michikuni Shimo, Shinji Tokonami

Radiation Environment and Medicine　10　(2)　96-101　2021/09
Strain localization bands in fine-grained aggregates of germanate olivine and pyroxene deformed by a Griggs type apparatus Peer-reviewed

Sando Sawa, Jun Muto, Nobuyoshi Miyajima, Rei Shiraishi, Masanori Kido, Hiroyuki Nagahama

International Journal of Rock Mechanics and Mining Sciences　144　104812-104812　2021/08
Publisher: Elsevier BV
DOI： 10.1016/j.ijrmms.2021.104812 　

ISSN： 1365-1609
Effect of fracture on ESR intensity using a low-velocity rotary shear apparatus Peer-reviewed

Kiriha Tanaka, Jun Muto, Yasuo Yabe, Toshitaka Oka, Hiroyuki Nagahama

Geochronometria　https://content.sciendo.com/view/journals/geochr/geochr-overview.xml　2021/05/29
Rectifying characteristics of semiconductor minerals: A model on seismo-electromagnetic radiation mechanism from ore bodies Peer-reviewed

Naoto Kaneko, Mitsuyuki Ozawa, Jun Muto, Hiroyuki Nagahama, Toshiro Nagase

Physics of the Earth and Planetary Interiors　315　106694　2021/04/27
Preseismic atmospheric radon anomaly associated with 2018 Northern Osaka earthquake Peer-reviewed

Jun Muto, Yumi Yasuoka, Nao Miura, Daichi Iwata, Hiroyuki Nagahama, Mitsuhiro Hirano, Yoshiro Ohmomo, Takahiro Mukai

Scientific Reports　11　(1)　7451　2021/04/02
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-021-86777-z 　

eISSN： 2045-2322

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<title>Abstract</title>Despite the challenges in identifying earthquake precursors in intraplate (inland) earthquakes, various hydrological and geochemical measurements have been conducted to establish a possible link to seismic activities. Anomalous increases in radon (²²²Rn) concentration in soil, groundwater, and atmosphere have been reported prior to large earthquakes. Although the radon concentration in the atmosphere is lower than that in groundwater and soils, a recent statistical analysis has suggested that the average atmospheric concentration over a relatively wide area reflects crustal deformation. However, no study has sought to determine the underlying physico-chemical relationships between crustal deformation and anomalous atmospheric radon concentrations. Here, we show a significant decrease in the atmospheric radon concentration temporally linked to the seismic quiescence before the 2018 Northern Osaka earthquake occurring at a hidden fault with complex rupture dynamics. During seismic quiescence, deep-seated sedimentary layers in Osaka Basin, which might be the main sources of radon, become less damaged and fractured. The reduction in damage leads to a decrease in radon exhalation to the atmosphere near the fault, causing the preseismic radon decrease in the atmosphere. Herein, we highlight the necessity of continuous monitoring of the atmospheric radon concentration, combined with statistical anomaly detection method, to evaluate future seismic risks.
大学入試英語問題における設問形式による識別力比較 ―英文和訳・和文英訳は識別力の低い問題形式か― Peer-reviewed

秦野進一, 倉元直樹, 長濱裕幸

大学入試研究ジャーナル　(31)　140-145　2021/03
東北大学における一般入試前期日程志願者の学力水準の経年分析―過去3年間の大学入試センター試験成績から― Peer-reviewed

宮本友弘, 倉元直樹, 長濱裕幸

大学入試研究ジャーナル　(31)　134-139　2021/03
Radon degassing triggered by tidal loading before an earthquake Peer-reviewed

Yasutaka Omori, Hiroyuki Nagahama, Yumi Yasuoka, Jun Muto

Scientific Reports　11　4092　2021/02/18
電子スピン共鳴（ESR）法を用いた断層年代推定法 Peer-reviewed

田中桐葉, 武藤潤, 長濱裕幸, 岡壽崇

放射線化学　(110)　21-30　2020/11
Connection Structures of Topological Singularity in Micromechanics from a Viewpoint of Generalized Finsler Space Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

Annalen der Physik　2000306-2000306　2020/10/02
Publisher: Wiley
DOI： 10.1002/andp.202000306 　

ISSN： 0003-3804

eISSN： 1521-3889
High school opinion on the articulation reform policy and its change: From the view point of The Principle of Prospective Student Protection Peer-reviewed

japanese Journal for Research on Testing　16　2020/06
Paleomagnetic dating of wave-emplaced boulders Peer-reviewed

Tetsuro Sato, Norihiro Nakamura, Kazuhisa Goto, Masaki Yamada, Yuho Kumagai, Hiroyuki Nagahama, Koji Minoura

Geological Records of Tsunamis and Other Extreme Waves　777-793　2020
Publisher: Elsevier
DOI： 10.1016/b978-0-12-815686-5.00036-5 　
EVALUATION OF A RADON AIR MONITOR IN THE MEASUREMENT OF RADON CONCENTRATION IN WATER IN COMPARISON WITH A LIQUID SCINTILLATION COUNTER Peer-reviewed

Shoko Higuchi, Yuuki Kamishiro, Maki Ishihara, Yumi Yasuoka, Yasunori Mori, Masahiro Hosoda, Kazuki Iwaoka, Shinji Tokonami, Rikiya Takahashi, Miroslaw Janik, Jun Muto, Hiroyuki Nagahama, Takahiro Mukai

Radiation Protection Dosimetry　184　(3-4)　426-429　2019/10/01
Publisher: Oxford University Press (OUP)
DOI： 10.1093/rpd/ncz070 　

ISSN： 0144-8420

eISSN： 1742-3406

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<title>Abstract</title> The World Health Organisation (WHO) recommends that the concentration of radon in water should be no more than 100 kBq m−3 (100 BqL−1) and the Codex Alimentarius Commission states that the limit of quantification (LOQ) of a method should be no more than one-fifth of this value. In this study, a degassing method with an RAD7 device was used to measure radon concentrations in water, compared to a liquid scintillation counter (LSC) method used as the reference, to investigate whether the numerical value of the LOQ of this method was more than 1/5 (20 kBq m–3) of 100 kBq m–3. The degassing method with leak prevention was shown to reach a target value of 20 kBq m−3 or less under a relative humidity of 6% or lower in the chamber of the RAD7 device. Accordingly, the RAD7 degassing method with leak prevention can be used to accurately measure radon concentrations in water within the guidance level set out by the WHO.
高大接続改革への対応に関する高校側の意見—東北大学のAO入試を事例として— Peer-reviewed

倉元直樹, 宮本友弘, 長濱裕幸

日本テスト学会誌　(15)　99-119　2019/06
Dating of tsunami boulders from Ishigaki Island, Japan, with a modified viscous remanent magnetization approach Peer-reviewed

Sato T, Nakamura N, Goto, K, Kumagai, Y, Nagahama, H, Minoura K, Zhao X, Heslop D, Roberts A. P

Earth and Planetary Science Letters　520　94-104　2019/05

DOI： 10.1016/j.epsl.2019.05.028. 　
Pressure dependence of elastic deformation at multiple contacts and estimation of contact state of thin cracks Peer-reviewed

Eranga Gayanath Jayawickrama, Hayata Tamai, Jun Muto, Hiroyuki Nagahama

GEOPHYSICS　84　(4)　WA153-WA160　2019/05

DOI： 10.1190/GEO2018-0501.1 　

ISSN： 0016-8033

eISSN： 1942-2156
Derivation and validity evaluation of calibration factors for activated-charcoal radon collectors Peer-reviewed

Wakabayashi, A, Yasuoka, Y, Janik, M, Nagahama, H, Fukuhori, N, Mori, Y, Arai, Y, Fujii, S, Mukai, T

RADIOISOTOPES　68　(5)　317-329　2019/04
Publisher: Japan Radioisotope Association
DOI： 10.3769/radioisotopes.68.317 　

ISSN： 0033-8303

eISSN： 1884-4111
Normal stress dependency of ESR characteristic in quartz gouge by fault frictional sliding at shallow depth

Tanaka Kiriha, Muto Jun, Yabe Yasuo, Oka Toshitaka, Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　2019　503　2019
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2019.0_503 　

ISSN： 1348-3935

eISSN： 2187-6665
Development of quartz ribbons in felsic granulites under strong coaxial deformation in the Highland Complex of Sri Lanka. Peer-reviewed

Bhathiya Athurupana, Jun Muto, Hiroyuki Nagahama

The Structural Geology Contribution to the Africa-Eurasia Geology: Basement and Reservoir Structure, Ore Mineralisation and Tectonic Modeling　2019/01

DOI： 10.1007/978-3-030-01455-1_8 　
Thermodynamic consideration on volcanic landforms Peer-reviewed

Naoto Kaneko, Hiroyuki Nagahama

Proceedings of the 1st Springer Conference of the Arabian Journal of Geosciences (CAJG-1), Tunisia 2018: Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas　285-288　2019

DOI： 10.1007/978-3-030-01452-0_68 　
Strain localization and fabric development in polycrystalline anorthite + melt by water diffusion in an axial deformation experiment Peer-reviewed

Jun-ichi Fukuda, Jun Muto, Hiroyuki Nagahama

Earth, Planets and Space　70　(1)　1-15　2018/12/01
Publisher: Springer Berlin Heidelberg
DOI： 10.1186/s40623-017-0776-2 　

ISSN： 1880-5981 1343-8832

eISSN： 1880-5981
Non-parametric detection of atmospheric radon concentration anomalies related to earthquakes Peer-reviewed

Daichi Iwata, Hiroyuki Nagahama, Jun Muto, Yumi Yasuoka

Scientific Reports　8:13028　(1)　2018/08

DOI： 10.1038/s41598-018-31341-5 　

eISSN： 2045-2322
Non-holonomic geometric structures of rigid body system in Riemann-Cartan space Peer-reviewed

Takahiro Yajima, Kazuhito Yamasaki, Hiroyuki Nagahama

Journal of Physics Communications　2 (085008)　1-9　2018/08

DOI： 10.1088/2399-6528/aad600 　
Geometric Structures of Fractional Dynamical Systems in Non-Riemannian Space: Applications to Mechanical and Electromechanical Systems Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

Annalen der Physik　530　(5)　1-9　2018/05/01
Publisher: Wiley-VCH Verlag
DOI： 10.1002/andp.201700391 　

ISSN： 1521-3889 0003-3804
Kondo theory for spherical shell tectonics Peer-reviewed

Kazuhei Kikuchi, Hiroyuki Nagahama

International Journal of GEOMATE　14　(45)　99-102　2018
Publisher: GEOMATE International Society
DOI： 10.21660/2018.45.7314 　

ISSN： 2186-2982
Accurate Measurement of Indoor Radon Concentration using a Low-Effective Volume Radon Monitor Peer-reviewed

Aya Tanaka, Nodoka Minami, Yumi Yasuoka, Takeshi Iimoto, Yasutaka Omori, Hiroyuki Nagahama, Jun Muto, Takahiro Mukai

RADIATION PROTECTION DOSIMETRY　177　(3)　324-330　2017/12

DOI： 10.1093/rpd/ncx050 　

ISSN： 0144-8420

eISSN： 1742-3406
バブリング法による水中ラドン濃度測定について Peer-reviewed

神代悠希, 石原万己, 藤井さとみ, 安岡由美, 細田正洋, 岩岡和輝, 床次眞司, Miroslaw Janik, 武藤潤, 長濱裕幸, 向高弘

高エネルギー加速器研究機構(KEK) 2017, Proceeding of the 18th Workshop on Environmental Radioactivity 2017　333-338　2017/11
活性炭型ラドン検出器による屋内ラドン濃度測定の検討 Peer-reviewed

藤井さとみ, 新井友里愛, 安岡由美, 飯本武志, 床次眞司, Miroslaw Janik, 長濱裕幸, 武藤潤, 向高弘

第67回日本薬学会近畿支部大会　2017/10/14
Plasticity index effects on mechanical Bifurcation: Soils and soft-sediment deformation Peer-reviewed

Naoto Kaneko, Jun Muto, Hiroyuki Nagahama

International Journal of GEOMATE　13　(36)　19-25　2017/08/01
Publisher: GEOMATE International Society
DOI： 10.21660/2017.36.2755 　

ISSN： 2186-2982
SHEAR ZONE DEVELOPMENT AND FRICTIONAL INSTABILITY OF FAULT GOUGE Peer-reviewed

Momoko Hirata, Jun Muto, Hiroyuki Nagahama

International Journal of GEOMATE　12　(34)　32-37　2017/06

ISSN： 2186-2990
ANOMALOUS CHANGES IN ATMOSPHERIC RADON CONCENTRATION BEFORE AND AFTER THE 2011 NORTHERN WAKAYAMA EARTHQUAKE (MJ 5.5) Peer-reviewed

Mikako Goto, Yumi Yasuoka, Hiroyuki Nagahama, Jun Muto, Yasutaka Omori, Hayato Ihara, Takahiro Mukai

RADIATION PROTECTION DOSIMETRY　174　(3)　412-418　2017/04

DOI： 10.1093/rpd/ncw142 　

ISSN： 0144-8420

eISSN： 1742-3406
Generation of billow-like wavy folds by fluidization at high temperature in Nojima fault gouge: microscopic and rock magnetic perspectives Peer-reviewed

Fukuzawa, T, Nakamura, N, Oda, H, Uehara, M, Nagahama, H

Earth, Planets and Space　69　54　2017/03
Self-affinities of Folds and Incomplete Similarity Peer-reviewed

Kazuhei Kikuchi, Hiroyuki Nagahama

GSTF Journal of Geological Sciences, Global Science and Technology Forum　3　(1)　5-8　2017

DOI： 10.5176/2335-6774 　
Finsler geometry of topological singularities for multi-valued fields: Applications to continuum theory of defects Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

ANNALEN DER PHYSIK　528　(11-12)　845-851　2016/12

DOI： 10.1002/andp.201600172 　

ISSN： 0003-3804

eISSN： 1521-3889
CLARIFICATION OF SHEAR ZONE DEVELOPMENT IN A GOUGE LAYER RELATED TO SLIP INSTABILITY Peer-reviewed

Momoko Hirata, Jun Muto, Hiroyuki Nagahama

Proceedings of Second International Conference on Science, Engineering & Environment (SEE-Osaka 2016), Osaka, Japan, November 21st-23rd, 2016　2　108-112　2016/11/22
Stretched exponential relaxation of viscous remanence and magnetic dating of erratic boulders Peer-reviewed

T. Sato, N. Nakamura, H. Nagahama, K. Minoura

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH　121　(11)　7707-7715　2016/11

DOI： 10.1002/2016JB013281 　

ISSN： 2169-9313

eISSN： 2169-9356
Concept of plasticity index to influence mechanical bifurcation of soils and soft-sediment deformation Peer-reviewed

Naoto Kaneko, Jun Muto, Hiroyuki Nagahama

Proceedings of Second International Conference on Science, Engineering & Environment (SEE-Osaka 2016), Osaka, Japan, November 21st-23rd, 2016　2　173-179　2016/11
Self-affinities of Folds and Incomplete Similarity Peer-reviewed

Kazuhei Kikuchi, Hiroyuki Nagahama

Proceedings of Annual International Conference on Geological and Earth Sciences 2016, Singapore, October 10, 2016　53-55　2016/10/10

DOI： 10.5176/2251-3353_GEOS16.29. 　
Method for correction of differential stress calculations from experiments using the solid salt assembly in a Griggs-type deformation apparatus Peer-reviewed

Masanori Kido, Jun Muto, Hiroyuki Nagahama

TECTONOPHYSICS　672　170-176　2016/03

DOI： 10.1016/j.tecto.2016.02.011 　

ISSN： 0040-1951

eISSN： 1879-3266
Radon as an Indicator of Nocturnal Atmospheric Stability: A Simplified Theoretical Approach Peer-reviewed

Yasutaka Omori, Hiroyuki Nagahama

BOUNDARY-LAYER METEOROLOGY　158　(2)　351-359　2016/02

DOI： 10.1007/s10546-015-0089-6 　

ISSN： 0006-8314

eISSN： 1573-1472
Theory of consolidation and precursory time of earthquakes Peer-reviewed

Naoto Kaneko, Hiroyuki Nagahama

International Organization of Scientific Research Journal of Mechanical and Civil Engineering (IOSR-JMCE)　13　(4)　44-46　2016

DOI： 10.9790/1684-1304054446 　
地震発生先行過程に伴うラドン放出と地殻変形

長濱裕幸, 武藤潤

「地震に先行する大気中ラドン濃度変動に関する観測, 「災害の軽減に貢献するための地震火山観測研究計画の推進について成果」報告書　2016
The Energetic Assessment of Frictional Instability Based on Rowe's Theory Peer-reviewed

Hirata, M, Muto, J, Nagahama, H

AGU 2015 Fall Meetings　2015/12
Finsler geometry for nonlinear path of fluids flow through inhomogeneous media Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS　25　1-8　2015/10

DOI： 10.1016/j.nonrwa.2015.02.009 　

ISSN： 1468-1218
Annual variation in the atmospheric radon concentration in Japan Peer-reviewed

Yuka Kobayashi, Yumi Yasuoka, Yasutaka Omori, Hiroyuki Nagahama, Tetsuya Sanada, Jun Muto, Toshiyuki Suzuki, Yoshimi Homma, Hayato Ihara, Kazuhito Kubota, Takahiro Mukai

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY　146　110-118　2015/08

DOI： 10.1016/j.jenvrad.2015.04.007 　

ISSN： 0265-931X

eISSN： 1879-1700
Calibration for stress measurement of Griggs-type high temperature and high pressure deformation apparatus Peer-reviewed

Kido M, Muto J, Nagahama H

Japan Geoscience Union Meeting　2015/05/27
Fractal particle size distribution of pulverized fault rocks as a function of distance from the fault core Peer-reviewed

Jun Muto, Tsurugi Nakatani, Osamu Nishikawa, Hiroyuki Nagahama

GEOPHYSICAL RESEARCH LETTERS　42　(10)　3811-3819　2015/05

DOI： 10.1002/2015GL064026 　

ISSN： 0094-8276

eISSN： 1944-8007
Batdorf parameter for the spherical shells tectonics Peer-reviewed

Kikuchi, K, Nagahama, H

European Geosciences Union General Assembly 2015　EGU2015-10638　2015/04
Theory of non-holonomic subspaces (Contact tensor analysis)

Nagahama Hiroyuki, Kikuchi Kazuhei

Annual Meeting of the Geological Society of Japan　2015　207-207　2015
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2015.0_207 　
Normal seasonal variations for atmospheric radon concentration: a sinusoidal model Peer-reviewed

Koseki Hayashi, Yumi Yasuoka, Hiroyuki Nagahama, Jun Muto, Tetsuo Ishikawa, Yasutaka Omori, Toshiyuki Suzuki, Yoshimi Homma, Takahiro Mukai

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY　139　149-153　2015/01

DOI： 10.1016/j.jenvrad.2014.10.007 　

ISSN： 0265-931X

eISSN： 1879-1700
地震発生先行過程に伴うラドン放出と地殻変形

長濱裕幸, 武藤潤

「地震に先行する大気中ラドン濃度変動に関する観測, 「災害の軽減に貢献するための地震火山観測研究計画の推進について成果」報告書　2015
Self-affinities analysis of fault-related folding Peer-reviewed

Kazuhei Kikuchi, Kazutoshi Abiko, Hiroyuki Nagahama, Jun Muto

EPISODES　37　(4)　308-311　2014/12

ISSN： 0705-3797
Experimental analysis on Rowe's stress-dilatancy relation and frictional instability of fault gouges Peer-reviewed

Momoko Hirata, Jun Muto, Hiroyuki Nagahama

EPISODES　37　(4)　303-307　2014/12

ISSN： 0705-3797
Paleomagnetism reveals the emplacement age of tsunamigenic coral boulders on Ishigaki Island, Japan Peer-reviewed

T. Sato, N. Nakamura, K. Goto, Y. Kumagai, H. Nagahama, K. Minoura

GEOLOGY　42　(7)　603-606　2014/07

DOI： 10.1130/G35366.1 　

ISSN： 0091-7613

eISSN： 1943-2682
地震発生先行過程に伴うラドン放出と地殻変形

長濱裕幸, 武藤潤

「地震に先行する大気中ラドン濃度変動に関する観測, 「災害の軽減に貢献するための地震火山観測研究計画の推進について成果」報告書　2014
Geometry of stress function surfaces for an asymmetric continuum Invited Peer-reviewed

Takahiro Yajima, Kazuhito Yamasaki, Hiroyuki Nagahama

ACTA GEOPHYSICA　61　(6)　1703-1721　2013/12

DOI： 10.2478/s11600-013-0142-0 　

ISSN： 1895-6572
Fractional-order derivative and time-dependent viscoelastic behaviour of rocks and minerals Invited Peer-reviewed

Yusuke Kawada, Takahiro Yajima, Hiroyuki Nagahama

Acta Geophysica　61　(6)　1690-1702　2013/12

DOI： 10.2478/s11600-013-0153-x 　

ISSN： 1895-6572 1895-7455
Self-affinities of landforms and folds in the Northeast Honshu Arc, Japan Invited Peer-reviewed

Kazuhei Kikuchi, Kazutoshi Abiko, Hiroyuki Nagahama, Hiroshi Kitazato, Jun Muto

ACTA GEOPHYSICA　61　(6)　1642-1658　2013/12

DOI： 10.2478/s11600-013-0151-z 　

ISSN： 1895-6572
Electromagnetic radiations from semiconductor minerals Peer-reviewed

Mitsuyuki Ozawa, Jun Muto, Hiroyuki Nagahama, Toshiro Nagase

Proc. of 2nd G-EVER Symposium　160-163　2013/10/19
Experimental analysis on Rowe's stress-dilatancy relation and frictional instability of fault gouges Peer-reviewed

Momoko Hirata, Jun Muto, Hiroyuki Nagahama, Kenshiro Otsuki

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards Sendai, Japan, 19-20 Oct 2013　140-143　2013/10/19
Electromagnetic radiations from semiconductor minerals Peer-reviewed

Mitsuyuki Ozawa, Jun Muto, Hiroyuki Nagahama, Toshiro Nagase

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards Sendai, Japan, 19-20 Oct 2013　161-164　2013/10/19
Inhomogeneity of fractal property in rock minerals using 3D X-ray CT measurement Peer-reviewed

Junko Yamaki, Jun Muto, Hiroyuki Nagahama, Osamu Sasaki, Harumasa Kano

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards Sendai, Japan, 19-20 Oct 2013　152-155　2013/10/19
Sinusoidal model for the annual variation of atmospheric radon concentration in Japan Peer-reviewed

Saki Nakamura, Koseki Hayashi, Yumi, Yasuoka, Hiroyuki Nagahama, Jun Muto, Yasutaka Omori, Tetsuo Ishikawa, Toshiyuki Suzuki, Yoshimi Homma, Hayato Ihara, Takahiro Mukai

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards Sendai, Japan, 19-20 Oct 2013　164-167　2013/10/19
Seismic luminous phenomena and VHF electromagnetic emission originated from radon emanation Peer-reviewed

Asuka Seki, Izumi Tohbo, Yasutaka Omori, Jun Muto, Hiroyuki Nagahama

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards Sendai, Japan, 19-20 Oct 2013　156-159　2013/10/19
Self-affinities Analysis of Fault-related Folding Peer-reviewed

Kazuhei Kikuchi, Kazutoshi Abiko, Hiroyuki Nagahama, Jun Muto

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards Sendai, Japan, 19-20 Oct 2013　2013/10/19
Fractal characteristic of fracture in glass or single crystals of quartz by 3D X-ray CT measurement Peer-reviewed

J. Yamaki, J. Muto, H. Nagahama, O. Sasaki, H.Kano

The 6th International Symposium on In-situ Rock Stress Sendai, Japan August 20-22, 2013　150-156　2013/08/20
Radon concentration of outdoor air: measured by an ionization chamber for radioisotope monitoring system at radioisotope institute Peer-reviewed

Yukari Tajika, Yumi Yasuoka, Hiroyuki Nagahama, Toshiyuki Suzuki, Yoshimi Homma, Tetsuo Ishikawa, Shinji Tokonami, Takahiro Mukai, Miroslaw Janik, Atsuyuki Sorimachi, Masahiro Hosoda

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY　295　(3)　1709-1714　2013/03

DOI： 10.1007/s10967-012-1999-0 　

ISSN： 0236-5731
課題１. 環境放射線を測る Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2012、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台　17-38　2013/03
Environmental radioactivity Invited Peer-reviewed

Naohito Iwasa, Hiroyuki Nagahama

2013 Introductory Science Experiments, Tohoku University　18-34　2013
大気中ラドン濃度の変動について：地震先行現象を捕えることができるのか？ Invited Peer-reviewed

安岡由美, 長濱裕幸

放射線教育フォーラムニュースレター　55　8-9　2013
Atmospheric radon concentration linked to crustal strain prior to and/or after earthquakes Peer-reviewed

Hatanaka H, Y. Yasuoka, J. Muto, H. Nagahama, T. Suzuki, Y. Homma, M. Sakashita, Y. Kobayashi, T. Mukai

Proceedings of the 14th Workshop on Environmental Radioactivity, Miura T, Kinoshita N (eds), High Energy Accelerated Research Organization (KEK), Tsukuba., in Japanese, with English abstr.)　印刷中　2013
地震発生先行過程に伴うラドン放出と地殻変形

長濱裕幸, 武藤潤

「地震予知のための新たな観測研究計画（第２次）」平成24年度年次報告科学技術・学術審議会測地学分科会地震火山部会観測研究計画推進委員会，成果報告書　2013
Amorphization of quartz by friction: Implication to silica-gel lubrication of fault surfaces Peer-reviewed

Yu Nakamura, Jun Muto, Hiroyuki Nagahama, Ichiko Shimizu, Takashi Miura, Ichiro Arakawa

GEOPHYSICAL RESEARCH LETTERS　39　L21303　2012/11

DOI： 10.1029/2012GL053228 　

ISSN： 0094-8276

eISSN： 1944-8007
Effect of crustal fluid on plastic deformation of polycrystalline anorthite Peer-reviewed

Jun Muto, Jun-ichi Fukuda, Hiroyuki Nagahama

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics (G-COE symposium 2012, Sendai City War reconstruction Memorial Hall in Sendai, Japan, September 25-28, 2012)　19-20　2012/09/25
Finsler geometry of ray paths in weakly anisotropic media Peer-reviewed

Takahiro Yajima, Kazuhito Yamasaki, Hiroyuki Nagahama

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics (G-COE symposium 2012, Sendai City War reconstruction Memorial Hall in Sendai, Japan, September 25-28, 2012)　31-32　2012/09/25
Fabric evolution of single crystals of synthetic quartz sheared at low temperature Peer-reviewed

Hideaki Kaneko, Jun Muto, Hiroyuki Nagahama

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics (G-COE symposium 2012, Sendai City War reconstruction Memorial Hall in Sendai, Japan, September 25-28, 2012)　213-214　2012/09/25
Microstructures and grain size distribution of pulverized fault rocks: Examples from SanAndreas Fault and Arima-Takatsuki Tectonic Line Peer-reviewed

Tsurugi Nakatani, Jun Muto, Osamu Nishikawa, Hiroyuki Nagahama, Kenshiro Otsuki

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics (G-COE symposium 2012, Sendai City War reconstruction Memorial Hall in Sendai, Japan, September 25-28, 2012)　215-216　2012/09/25
Spectrum analysis of pixel fluctuations in famous paintings Peer-reviewed

Kazuhei Kikuchi, Naoaki Bekki, Hiroyuki Nagahama

Proceeding of the Asia-Pacific Conferences on Fundamental Problems of Opto- and Microelectronics, Dalian, China, August, 21-25, 2012　170-173　2012/08/21
Anomalous change in atmospheric radon concentration sourced from broad crustal deformation: A case study of the 1995 Kobe earthquake Peer-reviewed

Yumi Yasuoka, Yusuke Kawada, Yasutaka Omori, Hiroyuki Nagahama, Tetsuo Ishikawa, Shinji Tokonami, Masahiro Hosoda, Tetsuo Hashimoto, Masaki Shinogi

APPLIED GEOCHEMISTRY　27　(4)　825-830　2012/04

DOI： 10.1016/j.apgeochem.2011.12.018 　

ISSN： 0883-2927
Subsurface Magnetized Source Layers underneath the Mare Crisium Observed by Lunar Radar Sounder Peer-reviewed

Y. Bando, A. Kumamoto, N. Nakamura, H. Nagahama

43rd Lunar and Planetary Science Conference, Woodlands, U.S.A, 19-23, March, 2012　1380.pdf　2012/03/19
Fractal properties of fracture in rock mineral using 3D X-ray CT measurement Peer-reviewed

Junko Yamaki, Jun Muto, Hiroyuki Nagahama, Osamu Sasaki, Harumasa Kano

The 10th International Workshop on WATER DYNAMICS (Deep Carbon Cycle /Geosphere Pollution) &ICDP Japan Beyond-Brittle Project Sendai, Japan March 12-14, 2013　82-82　2012/03/12
Microstructures and grain size distribution of pulverized fault rocks Peer-reviewed

Jun Muto, Tsurugi Nakatani, Osamu Nishikawa, Hiroyuki Nagahama

The 10th International Workshop on WATER DYNAMICS (Deep Carbon Cycle /Geosphere Pollution) &ICDP Japan Beyond-Brittle Project Sendai, Japan March 12-14, 2013　79-79　2012/03/12
Experimental study about mechanical behavior of simulated fault gouge toward unstable slip Peer-reviewed

Momoko Hirata, Jun Muto, Hiroyuki Nagahama, Kenshiro Otsuki

The 10th International Workshop on WATER DYNAMICS (Deep Carbon Cycle /Geosphere Pollution) &ICDP Japan Beyond-Brittle Project Sendai, Japan March 12-14, 2013　80-80　2012/03/12
Experimental investigation of the effect of water on fabric development of anorthite Peer-reviewed

Fukuda J, Muto J, Nagahama H

The 9th International Workshop on Water Dynamics, Sendai, P2, Japan, 7-9, March, 2012　2012/03/07
Atmospheric Radon Variation Before and After the 2011 Tohoku Earthquake (MW = 9.0) Invited Peer-reviewed

Yasuoka, Y, Tsuge, M, Miyamoto, S, Nagahama, H, Suzuki, T, Homma, Y, Kubota, K, Mukai, T

NARE 2012 SYMPOSIUM on the NATURAL RADIATION EXPOSURES and LOW DOSE RADIATION EPIDEMIOLOGICAL STUDIES, Hirosaki, Japan　2012/03/02
課題１. 環境放射線を測る Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2012、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台　13-34　2012/03
Radon Anomalies Prior to Earthquake Invited Peer-reviewed

Yumi Yasuoka, Tetsuo Ishikawa, HIroyuki Nagahama, Yusuke Kawada, Yasutaka Omori, Shinji Tokonami, Masaki Shinoki

The Frontier of Earthquake Prediction Studies　410-427　2012/02/02
Magnetic anomaly in Mare Crisium observed by Lunar Radar Sounder: Interpretaion based on the lunar core dynamo model Peer-reviewed

Y. Bando, A. Kumamoto, N. Nakamura, H. Nagahama

The 6th KAGUYA (SELENE) Science Working Team Meeting - New Light on the Origin and Evolution of the Moon -, Nagoya, Japan, 1-12, January, 2012　2012/01/10
Water introduction into porycrystalline feldspar and enhancement of plastic deformation

Fukuda Jun-ichi, Muto Jun, Hiroyuki Nagahama

Annual Meeting of the Geological Society of Japan　2012　113-113　2012
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2012.0_113 　
Geometry of viscoelastic constitutive equations and fractional derivative

Nagahama Hiroyuki, Yajima Takahiro

Annual Meeting of the Geological Society of Japan　2012　252-252　2012
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2012.0_252 　
The quantitative comparison research of Planktonic Foraminifera Chamber Form with 3-D Geometric Morphometric Analysis

Ito Hikaru, Sasaki Osamu, Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　2012　525-525　2012
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2012.0_525 　
Anomalous Atmospheric Radon Variation before an Earthquake: A Case Study of the 1995 Kobe Earthquake, Japan Invited Peer-reviewed

Yasuoka, Y, Ishikawa, T, Omori, Y, Kawada, Y, Nagahama, H, Tokonami, S, Shinogi, M

Handbook of Radon: Properties, Applications and Health, In: Li, Z. & Feng, C. (eds.)　389-403　2012
「ラドン濃度変動と地震－地震先行現象の痕跡を排気モニターに求めて－」 Invited Peer-reviewed

安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 向高弘

FBNews　428　1-5　2012
Subsurface Magnetized Source Layers underneath the Mare Crisium Observed by Lunar Radar Sounder Peer-reviewed

Bando, Y, Kumamoto, A, Nakamura, N, Nagahama, H

43rd Lunar and Planetary Science Conference　1380　2012
Magnetic anomaly in Mare Crisium observed by Lunar Radar Sounder: Interpretaion based on the lunar core dynamo model Peer-reviewed

Bando, Y, Kumamoto, A, Nakamura, N, Nagahama, H

The 6th KAGUYA (SELENE) Science Working Team Meeting - New Light on the Origin and Evolution of the Moon　15　2012
Spectrum analysis of pixel fluctuations in famous paintings Peer-reviewed

Kikuchi, K, Bekki, N, Nagahama, H

Proceeding of the Asia-Pacific Conferences on Fundamental Problems of Opto- and Microelectronics, Dalian University of Technology　170-173　2012
地震発生先行過程に伴うラドン放出と地殻変形

長濱裕幸, 武藤潤

「地震に先行する大気中ラドン濃度変動に関する観測, 「災害の軽減に貢献するための地震火山観測研究計画の推進について成果」報告書　2012
Finsler metric and elastic constants for weak anisotropic media Peer-reviewed

Takahiro Yajima, Kazuhito Yamasaki, Hiroyuki Nagahama

NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS　12　(6)　3177-3184　2011/12

DOI： 10.1016/j.nonrwa.2011.05.018 　

ISSN： 1468-1218
Electric potential changes associated with nucleation of stick-slip of simulated gouges Peer-reviewed

Kumi Onuma, Jun Muto, Hiroyuki Nagahama, Kenshiro Otsuki

TECTONOPHYSICS　502　(3-4)　308-314　2011/04

DOI： 10.1016/j.tecto.2011.01.018 　

ISSN： 0040-1951
課題１. 環境放射線を測る Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2011、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台　13-34　2011/03
Anomalous Radon Concentration Prior to an Earthquake: A Case Study on the 1995 Kobe Earthquake, Japan Invited Peer-reviewed

Yasuoka, Y, Nagahama, H, Ishikawa, T

LAP LAMBERT Academic Publishing, Saarbrücken, Germany　138　2011
Differential geometry of viscoelastic models with fractional-order derivatives Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL　43　(38)　385207　2010/09

DOI： 10.1088/1751-8113/43/38/385207 　

ISSN： 1751-8113
Linear relations among atmospheric radon concentration, air temperature, and net radiation in nighttime, and their implications Peer-reviewed

Omori, Y, Nagahama, H, Ishikawa, Y, Kimura, A, Nagayama, M, Sekine, T

19th Symposium on Boundary Layers and Turbulence, August 2-8, 2010, Keystone, USA, P3.2, Session: 3 Stable Boundary Layers.　2010/08
Tangent bundle viewpoint of the Lorenz system and its chaotic behavior Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

PHYSICS LETTERS A　374　(11-12)　1315-1319　2010/03

DOI： 10.1016/j.physleta.2010.01.025 　

ISSN： 0375-9601

eISSN： 1873-2429
宮城県牡鹿半島におけるバイモーダルな大気中ラドン濃度変動 Peer-reviewed

大森康孝, 東穂いづみ, 長濱裕幸, 石川陽一, 高橋正人, 佐藤博明, 関根勉

第11回「環境放射能研究会］要旨論文集　2010/03
課題１. 環境放射線を測る Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2010、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台　13-34　2010/03
Inner Structure and 3-D Morphometry of Planktonic Foraminifera by X-ray CT Peer-reviewed

遠藤孝義, 佐々木理, 長濱裕幸

第３回東北大学大学院理学研究科６専攻合同シンポジウム「ヤングブレインズの連携による学際的研究の創造，講演要旨集，仙台, 2010年2月16日　126-126　2010/02/16
Inner Structure and 3-D Morphometry of Planktonic Foraminifera by X-ray CT Peer-reviewed

遠藤孝義, 佐々木理, 長濱裕幸

第３回東北大学大学院理学研究科６専攻合同シンポジウム「ヤングブレインズの連携による学際的研究の創造，講演要旨集　126-126　2010/02/16
Skin depth of electromagnetic wave through fractal crustal rocks Peer-reviewed

Kazutaka Takahara, Jun Muto, Hiroyuki Nagahama

IEEJ Transactions on Fundamentals and Materials　130　(3)　6-264　2010

DOI： 10.1541/ieejfms.130.258 　

ISSN： 0385-4205 1347-5533

eISSN： 1347-5533
地震発生先行過程に伴うラドン放出と地殻変形 Peer-reviewed

長濱裕幸, 武藤潤, 中村教博, 大槻憲四郎

「地震予知のための新たな観測研究計画（第２次）」平成２１年度年次報告科学技術・学術審議会測地学分科会地震火山部会観測研究計画推進委員会　2010
石英のすべり摩擦による放電発光と地震前兆電磁気現象について Peer-reviewed

武藤潤, 長濱裕幸, 三浦崇, 荒川一郎

月刊地球　32　484-490　2010
Electromagnetic signals prior to stick slip and microstructural development in simulated gouges Peer-reviewed

Onuma, K, Muto, J, Nagahama, H, K. Otsuki

Proc. GCOE Symposium “ HYPERLINK "http://www.aob.geophys.tohoku.ac.jp/%7Egcoe-arc2010/" \\t "_blank" Earthquakes, Active Tectonics and Geodynamics of Island Arcs”　2010
Geometrical unified theory of Rikitake system and KCC-theory Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS　71　(12)　E203-E210　2009/12

DOI： 10.1016/j.na.2008.10.017 　

ISSN： 0362-546X

eISSN： 1873-5215
Variation of atmospheric radon concentration with bimodal seasonality Peer-reviewed

Yasutaka Omori, Izumi Tohbo, Hiroyuki Nagahama, Yoichi Ishikawa, Masato Takahashi, Hiroaki Sato, Tsutomu Sekine

RADIATION MEASUREMENTS　44　(9-10)　1045-1050　2009/10

DOI： 10.1016/j.radmeas.2009.10.077 　

ISSN： 1350-4487
Extended objects as topological singularities in non-Riemannian space Peer-reviewed

Yajima, T, Nagahama, H, Wadati, M

Proceedings of the 44-th Symposium on Finsler Geometry at Sapporo, Sep. 8-Sept.11, 2009, Japan. In: Hideo Shimada ed. Society of Finsler Geometry, Japan　78-81　2009/09
Finsler geometry of seismic ray path in anisotropic media Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES　465　(2106)　1763-1777　2009/06

DOI： 10.1098/rspa.2008.0453 　

ISSN： 1364-5021

eISSN： 1471-2946
Preseismic changes in atmospheric radon concentration and crustal strain Peer-reviewed

Yumi Yasuoka, Yusuke Kawada, Hiroyuki Nagahama, Yasutaka Omori, Tetsuo Ishikawa, Shinji Tokonami, Masaki Shinogi

PHYSICS AND CHEMISTRY OF THE EARTH　34　(6-7)　431-434　2009

DOI： 10.1016/j.pce.2008.06.005 　

ISSN： 1474-7065

eISSN： 1873-5193
Preseismic alteration of atmospheric electrical conditions due to anomalous radon emanation Peer-reviewed

Yasutaka Omori, Hiroyuki Nagahama, Yusuke Kawada, Yumi Yasuoka, Tetsuo Ishikawa, Shinji Tokonami, Masaki Shinogi

PHYSICS AND CHEMISTRY OF THE EARTH　34　(6-7)　435-440　2009

DOI： 10.1016/j.pce.2008.08.001 　

ISSN： 1474-7065
Afterslip associated with interplate earthquakes and the viscoelastic behavior of rocks Peer-reviewed

Kawada, Y, Nagahama, H, Uchida, N, Matsuzawa T

地質学雑誌　115　(9)　448-456　2009
Publisher: The Geological Society of Japan
DOI： 10.5575/geosoc.115.448 　

ISSN： 0016-7630

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Temporal changes in afterslip displacement rate associated with interplate earthquakes are investigated using a constitutive law for the viscoelastic behavior of rocks. The law is based on irreversible thermodynamics with internal state variables and is derived as the relaxation modulus following a temporal power law that emerges as the collective dynamics of internal states with respective relaxation times at various time-scales. The constitutive law can represent the transient behavior in response to sudden changes in stress and strain rate, as well as the steady-state behavior of rocks. Analysis of afterslip (cumulative displacement) time series estimated from the seismic moments of small repeating earthquakes in the northeastern Japan subduction zone shows that the temporal change in afterslip follows a temporal power law. This finding suggests that afterslip comprises many transient responses associated with seismic events of various sizes.
Ｘ線ＣＴによる浮遊性有孔虫の内部構造と三次元計測 Peer-reviewed

遠藤孝義, 佐々木理, 岩下智洋, 尾田太良, 長濱裕幸

形の科学会誌　24　(1)　81-81　2009

ISSN： 0915-6089
課題１. 環境放射線を測る Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2009、東北大学自然科学総合実験テキスト編集委員会（編）、13-34、東北大学出版会、仙台　13-34　2009
Unique variation of atmospheric radon concentration Peer-reviewed

Y. Omori, H. Nagahama, I. Tohbo, Y. Ishikawa, M. Takahashi, H. Sato, T. Sekine

The 24th International Conference on Nuclear Tracks in Solids, September 1-5, 2008, Bologna, Italy　2008/09
Anomalous radon release into the atmosphere prior to earthquakes around the Oshika Peninsula, NE Japan Peer-reviewed

Y. Omori, H. Nagahama, I. Tohbo, Y. Ishikawa, M. Takahashi, H. Sato, T. Sekine

EMSEV-DEMETER Joint Workshop, September 7-12, 2008, Sinaia, Romania, 6.3, Session: 6 Imaging active faults, volcanoes, landslides and geothermal fields by EM methods. Integration of other methods: geophysical, geochemical, geological, etc　2008/09
Skin depth of electromagnetic wave through fractal porous rocks Peer-reviewed

K. Takahara, J. Muto, H. Nagahama

EMSEV-DEMETER Joint Workshop, September 7-12, 2008, Sinaia, Romania, 4.4, Session: 4 Generation and popagation mechanism of EM signals, and related laboratory experiments　2008/09
Energy integral in fracture mechanics (J-integral) and Gauss-Bonnet theorem. Energy integral in fracture mechanics (J-integral) and Gauss-Bonnet Theorem Peer-reviewed

K. Yamasaki, H. Nagahama

ZAMM (Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik)　88　(6)　515-520　2008/05/09

DOI： 10.1002/zamm.200700140Zeitschrift 　
Frictional discharge plasma and seismo-electromagnetic phenomena Peer-reviewed

Jun Muto, Hiroyuki Nagahama, Takashi Miura, Ichiro Arakawa

PHYSICS OF THE EARTH AND PLANETARY INTERIORS　168　(1-2)　1-5　2008/05

DOI： 10.1016/j.pepi.2008.04.014 　

ISSN： 0031-9201
課題3. 地球大気の大循環、東北大学全学教育科目テキスト・文科系開講自然科学総合実験 Invited Peer-reviewed

長濱裕幸

東北大学文科系開講自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台　33-44　2008/04
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2008 Invited Peer-reviewed

長濱裕幸

東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台. 285pp　11-32　2008/04
A geometrical approach to soliton systems in Kawaguchi space

T. Yajima, H. Nagahama

Proceedings of the 42-th Symposium on Finsler Geometry, 1-4 November, 2007, Nagasaki, Japan, Hideo Shimada & Sorin V. Sabau eds.　42-45　2008/03
身近な環境放射能を知るための理科実験プログラムの開発

関根勉, 長濱裕幸, 中村教博

東北大学高等教育開発推進センター紀要　(3)　259-266　2008/03
Publisher:
ISSN： 1881-0853
Changing in radon exhalation before the Kobe earthquake Invited Peer-reviewed

Y. Yasuoka, H. Nagahama, T. Ishikawa, Y. Kawada, Y. Omori, S. Tokonami, T. Hashimoto, M. Shinogi

Proceeding of the Eighth Workshop on Enviromental Radioactivity, High Eneregy Accelrated Research Organization (KEK), Tsukuba, Japan March 22-24, 2007　138-142　2008/02
東北大学初年次学生への環境放射能教育− 自然科学総合実験 − Peer-reviewed

関根勉, 石川賢一, 須藤彰三, 吉田武義, 岩佐直仁, 長濱裕幸, 中村教博

第8回「環境放射能」研究会、3月22日-24日、高エネルギー加速器研究機構、つくば (Edited by Taichi Miura & Norikazu Kinoshita, Proceeding of the Eighth Workshop on Enviromental Radioactivity, High Eneregy Accelrated Research Organization (KEK), Tsukuba, Japan March 22-24, 2007.)　199-204　2008/02
Atmospheric radon concentration and crustal strain around the Oshika Peninsula, Miyagi prefecture

Omori Yasutaka, Nagahama Hiroyuki, Tohbo Izumi, Ishikawa Yo-ichi, Takahashi Masato, Sato Hiroaki, Sekine Tsutomu

Annual Meeting of the Geological Society of Japan　2008　429-429　2008
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2008.0.429.0 　

ISSN： 1348-3935
Radon Anomalies Prior to Earthquakes (I)-Review of Previous Studies- Invited Peer-reviewed

Tetsuo ISHIKAWA, Yumi YASUOKA, Hiroyuki NAGAHAMA, Yusuke KAWADA, Yasutaka OMORI, Shinji TOKONAMI, Masaki SHINOGI

Japanese Journal of Health Physics　43　(2)　103-111　2008
Publisher: Japan Health Physics Society
DOI： 10.5453/jhps.43.103 　

ISSN： 0367-6110

eISSN： 1884-7560
Nonlinear dynamical systems and KCC-theory Invited Peer-reviewed

T. Yajima, H. Nagahama

Acta Mathematica Academiae Paedagogicae Nyiregyhasiensis (AMAPN; Electronic journal of the Institute of Mathematics and Computer Science, College of Nyíregyháza　24　(1)　179-189　2008
Continuum theory of defects: Advanced approaches Invited Peer-reviewed

Hiroyuki Nagahama, Roman Teisseyre

Physics of Asymmetric Continuum: Extreme and Fracture Processes: Earthquake Rotation and Soliton Waves　221-248　2008
Publisher: Springer Berlin Heidelberg
DOI： 10.1007/978-3-540-68360-5_17 　
地震と大気中ラドン濃度の変化（II）−従来の観測例− Invited Peer-reviewed

石川徹夫, 安岡由美, 長濱裕幸, 川田祐介, 大森康孝, 床次眞司, 志野木正樹

保健物理　43　(3)　253-267　2008
Publisher: Japan Health Physics Society
DOI： 10.5453/jhps.43.253 　

ISSN： 0367-6110

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Before the 1995 Hyogoken-Nanbu earthquake, various geochemical precursors were observed in the aftershock area: chloride ion concentration, groundwater discharge rate, groundwater radon concentration and so on. Kobe Pharmaceutical University (KPU) is located about 25km northeast from the epicenter and within the aftershock area. Atmospheric radon concentration had been continuously measured from 1984 at KPU, using a flow-type ionization chamber. The radon concentration data were analyzed using the smoothed residual values which represent the daily minimum of radon concentration with the exclusion of normalized seasonal variation. The radon concentration (smoothed residual values) demonstrated an upward trend about two months before the Hyogoken-Nanbu earthquake. The trend can be well fitted to a log-periodic model related to earthquake fault dynamics. As a result of model fitting, a critical point was calculated to be between 13 and 27 January 1995, which was in good agreement with the occurrence date of earthquake (17 January 1995). The mechanism of radon anomaly before earthquakes is not fully understood. However, it might be possible to detect atmospheric radon anomaly as a precursor before a large earthquake, if (1) the measurement is conducted near the earthquake fault, (2) the monitoring station is located on granite (radon-rich) areas, and (3) the measurement is conducted for more than several years before the earthquake to obtain background data.
Geometrical invariants of Rikitake system in KCC-theory Peer-reviewed

T. Yajima, H. Nagahama

Tensor　69　106-113　2008
Increases in radon exhalation and changes of atmospheric electric parameters accompanying percolation process in crust

Y. Omori, Y. Yasuoka, H. Nagahama, Y. Kawada, T. Ishikawa, S. Tokonami, M. Shinogi

International Workshop on Seismo-Electromagnetic Phenomena 2007, November 6-7, 2007, Bandung, Indonesia. Abstracts　31　2007/11
Re-interpretation on flow law of rocks based on temporal scaling and nonlinear damage effect in viscoelastic behaviour Invited Peer-reviewed

Y. Kawada, H. Nagahama, K. Otsuki

16th Conference on Deformation Mechanisms, Rheology and Tectonics (DRT2007) (Milano, Italy, 27 September -2 October, 2007)　2007/09
Soliton systems and Kawaguchi space Peer-reviewed

T. Yajima, H. Nagahama

Conference on Differential Geometry. Lagrange and Hamilton Spaces.Dedicated to Acad. Prof. Dr. Radu Miron at his 80th anniversary, September 3-8, 2007, Faculty of Mathematics, Al.I.Cuza University, Iasi, Romania.　2007/09
Changes in atmospheric electrical conditions due to anomalous radon exhalation preceding large earthquakes Peer-reviewed

Y. Omori, Y. Yasuoka, H. Nagahama, Y. Kawada, T. Ishikawa, S. Tokonami, M. Shinogi

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”. Poster presentation　2007/09
Higher-order geometry of solitary waves in solid earth Peer-reviewed

T. Yajima, H. Nagahama

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”　2007/09
Earthquake precursory phenomenon: an anomalous increase in atmospheric radon concentration Invited Peer-reviewed

H. Nagahama, Y. Kawada, Y. Omori, Y Yasuoka, T. Ishikawa, S. Tokonami, M. Shinogi

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”　2007/09
Electric dipoles during a stick-slip event of quartz pegmatite

A. Takuchi, H. Nagahama, F. Freund

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”　53-56　2007/09
Soliton systems and Zermelo condition in higher-order space, 10th International Conference on Differential Geometry and Its Applications Peer-reviewed

T. Yajima, H. Nagahama

. In honour of the 300th anniversary of the birth of Leonhard Euler, August 27–31, 2007, Olomouc, Czech Republic　2007/08
An anomalous increase in atmospheric radon prior to the Kobe earthquake Invited Peer-reviewed

Y. Yasuoka, H. Nagahama, Y. Kawada, Y. Omori, T. Ishikawa, S. Tokonami, M. Shinogi

Bilateral Seminar Italy-Japan on Electromagnetics in Seismic and Volcanic Areas (Chiba, Japan, 25 July -27 July, 2007)　2007/07
Nonlinear dynamical systems and KCC theory Peer-reviewed

T. Yajima, H. Nagahama

Workshop on Finsler Geometry and its Applications, May 28 - June 2, 2007, Balatonfoldvar, Hungary　2007/06
地震波線理論の幾何学—フィンスラ−幾何学によるアプローチ— Invited Peer-reviewed

谷島尚宏, 長濱裕幸

月刊地球　29　(4)　247-251　2007/04
課題１. 環境放射線を測る Invited Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2007、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台. 285pp.　11-31　2007/04
課題3. 地球大気の大循環 Invited Peer-reviewed

長濱裕幸

東北大学全学教育科目テキスト・文科系のための自然科学総合実験、東北大学文科系のための自然科学総合実験テキスト編集委員会（編）、17-28、東北大学出版会、仙台. 177pp.　17-28　2007/04
Variation of electric parameters in atmosphere due to radon exhalation prior to a large earthquake Peer-reviewed

Y. Omori, Y. Yasuoka, H. Nagahama, Y. Kawada, T. Ishikawa, S. Tokonami, M. Shinogi

Geophysical Research Abstract　9　05945　2007/04
Temporal power-law change in rock magnetization prior to failure Peer-reviewed

Y. Kawada, H. Nagahama, N. Nakamura

Geophysical Research Abstract　9　05946　2007/04
KCC-theory and geometry of the Rikitake system Peer-reviewed

T. Yajima, H. Nagahama

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL　40　(11)　2755-2772　2007/03

DOI： 10.1088/1751-8113/40/11/011 　

ISSN： 1751-8113
東北大学初年次学生への環境放射能教育− 自然科学総合実験 − Peer-reviewed

関根勉, 石川賢一, 須藤彰三, 吉田武義, 岩佐直仁, 長濱裕幸, 中村教博

第8回「環境放射能」研究会、3月22日-24日、高エネルギー加速器研究機構、つくば (Edited by T. Miura, Proceeding of the Eighth Workshop on Enviromental Radioactivity, High Eneregy Accelrated Research Organization (KEK), Tsukuba Japan March 22-24, 2007.)　2007/03
Changing in radon exhalation before the Kobe earthquake Peer-reviewed

Y. Yasuoka, H. Nagahama, T. Ishikawa, Y. Kawada, Y. Omori, S. Tokonami, T. Hashimoto, M. Shinogi

The Eighth Workshop on Enviromental Radioactivity, High Eneregy Accelrated Research Organization (KEK), Tsukuba Japan March 22-24, 2007.　2007/03
Kawaguchi space, Zermelo's condition and seismic ray path Peer-reviewed

T. Yajima, H. Nagahama

NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS　8　(1)　130-135　2007/02

DOI： 10.1016/j.nonrwa.2005.06.004 　

ISSN： 1468-1218
Frictional discharge at fault asperities: Origin of fractal seismo-electromagnetic radiation Invited Peer-reviewed

Jun Muto, Hiroyuki Nagahama, Takashi Miura, Ichiro Arakawa

TECTONOPHYSICS　431　(1-4)　113-122　2007/02

DOI： 10.1016/j.tecto.2006.05.045 　

ISSN： 0040-1951

eISSN： 1879-3266
Time-scale invariant changes in atmospheric radon concentration and crustal strain prior to a large earthquake Invited Peer-reviewed

Y. Kawada, H. Nagahama, Y. Omori, Y. Yasuoka, T. Ishikawa, S. Tokonami, M. Shinogi

NONLINEAR PROCESSES IN GEOPHYSICS　14　(2)　123-130　2007

ISSN： 1023-5809
Time-scale invariances in preseismic electromagnetic radiation, magnetization and damage evolution of rocks Invited Peer-reviewed

Y. Kawada, H. Nagahama, N. Nakamura

NATURAL HAZARDS AND EARTH SYSTEM SCIENCES　7　(5)　599-606　2007

ISSN： 1561-8633
Anomalous radon emanation linked to preseismic electromagnetic phenomena Invited Peer-reviewed

Y. Omori, Y. Yasuoka, H. Nagahama, Y. Kawada, T. Ishikawa, S. Tokonami, M. Shinogi

NATURAL HAZARDS AND EARTH SYSTEM SCIENCES　7　(5)　629-635　2007

ISSN： 1561-8633
Physical fields, soliton systems and Kawaguchi space Invited Peer-reviewed

T. Yajima, H. Nagahama

Journal of Analele Universitatii "Al.I.Cuza" Iasi, seria Matematica　53　333-355　2007
Irreversible thermodynamic and viscoelastic model for power-law relaxation and attenuation of rocks Invited Peer-reviewed

Yusuke Kawada, Hiroyuki Nagahama, Hiroaki Hara

TECTONOPHYSICS　427　(1-4)　255-263　2006/12

DOI： 10.1016/j.tecto.2006.03.049 　

ISSN： 0040-1951
Seismic ray path in an anisotropic medium from a view point of Finsler geometry Invited Peer-reviewed

T. Yajima, H. Nagahama

Symp. on Finsler Geom. at Kagoshima, Nov. 10-Nov.12 2006　2006/11
Cumulative Benioff strain-release, modified Omori's law and transient behaviour of rocks Invited Peer-reviewed

Yusuke Kawada, Hiroyuki Nagahama

TECTONOPHYSICS　424　(3-4)　157-166　2006/10

DOI： 10.1016/j.tecto.2006.03.032 　

ISSN： 0040-1951
課題3. 大気の大循環 Invited Peer-reviewed

長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2006 supplement、補遺、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台. 47pp.　17-28　2006/10
Surface resetting of thermoluminescence in milled quartz grains Invited Peer-reviewed

Akihiro Takeuchi, Hiroyuki Nagahama, Tetsuo Hashimoto

RADIATION MEASUREMENTS　41　(7-8)　826-830　2006/08

DOI： 10.1016/j.radmeas.2006.05.009 　

ISSN： 1350-4487
Electric dipoles perpendicular to a stick-slip plane Peer-reviewed

Akihiro Takeuchi, Hiroyuki Nagahama

PHYSICS OF THE EARTH AND PLANETARY INTERIORS　155　(3-4)　208-218　2006/05

DOI： 10.1016/j.pepi.2005.12.010 　

ISSN： 0031-9201

eISSN： 1872-7395
Symmetropy of earthquake patterns: asymmetry and rotation in a disordered seismic source Invited Peer-reviewed

Kazuyoshi Z. Nanjo, Hiroyuki Nagahama, Eiji Yodogawa

ACTA GEOPHYSICA　54　(1)　3-14　2006/04

DOI： 10.2478/s11600-006-0002-2 　

ISSN： 1895-6572

eISSN： 1895-7455
Frictional Discharge from Sheared Asperities : Implication for Fractal Seismo-electromagnetic Radiation Invited Peer-reviewed

MUTO Jun, NAGAHAMA Hiroyuki, MIURA Takashi, ARAKAWA Ichiro

IEEJ Transactions on Fundamentals and Materials　126　(4)　242-243　2006/04/01
Publisher: The Institute of Electrical Engineers of Japan
DOI： 10.1541/ieejfms.126.242 　

ISSN： 0385-4205

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To clarify the fractal natures of electromagnetic radiations prior to earthquakes, we conducted a friction experiment simulating the essential elements of the motion of an asperity on a fault plane, and observed the generation of photon emissions around frictional contacts due to the dielectric breakdown of ambient gases by frictional electrification. According to the fractal distribution of fault asperities, we show that the frictional discharge (plasma generation) at asperities on the fault plane can be one of origins of the fractal seismo-electromagnetic radiation prior to earthquakes.
Differential geometry of nonlinear dynamical system: application to Rikitake dynamo system Invited Peer-reviewed

T. Yajima, H. Nagahama

European Geosciences Union General Assembly, Vienna, Austria, 02-07, April, 2006. In: Geophysical Research Abstract　8　06524　2006/04
Irreversible thermodynamics and time-scale invariance for viscoelastic behaviour of rocks Invited Peer-reviewed

Y. Kawada, H. Nagahama

General Assembly of the European Geosciences Union 2006, EGU 2006 (Vienna, Austria, 2-7 April, 2006), EGU06-A-06684. Organized by European Geosciences Union. Session: NP3.07 Scaling, scale and nonlinearity in Solid Earth (Convener: Cheng, Q.; Co-Convener:　8　06684　2006/04
課題１. 環境放射線を測る Invited Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2006、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台. 285pp.　11-31　2006/04
P-71 Strain-release process of crustal rocks and atmospheric Radon concentration prior to a mainshock

Nagahama Hiroyuki, Kawada Yusuke, Omori Yasutaka, Yasuoka Yumi, Shinogi Masaki

Annual Meeting of the Geological Society of Japan　2006　203-203　2006
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2006.0_203_2 　
Frictional discharge plasma from natural semiconductor/insulator junctions: Origin of seismo-electromagnetic radiation Invited Peer-reviewed

Jun Muto, Hiroyuki Nagahama, Takashi Miura, Ichiro Arakawa

PHYSICS AND CHEMISTRY OF THE EARTH　31　(4-9)　346-351　2006

DOI： 10.1016/j.pce.2006.02.040 　

ISSN： 1474-7065

eISSN： 1873-5193
フィンスラー幾何学に基づく異方性媒質中の地震波線理論

谷島尚宏, 長濱裕幸

形の科学会誌　21　(2)　196-197　2006
) Temporal power-laws on preseismic activation and aftershock decay affected by transient behavior of rocks Invited Peer-reviewed

Y. Kawada, H. Nagahama

The 4th International Workshop on Statistical Seismology, Statsei4 (Hayama (Kanagawa), Japan, 9-13 January, 2006). Organized by Institute of Statistical Mathematics. In: ISM Report on Research and Education　(23)　142-145　2006/01
Micromorphic continuum with defects and Taylor-Bishop-Hill theory for polycrystals: Anisotropic propagation of seismic waves and the Golebiewska gauge Invited Peer-reviewed

Jun Muto, Yusuke Kawada, Hiroyuki Nagahama

Earthquake Source Asymmetry, Structural Media and Rotation Effects　317-328　2006
Publisher: Springer Berlin Heidelberg
DOI： 10.1007/3-540-31337-0_24 　
Seismic ray theory for structural medium based on Kawaguchi and Finsler geometry Invited Peer-reviewed

Takahiro Yajima, Hiroyuki Nagahama

Earthquake Source Asymmetry, Structural Media and Rotation Effects　329-336　2006
Publisher: Springer Berlin Heidelberg
DOI： 10.1007/3-540-31337-0_25 　
From non-local to asymmetric deformation field Invited Peer-reviewed

Hiroyuki Nagahama, Roman Teisseyre

Earthquake Source Asymmetry, Structural Media and Rotation Effects　337-346　2006
Publisher: Springer Berlin Heidelberg
DOI： 10.1007/3-540-31337-0_26 　
Frictional discharge plasma and origin of fractal seismo-electromagnetic radiation Invited Peer-reviewed

J. Muto, H. Nagahama, T. Miura, I. Arakawa

21COE International Symposium 2005, Spatial and Temporal Fluctuations in the Solid Earth, - Clues to the Future of Our Planet -, July 22 - 27, 2005, Sendai, Japan.　176-177　2005/07
Seismic ray theory from a view point of Kawaguchi space Invited Peer-reviewed

T. Yajima, H. Nagahama

21COE International Symposium 2005, Spatial and Temporal Fluctuations in the Solid Earth, - Clues to the Future of Our Planet -, July 22 - 27, 2005, Sendai, Japan.　122-125　2005/07
Scaled Langevin equation and the inversion for viscoelastic behaviour of rocks in seismic time-scale: theoretical approach Invited Peer-reviewed

Y. Kawada, H. Nagahama, H. Hara

21COE International Symposium 2005, Spatial and Temporal Fluctuations in the Solid Earth, - Clues to the Future of Our Planet -, July 22 - 27, 2005, Sendai, Japan.　158-161　2005/07
Local zero setting of thermoluminescence in milled quartz grains Invited Peer-reviewed

A.Takeuchi, H. Nagahama, T. Hashimoto

11th International Conference on Luminescence and Electron Spin Resonance Dating (Cologne, Germany, July 24-29, 2005), Book of Abstracts　180　2005/07
Scaled Langevin equation and the inversion for viscoelastic behaviour of rocks Invited Peer-reviewed

Y. Kawada, H. Nagahama, H. Hara

The 15th Conference on Deformation Mechanisms, Rheology and Tectonics, ETH Zurich, 2-4 May 2005.　120　2005/05
Symmetropy of fault patterns: Quantitative measurement of anisotropy and entropic heterogeneity Peer-reviewed

KZ Nanjo, H Nagahama, E Yodogawa

MATHEMATICAL GEOLOGY　37　(3)　277-293　2005/04

DOI： 10.1007/s11004-005-1559-z 　

ISSN： 0882-8121
Scaled Langevin equation and the inversion for viscoelastic behaviour of rocks Invited Peer-reviewed

Y. Kawada, H. Nagahama, H. Hara

The General Assembly of the European Geosciences Union (EGU), the Austria Center Vienna (ACV), Vienna, Austria, 24 - 29 April 2005", Geophysical Research Abstract　5　08126　2005/04
課題１. 環境放射線を測る Invited Peer-reviewed

岩佐直仁, 長濱裕幸

東北大学全学教育科目テキスト・自然科学総合実験2005、東北大学自然科学総合実験テキスト編集委員会（編）, 東北大学出版会、仙台. 243pp.　11-32　2005/04
Long time tail for mechanical relaxation behavior of rocks and the response to earthquakes

Kawada Yusuke, Nagahama Hiroyuki, Hara Hiroaki

Annual Meeting of the Geological Society of Japan　2005　262-262　2005
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2005.0_262_1 　
Water distribution in dynamically recrystallized quartz grains: Cathodoluminescence and micro-infrared spectroscopic mapping Invited Peer-reviewed

Jun Muto, Hiroyuki Nagahama, Tetsuo Hashimoto

Geological Society Special Publication　245　397-407　2005

DOI： 10.1144/GSL.SP.2005.245.01.19 　

ISSN： 0305-8719
Electric discharge plasma from frictional nature quartz: One origin of seismo-electromagnetic radiation Invited Peer-reviewed

J. Muto, H. Nagahama, T. Miura, I. Arakawa

Proceedings of the 4th IWSE (International Workshop on Seismo Electromagnetics), March 15-17, 2005, Chofu, Tokyo.　2005
石英からの熱ルミネッセンス摩砕による影響 Invited Peer-reviewed

竹内昭洋, 橋本哲夫, 長濱裕幸

日本放射化学会誌　別冊6　129　2005
Microinfrared reflection spectroscopic mapping: Application to the detection of hydrogen-related species in natural quartz Peer-reviewed

J. Muto, H. Nagahama, T. Hashimoto

Journal of Microscopy　216　(3)　222-228　2004/12

DOI： 10.1111/j.0022-2720.2004.01419.x 　

ISSN： 0022-2720
Discussions on fractals, aftershocks, and active faults: Diffusion and seismo-electromagnetism Peer-reviewed

K Nanjo, H Nagahama

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING　29　(2C)　147-167　2004/12

ISSN： 2193-567X

eISSN： 2191-4281
Symmetry in the self-organized criticality Peer-reviewed

K. Nanjo, H. Nagahama, E. Yodogawa

ISIS- Symmetry　302-305　2004/12
Curie symmetry principle in nonlinear functional analysis Peer-reviewed

T. Chiba, H. Nagahama

ISIS- Symmetry　298-301　2004/12
Electric-discharge luminescence between frictional natural quartz by pin-on-disk method: Possible origin of seismo-electromagnetic radiation Peer-reviewed

J. Muto, H. Nagahama, T. Miura, I. Arakawa

EOS Trans AGU　85 (47)　Abstract T51B-0446　2004/12
Frictional melting can terminate seismic slips: Experimental results of stick-slips Peer-reviewed

Y Koizumi, K Otsuki, A Takeuchi, H Nagahama

GEOPHYSICAL RESEARCH LETTERS　31　(21)　L21605, doi:10.1029/2004GL0206　2004/11

DOI： 10.1029/2004GL020642 　

ISSN： 0094-8276

eISSN： 1944-8007
Micromorphic continuum with defects and lattice preferred orientation: Application to seismic anisotropy in polycrystals Peer-reviewed

J. Muto, Y. Kawada, H. Nagahama

Workshop on "Probing Earth Media Having Small-Scale Heterogeneities" Proceedings (Aoba Memorial Hall, Tohoku Univ., Sendai, Japan, 22-23 November, 2004)　58-61　2004/11
Seismic ray path in anisotropic medium based on higher-order geometry Peer-reviewed

T. Yajima, H. Nagahama

Workshop on "Probing Earth Media Having Small-Scale Heterogeneities" Proceedings (Aoba Memorial Hall, Tohoku Univ., Sendai, Japan, 22-23 November, 2004)　62-65　2004/11
Infrared lattice vibrational modes and hydrolytic weakening of dynamically recrystallized quartz Peer-reviewed

J. Muto, H. Nagahama, T. Hashimoto

2nd International workshop on Water Dynamics　97-100　2004/11
Strain weakening of nature recrystallized quartz by hydrous point defects Invited Peer-reviewed

J. Muto, H. Nagahama, T. Hashimoto

Gordon Research Conference, The Role of Water in Rock Deformation. Mount Holyoke College, South Hadley, Massachusetts　2004/08
TL property of quartz grain surface Peer-reviewed

A. Takeuchi, H. Nagahama, T. Hashimoto

The Thermoluminescence and Optically Stimulated Laboratory and the Department of Earth Sciences, Dalhousie University are pleased to sponsor the 3rd New World Luminescence Dating Workshop, July 4 - 7, 2004, Department of Earth Sciences, Dalhousie Universi　35　2004/07
Scaling laws between seismo-electric/magnetic fields and earthquake magnitude Peer-reviewed

A Takeuchi, H Nagahama

TERRA NOVA　16　(3)　152-156　2004/06

DOI： 10.1111/j.1365-3121.2004.00546.x 　

ISSN： 0954-4879
Viscoelastic behaviour and temporal fractal properties of lherzolite and marble: possible extrapolation from experimental results to the geological time-scale Peer-reviewed

Y Kawada, H Nagahama

TERRA NOVA　16　(3)　128-132　2004/06

DOI： 10.1111/j.1365-3121.2004.00540.x 　

ISSN： 0954-4879
Viscoelastic relaxation behaviours and temporal fractal properties for rocks and clays Peer-reviewed

Y. Kawada, H. Nagahama

Symposium Tectonics on Human Time Scales June 1 to 4, 2004 organized by Collaborative Research Center SFB 526 "Rheology of the Earth" at Ruhr-University Bochum and the Deformation and Rheology Group at GeoForschungs Zentrum Potsdam, Sprockhovel, Germany,　171　2004/06
The mechanical phase transition for viscoelastic relaxation behavior of rocks: introducing “free-space volume for solids” Peer-reviewed

Y. Kawada, H. Nagahama, H. Hara

The 4th International Conference "Fractals and Dynamic Systems in Geoscience", Book of abstracts　47　2004/05
課題１. 環境放射線を測る Invited Peer-reviewed

N. Iwasa, H. Nagahama

東北大学全学教育科目テキスト・自然科学総合実験2004、東北大学自然科学総合実験テキスト編集委員会（編）、東北大学出版会、仙台　11-32　2004/04
P-120 Infrared Vibrational Modes and Hydrolytic Weakening of Recrystallized Quartz

MUTO Jun, NAGAHAMA Hiroyuki, HASHIMOTO Tetsuo

Annual Meeting of the Geological Society of Japan　2004　219-219　2004
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2004.abst.0_219_2 　
P-141 KDM Equation and Breaking of Symmetrical Principle

CHIBA Tomoaki, NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　2004　230-230　2004
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2004.abst.0_230_1 　
O-130 Seismic Ray Theory and Finsler Geometry

NAGAHAMA Hiroyuki, MUTO Jun, KAWADA Yusuke, YAJIMA Takahiro

Annual Meeting of the Geological Society of Japan　2004　90-90　2004
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2004.abst.0_90_2 　
O-129 Viscoelastic relaxation behaviors for rocks and clays and their phase transition model

Kawada Yusuke, Nagahama Hiroyuki, Hara Hiroaki

Annual Meeting of the Geological Society of Japan　2004　90-90　2004
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2004.abst.0_90_1 　
Fractal properties of spatial distributions of aftershocks and active faults Peer-reviewed

K Nanjo, H Nagahama

CHAOS SOLITONS & FRACTALS　19　(2)　387-397　2004/01

DOI： 10.1016/S0960-0779(03)00051-1 　

ISSN： 0960-0779

eISSN： 1873-2887
Dielectric anisotropy and deformation of crustal rocks: physical interaction theory and dielectric mylonites Peer-reviewed

J Muto, H Nagahama

PHYSICS OF THE EARTH AND PLANETARY INTERIORS　141　(1)　27-35　2004/01

DOI： 10.1016/j.pepi.2003.09.009 　

ISSN： 0031-9201
Surface electrification of rocks and charge trapping centers Peer-reviewed

A Takeuchi, H Nagahama, T Hashimoto

PHYSICS AND CHEMISTRY OF THE EARTH　29　(4-9)　359-366　2004

DOI： 10.1016/j.pce.2003.09.016 　

ISSN： 1474-7065

eISSN： 1873-5193
Charge releasing of charge trapping center on milled quartz grains Peer-reviewed

A. Takeuchi, H. Nagahama, T. Hashimoto

EOS Trans. AGU, 84 (46)　T51E-0201 0830h　2003/12
New micro-IR spectroscopic mapping: Application to natural quartz Peer-reviewed

J. Muto, H. Nagahama, T. Hashimoto

First International Meeting on Applied Physics (APHYS-2003) Badajoz (Spain), Book of Abstract　796　2003/08
Symmetropy, earthquakes and SOC: A quantitative measure to monitor anisotropy and entropic heterogeneity Peer-reviewed

K.Nanjo, H. Nagahama, E. Yodogawa

IUGG2003 International Association of Seismology and Physics of the Earth's Interior Hagiwara Symposium on Monitoring and Modeling of Earthquakes and Volcanic Processes for Prediction Development of various monitoring system, XXIII General assembly of the　2003/07
Fabric transitions of Quartz C-axis: Influence of hydrogen defects Peer-reviewed

J. Muto, H. Nagahama, T. Hashimoto

JSS05 Physics and Chemistry of Earth Materials (IASPEI, IAVCEI, IAGA) XXIII General assembly of the International Union of Geodesy and Geophysics in Sapporo, Japan from June 30-July 11, 2003 (IUGG2003), Abstracts week A　A178-179, JSS05/03P/A04-006　2003/07
Thermorheological constitutive flow laws for rocks with transient behavior Peer-reviewed

Y. Kawada, H. Nagahama

JSS05 Physics and Chemistry of Earth Materials (IASPEI, IAVCEI, IAGA) XXIII General assembly of the International Union of Geodesy and Geophysics in Sapporo, Japan from June 30-July 11, 2003 (IUGG2003)　Abstract (Week A)　A.182　2003/07
Disappearance of Al-hole center in surface disordered layer of quartz particles Peer-reviewed

A. Takeuchi, H. Nagahama, T. Hashimoto

JSS05 Physics and Chemistry of Earth Materials (IASPEI, IAVCEI, IAGA) XXIII General assembly of the International Union of Geodesy and Geophysics in Sapporo, Japan from June 30-July 11, 2003 (IUGG2003), Abstracts (week A).　A.178　2003/07
Fractal dimensions of recrystallized quartz grain boundaries and grain fabrics Peer-reviewed

M Takahashi, H Nagahama

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING　28　(1C)　213-221　2003/06

ISSN： 0377-9211
Fabric transitions of quartz C-axis induced by hydrogen defects Peer-reviewed

J. Muto, H. Nagahama, T. Hashimoto

Geophysical Research Abstract　08040　2003/04
A high-temperature viscoelastic constitutive law for rocks with transient behavior Peer-reviewed

Y. Kawada, H. Nagahama

Geophysical Research Abstract　5　08126　2003/04
Fractal dimensions of recrystallized quartz grain boundaries and grain fabrics

Miki Takahashi, Hiroyuki Nagahama

Arabian Journal for Science and Engineering　28　(1 C)　213-221　2003
Publisher: King Fahd University of Petroleum and Minerals
ISSN： 2191-4281 2193-567X
Cathodoluminescence and Micro-IR Spectroscopic Observations : Hydrogen Mapping in Recrystallized Quartz

MUTO Jun, NAGAHAMA Hiroyuki, HASHIMOTO Tetsuo

Annual Meeting of the Geological Society of Japan　2003　252-252　2003
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2003.0_252_2 　
Physical Properties and Finsler Geometry of Anisotropic Medium

NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　2003　116-116　2003
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2003.0_116_2 　
Fractal structures of spatial distributions of aftershocks and active faults Peer-reviewed

K. Nanjo, H. Nagahama

Geophysical Research Abstract　5　01693　2003
Fractal properties of dynamic recrysatallized grain boundaries Invited Peer-reviewed

M Takahashi, H Nagahama

THERMEC'2003, PTS 1-5　426-4　3563-3568　2003

ISSN： 0255-5476
A deformed medium including a defect field and differential forms Peer-reviewed

K Yamasaki, H Nagahama

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL　35　(16)　3767-3778　2002/04

ISSN： 0305-4470
Interpretation of charging on fracture or frictional slip surface of rocks Peer-reviewed

A Takeuchi, H Nagahama

PHYSICS OF THE EARTH AND PLANETARY INTERIORS　130　(3-4)　285-291　2002/04

DOI： 10.1016/S0031-9201(02)00013-4 　

ISSN： 0031-9201

eISSN： 1872-7395
O-239 Surface charge induced by stick-slip of granites

Nagahama Hiroyuki, Takeuchi Akihiro

Annual Meeting of the Geological Society of Japan　2002　118-118　2002
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2002.0_118_1 　
O-241 Group theoretical classification of crack patterns

CHIBA Tomoaki, NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　2002　119-119　2002
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2002.0_119_1 　
O-240 Dielectric anisotropy and deformation of crustal rocks by the differential geometric theory of the physical interaction field

MUTO Jun, NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　2002　118-118　2002
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2002.0_118_2 　
Hodge duality of defects field and operators in differential forms Peer-reviewed

K. Yamasaki, H. Nagahama

Journal of Physics, A: Mathematics and General　35　3767-3778　2002
Tribochemical wearing in S-C mylonites and its implication to lithosphere stress level Peer-reviewed

N Nakamura, H Nagahama

EARTH PLANETS AND SPACE　54　(11)　1103-1108　2002

DOI： 10.1186/BF03353309 　

ISSN： 1880-5981
Surface charging mechanism and scaling law related to earthquakes Peer-reviewed

A. Takeuchi, H. Nagahama

Journal of Atmospheric Electricity　22　183-190　2002
Radiation charactaristics and scaling law of seismo-electric field Peer-reviewed

A Takeuchi, H Nagahama

2002 3RD INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY　5-8　2002

DOI： 10.1109/ELMAGC.2002.1177346 　
Tectono and chemico-magnetic effects in tectonically active regions Peer-reviewed

Nakamura, N, Nagahama, H

Earthquake Termodynamics and Phase Transformations in the Earth's Interior (Eds. R. Teisseyre and E. Majewski), Academic Press　553-564　2001/12

DOI： 10.1016/S0074-6142(01)80100-5 　
The sections' fractal dimension of grain boundary Peer-reviewed

M Takahashi, H Nagahama

APPLIED SURFACE SCIENCE　182　(3-4)　297-301　2001/10

DOI： 10.1016/S0169-4332(01)00417-2 　

ISSN： 0169-4332
Application of Fractal Cell Dynamics Model to the Recrystallized Grain Boundaries Invited Peer-reviewed

M. Takahashi, H, Nagahama

International Workshop on Nano-materials　33　2001/10
Voltage changes induced by stick-slip of granites Peer-reviewed

A Takeuchi, H Nagahama

GEOPHYSICAL RESEARCH LETTERS　28　(17)　3365-3368　2001/09

DOI： 10.1029/2001GL012981 　

ISSN： 0094-8276

eISSN： 1944-8007
Changes in magnetic and fractal properties of fractured granites near the Nojima Fault, Japan Peer-reviewed

N Nakamura, H Nagahama

ISLAND ARC　10　(3-4)　486-494　2001/09

DOI： 10.1046/j.1440-1738.2001.00347.x 　

ISSN： 1038-4871
O-197 Geometrical Background of the Incompatible Deformation Caused by the Inner-rotation : Micromorphic Continuum

NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　2001　98-98　2001
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2001.0_98_2 　
Seismic Rotation Waves : Dislocations and Disclinations in a Micromorphic Continuum Peer-reviewed

H. Nagahama, R. Teisseyre

Acta Geophisica・Polonica　49　(1)　119-129　2001
Seismic rotation waves: dislocations and disclinations in a micromorphic continuum Peer-reviewed

H. Nagahama, R. Teisseyre

Acta Geophysica Polonica　49　(1)　119-129　2001
Gauge theory of dislocational electromagnetic field in earthquake preparation zone Peer-reviewed

H. Nagahama

Acta Geophysica Polonica　49　(3)　437-448　2001
Curie symmetry principle in nonlinear functional systems Peer-reviewed

T. Chiba, H. Nagahama

Forma　16　(3)　225-231　2001

ISSN： 0911-6036
Symmetropy and self-organized criticality Peer-reviewed

K. Nanjo, H. Nagahama, E. Yodogawa

Forma　16　(3)　213-224　2001

ISSN： 0911-6036
Symmetry in the self-organized criticality Peer-reviewed

K. Nanjo, H. Nagahama, E. Yodogawa

5th Congress & Exhibition ISIS-Symmetry, July, Sydney, Australia, http://www.isis-s.unsw.edu.au/interact/conference/abstracts-index.html.　2001
Sattinger's group theoretical bifurcation theory: Curie symmetry principle Peer-reviewed

T. Chiba, H. Nagahama

5th Congress & Exhibition ISIS-Symmetry, July, Sydney, Australia, http://www.isis-s.unsw.edu.au/interact/conference/abstracts-index.html.　2001
Voltage-changes induced by stick-slips of granites. Peer-reviewed

A. Takeuchi, H. Nagahama

2001 Asia-Pacific Radio Science Conference, AP-RASC'01, Chuo Univ., Tokyo, Japan, PG9-04.　361　2001
Flow and slips in S-C mylonites: geological implication of seismogenetic processes Peer-reviewed

N. Nakamura, H. Nagahama

International Symposium on Slip and Flow Processes in and below the Seismogenic Region, Nov. 5-8, 2001, Saito Ho-on Kaikan Hall, Aoba-ku, Sendai, Japan, Ministry of Education, Culture, Sports, Science and Technology　68-1-68-7　2001
Observed correlations between aftershock spatial distribution and earthquake fault lengths Peer-reviewed

K Nanjo, H Nagahama

TERRA NOVA　12　(6)　312-316　2000/12

DOI： 10.1046/j.1365-3121.2000.00329.x 　

ISSN： 0954-4879
Electric Potential Changes Induced by Stick-slips of Granites Peer-reviewed

A. Takeuchi, H. Nagahama

International Workshop, Seismo Electromagnetics 2000 of NASDA, Programme and Abstracts　21　2000/08
A Gauge Theory of Dislocations Extended by Including the Electronic Fields : Electromagnetic Generation in Earthquake Preparation Zone Peer-reviewed

H. Nagahama

International Workshop Seismo Electromagnetics 2000 of NASDA, Programme and Abstracts　120　2000/08
Fractal grain boundary migration Peer-reviewed

M Takahashi, H Nagahama

FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY　8　(2)　189-194　2000/06

ISSN： 0218-348X
Spatial distribution of aftershocks and the fractal structure of active fault systems Peer-reviewed

K Nanjo, H Nagahama

PURE AND APPLIED GEOPHYSICS　157　(4)　575-588　2000/04

DOI： 10.1007/PL00001108 　

ISSN： 0033-4553

eISSN： 1420-9136
Fractal Scalings of Rock Fragmentation Peer-reviewed

H. Nagahama

Earth Science Frontiers　7　(1)　169-177　2000/04
Micromorphic continuum and fractal fracturing in the lithosphere Peer-reviewed

H Nagahama, R Teisseyre

PURE AND APPLIED GEOPHYSICS　157　(4)　559-574　2000/04

DOI： 10.1007/PL00001107 　

ISSN： 0033-4553
O-231 Finsler Geometry of Plastic Structures of Geomagnetic Materials

NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　2000　126-126　2000
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2000.0_126_2 　
O-230 Deformation of Crust-Material Space with Fault (Defect) Fields and its Hodge Duality : Basic Theory

YAMASAKI Kazuhito, NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　2000　126-126　2000
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2000.0_126_1 　
Anisotropic Shapes of Islands and Species Richness of Land Snail Fauna of the Ryukyus Peer-reviewed

K. Yamasaki, S. Chiba, H. Nagahama

Tropics　10　(1)　93-101　2000
Publisher:
DOI： 10.3759/tropics.10.93 　

ISSN： 0917-415X
Symmetry Properties of Spatial Distribution of Microfracturing in Rock Peer-reviewed

K. Nanjo, H. Nagahama, E. Yodogawa

Forma　15　(1)　95-101　2000

ISSN： 0911-6036
Curie Symmetry Principle : Dose It Constraint the Analysis of Structural Geology? Peer-reviewed

N. Nakamura, H. Nagahama

Forma　15　(1)　87-94　2000

ISSN： 0911-6036
Geometrical effect of island shape on the species richness Peer-reviewed

K Yamasaki, S Chiba, H Nagahama

FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY　7　(4)　353-357　1999/12

ISSN： 0218-348X

eISSN： 1793-6543
Hodge duality and continuum theory of defects Peer-reviewed

K Yamasaki, H Nagahama

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL　32　(44)　L475-L481　1999/11

DOI： 10.1088/0305-4470/32/44/103 　

ISSN： 0305-4470
Symmetry of Spatial Distribution of Fracturing in Rock Peer-reviewed

K. Nanjo, H. Nagahama, E. Yodogawa

The International Katachi U Symmetry 2 Symposium, Tsukuba, abstract　55　1999/09
Is Curie Symmetry Principle Constraint for Structural Geology Peer-reviewed

N. Nakamura, H. Nagahama

The International Katachi U Symmetry 2 Symposium, Tsukuba, abstract　54　1999/09
New Nature of Aftershock Spatial Distribution, Earthquake Fault Lengths and Secondary Disaster Prevention Peer-reviewed

K. Nanjo, H. Nagahama

IUGG 99, Birmingham abstracts A　153　1999/04
Gauge theory of faults

NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　1999　77-77　1999
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1999.0_77_1 　
Differential Geometric Structure of Rock Deformation with Internal Rotation

YAMAZAKI Kazuhito, NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　1999　76-76　1999
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1999.0_76_2 　
Continuum Theory of Defects and Gravity Anomaly Peer-reviewed

K. Yamasaki, H. Nagahama

Acta Geophysicae Polonica　47　(3)　239-257　1999
Micro-inertia Continuum : Rotations and Semi-waves Peer-reviewed

R. Teisseyre, H. Nagahama

Acta Geophysica Polonica　47　(3)　259-272　1999
Fault Zone Magnetism and Fractal Fracture Distribution : A Case Study of the Drilling Project in Nojima Earthquake Fault Peer-reviewed

N. Nakamura, H. Nagahama

AGU Fall Meeting at San Francisco December　6-10　1998/12
Species-area Relation for Anisotropic Island Peer-reviewed

K. Yamasaki, S. Chiba, H. Nagahama

Programme and Abstract of an International Symposium "The Ryuku Islands"　35-38　1998/10
１９９８年９月３日岩手県内陸北部の地震に伴う地震断層 Peer-reviewed

越谷信, 大石雅之, 野田賢, 奥寺勇樹, 加藤貴史, 滝口真一, 三田地喜之, 嶋守真紀, 斎藤徳美, 矢内桂三, 平野信一, 澤祥, 福留高明, 佐藤比呂志, 大槻憲四郎, 長濱裕幸, 中村教博, 土井宣夫, 東郷正美, 粟田泰夫, 吉岡敏和

Active fault research　17　(17)　9-20　1998/09
Publisher: Japanese Society for Active Fault Studies
DOI： 10.11462/afr1985.1998.17_9 　

ISSN： 0918-1024

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The Iwate-ken Nairiku-hokubu earthquake of September 3,1998, caused surface rupture on the Shinozaki fault, at Shizukuishi, Iwate Prefecture, northeast Japan. The fault, dipping to the west and northwest, was traced about 800 m along strike. Reverse slip produced vertical displacement of 0.25-0.32 m. Landslides and building damage occurred in the northern and northwestern area of the fault. The southern part of the fault dovetails with the northern part of the previously mapped Nishine fault
Geomagnetic field perturbation and fault creep motion: A new tectonomagnetic model Peer-reviewed

Nakamura, N, Nagahama, H

In: Atomospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquakes (Ed. M. Hayakawa), TERRAPUB　307-323　1998/09
Rates of aftershock decay and the fractal structure of active fault systems Peer-reviewed

K Nanjo, H Nagahama, M Satomura

TECTONOPHYSICS　287　(1-4)　173-186　1998/03

DOI： 10.1016/S0040-1951(98)80067-X 　

ISSN： 0040-1951
In Curie symmetry principle constraint for structural geology?

NAKAMURA NORIHIRO, NAGAHAMA HIROYUKI

Annual Meeting of the Geological Society of Japan　1998　276-276　1998
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1998.0_276 　
断層破砕帯近傍の岩石磁気特性～野島断層500ｍコアの帯磁率異方性と割れ目のフラクタル特性

中村教博, 長濱裕幸

月刊地球号外「断層解剖計画」　(21)　196-201　1998
Publisher:
ISSN： 0916-9733
A Fractal Analysis for Experimentally Deformed Quartz Grain and Strain Rate Meter Peer-reviewed

M. Takahashi, H. Nagahama

Journal of Structural Geology　20　(2-3)　269-275　1998

DOI： 10.1016/S0191-8141(97)00072-2 　
Thermodynamics of Line Defects and Transient Electric Current : Electromagnetic Field Generation in Earthquake Preparation Zone Peer-reviewed

H. Nagahama, R. Teisseyre

Acta Geophysica Polonica　46　(1)　35-54　1998
Dislocation Field Evolution and Dislocation Source/Sink Function Peer-reviewed

R. Teisseyre, H. Nagahama

Acta Geophysica Polonica　46　(1)　13-33　1998
On the Magnetic Properties of 500m Core Samples from Nojima Fault : The Relation between Fault Distances and Rock Magnetic Susceptibility Peer-reviewed

N. Nakamura, H. Nagahama

Chiku Monthly　20　196-201　1998
Micromorphic Continuum, Rotational Wave and Fractal Properties of Earthquakes and Faults Peer-reviewed

H. Nagahama, R. Teisseyre

Acta Geophysica Polonica　46　(3)　277-294　1998
Earthquake Fault Associated with the Earthquake in the Island Area of Northern Iwate Prefecture, September 3,1998 Peer-reviewed

越谷信, 野田賢, 加藤貴史, 滝口真一, 三田地喜之, 嶋守真紀, 斎藤徳美, 矢内桂三, 大石雅之, 福留高明, 佐藤比呂志, 大槻憲四郎, 長濱裕幸, 中村教博, 平野信一, 土井宣夫, 澤祥, 東郷正美, 粟田泰夫, 吉岡敏和

地質学雑誌　104　(11)　XXV-XXVI　1998
Publisher: The Geological Society of Japan
DOI： 10.5575/geosoc.104.XXV 　

ISSN： 0016-7630
Fault zone magnetism and fractal fracture distribution: A case study of the drilling project in Nojima Earthquake Fault. Peer-reviewed

Norihiro Nakamura, H. Nagahama

AGU Fall Meeting at San Francisco, 6-10 December, 1998　1998
Geomagnetic Field Anomaly and Fault Creep Motion-A Differential Geometrical Approach Peer-reviewed

N. Nakamura, H. Nagahama

Abstract of International Workshop Seismo Electromagnetics, Japan　135　1997/08
Fractal Grain Boundaries of Recrystallized Quartz and Strain Rate Meter Peer-reviewed

M. Takahashi, H. Nagahama

3rd International Symposium on Fractal and Dynamic Systems in Geoscience, Book of abstract, slovakia　87　1997/04
Self-affinity and Repeat Time of Earthquakes Peer-reviewed

H. Nagahama

3rd International Symposium on Fractal and Dynamic Systems in Geoscience, Book of abstract slovakia　57　1997/04
Aftershock Relaxation and Fractal Structure of Active Fault Systems Peer-reviewed

K. Nanjo, H. Nagahama

3rd International Symposium on Fractal and Dynamic Systems in Geoscience, Book of abstracts　58　1997/04
Magnetic Susceptibility and Plastic Strain of Rocks by the Theory of the Physical Interaction Field Peer-reviewed

N. Nakamura, H. Nagahama

Physics and Chemistry of the Earth　22　(1-2)　167-173　1997

DOI： 10.1016/S0079-1946(97)00097-9 　
Anisotropy of Magnetic Susceptibility and Plastic Strain of Rocks by Finsler Geometry Peer-reviewed

N. Nakamura, H. Nagahama

Acta Geophysica Polonica　45　(4)　333-354　1997
Gravity Anomaly and Collective Property of Active Faults Peer-reviewed

K. Yamasaki, H. Nagahama

Annales Geophysicae, Supplement1　15　(1)　C136　1997
A spring-network model of fault system evolution Peer-reviewed

N. Nakamura, K. Otsuki, H. Nagahama

In: Structural geology and Personal Computers (ed. D. D. Paor), Elsevier Science Pub　343-358　1996/08

DOI： 10.1016/S1874-561X(96)80029-0 　
Scaling of the Critical Slip Displacement and Fractal Theory on Energy-Size Reduction in Fault Zones Peer-reviewed

H. Nagahama, N. Nakamura

30th International Geological Congress, Abstracts　2-3　272　1996/08
Numerical Simulation for the Pattern Formation of Faults Invited

N. Nakamura, H. Nagahama

30th International Geological Congress Abstracts　3-3　469　1996/08
A Fractal Shape of Recrystallized Quartz Grains and Strain Rate Meter Peer-reviewed

M. Takahashi, H. Nagahama, T. Masuda, A. Fujimura

30th International Geological Congress, Abstract　2-3　273　1996/08
Rock Fracturing and Exoelectrons

H. Nagahama

News Letter, Emphasis Research "Fractal and Pumping-up"　(10)　8-12　1996/04
Non-Riemannian and fractal geometries of fracturing in geomaterials Peer-reviewed

H Nagahama

GEOLOGISCHE RUNDSCHAU　85　(1)　96-102　1996/03

DOI： 10.1007/s005310050057 　

ISSN： 0016-7835
324 Non-Riemannian and fractal damage mechanics of geomaterials

NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　1996　253-253　1996
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1996.0_253_1 　
325 Differential geometric approach to the relationship between magnetic susceptibility and plastic strain of deformed rocks

NAKAMURA NORIHIRO, NAGAHAMA HIROYUKI

Annual Meeting of the Geological Society of Japan　1996　253-253　1996
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1996.0_253_2 　
326 Differential geomety of gravity change caused by fault motion

YAMASAKI Kazuhito, NAGAHAMA Hiroyuki

Annual Meeting of the Geological Society of Japan　1996　254-254　1996
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1996.0_254_1 　
Magnetic Susceptibility and Plastic Strain of Rocks by the Theory of the Physical Interaction Field Peer-reviewed

N. Nakamura, H. Nagahama

Annales Geophysicae　14　(1)　C152　1996
Fracturing in the Solid Earth (1) Peer-reviewed

H. Nagahama

Traslated World Seismology　(2)　82-89　1995/04
Fracturing in the Solid Earth (2) Peer-reviewed

H. Nagahama

Translated World Seismology　(3)　83-89　1995/04
Dose Earthquake Break out Irregularly ? Collective and Individual Characters of Earthquakes. Peer-reviewed

K. Shimazaki, H. Nagahama

Kagaku (Sciences), Iwanami Shoten　65　(4,241-244 248-256)　1995/04
Non-Riemannian and Fractal Damage Mechanics of Geomaterials Peer-reviewed

H. Nagahama

2nd International Symposium on Fractal and Dynamic Systems in Geoscience, Book of abstract, Germany　50　1995
HIGH-TEMPERATURE VISOELASTIC BEHAVIOUR AND LONG TIME TAIL OF ROCKS Peer-reviewed

H NAGAHAMA

FRACTALS AND DYNAMIC SYSTEMS IN GEOSCIENCE　121-129　1994
APPLICATION OF THE PI-THEOREM TO THE WEAR RATE OF GOUGE FORMATION IN FRICTIONAL SLIDING OF ROCKS Peer-reviewed

H NAGAHAMA, N NAKAMURA

PURE AND APPLIED GEOPHYSICS　142　(3-4)　795-808　1994

DOI： 10.1007/BF00876065 　

ISSN： 0033-4553
An Application of Dimension Analysis to the Characterization of Rock Wearing Peer-reviewed

H. Nagahama, N. Nakamura

Structural Geology　39　(39)　119-123　1994
Further Analysis of Clast-size Distribution in Pseudotachylytes : Implications for the Origin of Pseudotachylytes Peer-reviewed

H. Nagahama, T. Shimamoto, Y. Ohtomo, A. Lochohead

Structural Geology　39　(39)　43-49　1994
A fractal criterion for ductile and brittle fracture Peer-reviewed

Hiroyuki Nagahama

Journal of Applied Physics　75　(6)　3220-3222　1994

DOI： 10.1063/1.356128 　

ISSN： 0021-8979
SELF-AFFINE GROWTH-PATTERN OF EARTHQUAKE RUPTURE ZONES Peer-reviewed

H NAGAHAMA

PURE AND APPLIED GEOPHYSICS　142　(2)　263-271　1994

DOI： 10.1007/BF00879303 　

ISSN： 0033-4553
FRACTAL FRAGMENT SIZE DISTRIBUTION FOR BRITTLE ROCKS Peer-reviewed

H NAGAHAMA

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS　30　(4)　469-471　1993/08

DOI： 10.1016/0148-9062(93)91728-2 　

ISSN： 0148-9062
FRACTAL DIMENSION AND FRACTURE OF BRITTLE ROCKS Peer-reviewed

H NAGAHAMA, K YOSHII

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS　30　(2)　173-175　1993/04

DOI： 10.1016/0148-9062(93)90710-U 　

ISSN： 0148-9062
MAXIMUM-ENTROPY AND SHEAR STRAIN OF SHEAR ZONE Peer-reviewed

H NAGAHAMA

MATHEMATICAL GEOLOGY　24　(8)　947-955　1992/11

DOI： 10.1007/BF00894660 　

ISSN： 0882-8121
AN ARGUMENT AGAINST THE CRUSH ORIGIN OF PSEUDOTACHYLYTES BASED ON THE ANALYSIS OF CLAST-SIZE DISTRIBUTION Peer-reviewed

T SHIMAMOTO, H NAGAHAMA

JOURNAL OF STRUCTURAL GEOLOGY　14　(8-9)　999-1006　1992/08

ISSN： 0191-8141
Further Analysis of Clast-size Distribution in Pseudotachylytes : Implication for Their Origin Peer-reviewed

H. Nagahama, T. Shimamoto, A. Lin, H. Sato, A. Tsutsumi, Y. Ohotomo, N. Shigematsu, T. Watanabe, K. Kanagawa

29th International Geological Congress, Abstracts　1　(3)　169　1992/08
The Wear Processs in Rocks during Frictional Sliding Peer-reviewed

H. Nagahama, T. Shimamoto

29th International Geological Congress, Abstracts　1　(3)　170　1992/08
255 Self-affine Growth of River Networks along Active Fault

Fuchigami Naomi, Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1992　363-363　1992
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1992.0_363 　
256 Thickness and Displacement of Shear Zones

Nakamura Norihiro, Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1992　364-364　1992
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1992.0_364 　
254 Fractal Structure of Fault Systems in Japan

Yoshii Kyoko, Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1992　362-362　1992
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1992.0_362 　
253 High Temperature Viscoelastis Behavior and Long Time Tail of Rocks

Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1992　361-361　1992
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1992.0_361 　
II-5 Scaling and Rock Mechanics

Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1992　88-89　1992
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1992.0_88 　
Scaling Laws of Rock Fragments Peer-reviewed

H. Nagahama

Chikyu Monthly　14　(10)　611-615　1992
Fracturing in the Solid Earth Peer-reviewed

H. Nagahama

Science Report, Tohoku University, Sendai, Second Series. (Geology)　61　(2)　103-126　1991/03
Intrafault Materials and Fractals -Grain-Size Distribution and Grain Surface Area- Peer-reviewed

H. Nagahama

Structural Geology　37,31-39　(37)　31-39　1991
The Origin of Pseudotachylytes and the State-of-stress Problems. Peer-reviewed

T. Shimamoto, H. Nagahama

Chikyu Monthly　13　(6)　416-427　1991
Growth Pattern of Pull-apart Basin Peer-reviewed

H. Nagahama

Structural Geology　36,47-52　1991
Fractures and Fractals Peer-reviewed

H. Nagahama

Mathematical Seismology　24　(5)　228-246　1990/03
223 Self-affinity of fault geometry : On the relation between fault areas and fault lengths

Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1990　358-358　1990
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1990.0_358 　
Behavoir and Fractal Geometry of Multiscale Fault System

Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1989　429-429　1989
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1989.0_429 　
Orthoquartzite Fragments in the Miocene Sedimentary Section in Minakami District, North Gunma Prefecture. Peer-reviewed

M. Takahashi, H, Nagahama, Y. Tanaka

Earth Sciene (Chikyu Kagaku)　43　(5)　290-296　1989
Publisher: The Association for the Geological Collaboration in Japan
DOI： 10.15080/agcjchikyukagaku.43.5_290 　

ISSN： 0366-6611

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Orthoquartzite fragments were firstly found from Miocene formation overlying Joetsu metamorphic rocks in Minakami district. The conglomerate which yields these orthoquartzite fragments is mostly composed of sandstone fragments, but those of shale hornfels, chert, felsic rocks, altered dacitic rocks, altered basalt and crystalline schist are included. In spite of the durable lithology, the orthoquartzite fragments posses a high roundness (0.34〜0.73) in comparison with the other fragments. This indicates that they are reworked fragments from pre-Neogene formations. The Tokurazawa Formation distributed in the Joetsu district is one of probable source of these orthoquartzite fragments, because many orthoquartzite fragments have been found from the Lower Cretaceous Tetori Group with which the Tokurazawa Formation is a correlative.
Age of the Lower Part of Neogene Sedimentary Rocks in the Chichibu Basin, as Dated by Calcareous Nannofossils Peer-reviewed

NAGAHAMA Hiroyuki

Fossils　46,1-9　(46)　1-9　1989
Geometry and Geological Significance of "Vein structure" in Soft Sediment Peer-reviewed

S. Saneatsu, H. Nagahama

Structural Geology　34,27-35　1989
392 Geometry of shear zone

Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1988　496-496　1988
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1988.0_496 　
Structural analysis of deformation in the northeasten Kyushu of the Shimanto Belt : in the case of Mikado district.

Nagahama Hiroyuki

Annual Meeting of the Geological Society of Japan　1987　558-558　1987
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.1987.0_558 　
The Ryoke Belt in Hiki Hills, Northeastern Marginal Area of the Kanto Mountains Peer-reviewed

H. Takagi, H. Nagahama

The Journal of the Geological Society of Japan　93　(3)　201-215　1987
Publisher: The Geological Society of Japan
DOI： 10.5575/geosoc.93.201 　

ISSN： 0016-7630
マイロナイトの小構造により推定される剪断帯の運動像 : 長野県高遠地域の例 : 構造地質

長浜裕幸, 高木秀雄

日本地質学会学術大会講演要旨　1985　494-494　1985
Publisher: 日本地質学会
DOI： 10.14863/geosocabst.1985.0_494

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Misc. 48

To the Obituary of Professor Roman Teisseyre Invited Peer-reviewed

Publications of the Institute of Geophysics, Polish Academy of Sciences; Geophysical Data Bases, Processing and Instrumentation　446　(A-32)　2023/12/07
Publisher: Institute of Geophysics Polish Academy of Sciences
DOI： 10.25171/instgeoph_pas_publs-2023-016 　

ISSN： 2544-428X

eISSN： 2299-8020
フェーズフィールド法によるゲルマニウムかんらん石の相転移シミュレーション Peer-reviewed

澤燦道、武藤潤、長濱裕幸　2022/11/16
東北大学保健学科における総合選抜の評価ー看護学専攻の『AO入試Ⅱ期』についてー

宮本友弘, 久保沙織, 尾崎章子, 宮下光令, 倉元直樹, 長濱裕幸

令和４年度全国大学入学者選抜研究連絡協議会大会（第１７回）研究発表予稿集　37-41　2022/05
新学習指導要領の下での大学入試‐高校調査から見えてきた課題ー

倉元直樹, 宮本友弘, 久保沙織, 長濱裕幸

令和４年度全国大学入学者選抜研究連絡協議会大会（第１７回）研究発表予稿集　60-65　2022/05
東北大学志望を促進する要因の検討- 新入学者アンケートから- Peer-reviewed

宮本友弘, 久保沙織, 倉元直樹, 長濱裕幸

令和3年度全国大学入学者選抜研究連絡協議会大会（第16回）研究発表予稿集（オープンセッション用）　192-197　2021/05
COVID－19蔓延下における個別大学の入試に関する高校側の意見 Peer-reviewed

倉元直樹, 宮本友弘, 長濱裕幸

令和3年度全国大学入学者選抜研究連絡協議会大会（第16回）研究発表予稿集（オープンセッション用）　7-12　2021/05
大学入試英語問題における設問形式による識別力比較―英文和訳・和文英訳は大学入試で選抜機能を果たしているか― Peer-reviewed

秦野進一, 倉元直樹, 長濱裕幸

令和2年度全国大学入学者選抜研究連絡協議会大会（第15回）研究発表予稿集（クローズドセッション用）　27-32　2020/05
東北大学志願者の学力水準の経年分析―過去3年間の大学入試センター試験成績から― Peer-reviewed

宮本友弘, 庄司強, 倉元直樹, 長濱裕幸

令和2年度全国大学入学者選抜研究連絡協議会大会（第15回）研究発表予稿集（クローズドセッション用）　19-24　2020/05
2021年度東北大学入試の予告に対する高校側の評価— 「受験生保護の大原則」の観点から— Peer-reviewed

倉元直樹, 長濱裕幸

全国大学入学者選抜研究連絡協議会第14 回大会研究発表予稿集　39-44　2019/05
Airborne radon concentration measurements using gas-flow Ionization chambers and the effects of temperature changes Peer-reviewed

Ishihara, M, Yoshii, M. Minami, N, Yasuoka Y, Tokonami, S, Nagahama, H, Mukai, T

Proceedings of the 19th Workshop on Environmental Radioactivity　288-293　2018/11
The anomaly in atmospheric radon concentration prior to the 2011 Tohoku-oki earthquake in Japan.

Yasuoka, Y, Nagahama, H, Muto, J, Mukai, T

Radiation Environment and Medicine　7　(2)　86-94　2018/08
ローソナイトの脱水と稍深発地震に関する実験的研究

角田明博, 白石令, 武藤潤, 鈴木昭夫, 長濱裕幸

日本地球惑星科学連合大会予稿集(Web)　2018　ROMBUNNO.SCG63‐P03 (WEB ONLY)　2018
高温・高圧下における下部地殻岩石のレオロジーに対する水の効果

木戸正紀, 武藤潤, 小泉早苗, 長濱裕幸

日本地質学会学術大会講演要旨　124th　245　2017/09/10
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2017.0_474 　

ISSN： 1348-3935

eISSN： 2187-6665
アイソトープ実験施設の排気モニタによる東北地方太平洋沖地震(Mw9.0)に先行する大気中ラドン濃度変動の検討

安岡由美, 長濱裕幸, 武藤潤, 大森康孝, 鈴木俊幸, 本間好, 山本文彦, 高橋克彦, 向高弘

日本薬学会年会要旨集(CD-ROM)　137th　ROMBUNNO.26PA‐am132　2017
AlphaGUARDを用いた空気中ラドン濃度測定の検討

南のどか, 田中綾, 安岡由美, 長濱裕幸, 武藤潤, 飯本武志, 大森康孝, 床次眞司, 向高弘

日本薬学会年会要旨集(CD-ROM)　136th　ROMBUNNO.28AB‐AM415　2016
Effect of water on plastic deformation of anorthite in high pressure

Kido Masanori, Muto Jun, Koizumi Sanae, Nagahama Hiroyuki

Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2015　(0)　30-30　2015
Publisher: Japan Association of Mineralogical Sciences
DOI： 10.14824/jakoka.2015.0_30 　

ISSN： 1348-6543

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Presence of water enhances plastic deformation of minerals. We performed axial compression experiments on very fine grained (~3 μm) anorthite aggregates. We added water of 0.5 wt% and investigated the effects of water on mechanical properties of anorthite in high temperature and pressure conditions. Experiment with 0.5 wt%-added water shows significant strength reduction compared to the strength predicted by lower pressure experiments (Rybacki et al., 2006). This implies that the effect of water in higher pressure condition might be larger than those predicted by lower pressure experiments.
和歌山における大気中ラドン濃度変動

後藤美加子, 安岡由美, 長濱裕幸, 武藤潤, 井原勇人, 向高弘

アイソトープ・放射線研究発表会要旨集　51st　44　2014/06/20
日本の大気中ラドン濃度変動について:都道府県別の解析

小林由布香, 安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 向高弘

日本薬学会年会要旨集(CD-ROM)　134th　ROMBUNNO.29AML-132　2014
Anomalous change in the atmospheric radon concentration prior to the 2011 Tohoku-Oki Earthquake in Japan. Peer-reviewed

Hayashi, K, Kobayashi, Y, Yasuoka,Y, Nagahama, H, Muto, J, Omori, Y, Suzuki, T, Homma, Y

In: Proceedings of the 15th Workshop on Environmental Radioactivity, Miura T, Kinoshita N (eds), High Energy Accelerated Research Organization (KEK), Tsukuba　23-28　2014

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Abstract:Anomalous changes in the radon concentration in the atmosphere have been reported to occur prior to earthquakes. To determine whether anomalous changes were observed before the 2011 Tohoku-Oki Earthquake in Japan, the atmospheric daily minimum radon concentrations collected in Fukushima prefecture, Miyagi prefecture and Tochigi prefecture during 8-year, 4-year and 3-year periods, respectively, were analyzed. The time series variations of the radon concentrations from the de-trended levels were obtained by subtracting the linear trends (or mean values) and the seasonal variations from the corresponding daily minimum radon concentrations. Based on these results, the outlier values and sharp decreases in the radon concentration determined (greater than ± 3σ compared to the radon variation during the normal period) occurred simultaneously at each site prior to the earthquake. This result raises the possibility of a link between these anomalous changes in the radon concentration and seismic deformation.
宮城・福島・栃木における大気中ラドン濃度変動について:東北地方太平洋沖地震の先行現象

小林由布香, 畠中弘哉, 安岡由美, 長濱裕幸, 武藤潤, 鈴木俊幸, 本間好, 山本文彦, 高橋克彦, 向高弘

アイソトープ・放射線研究発表会要旨集　50th　141　2013/06/20
X線CTを用いた岩石割れ目の空間分布の異方性・不均質性

八巻淳子, 武藤潤, 長濱裕幸, 佐々木治, 鹿納晴尚

日本地質学会学術大会講演要旨　120th　2013

ISSN： 1348-3935
大気中ラドン濃度の変動について：地震先行現象を捕えることができるのか？

安岡由美, 長濱裕幸

放射線教育フォーラムニュースレター　55　8-9　2013
排気モニターによる大気中ラドン濃度測定その2 3地点(札幌・福島・岡崎)における平年変動の解析

中村沙紀, 安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 坂下守, 向高弘

日本放射線安全管理学会学術大会講演予稿集　11th　112　2012/12/04
排気モニターによる大気中ラドン濃度測定その3 札幌医科大学における変動

畠中弘哉, 安岡由美, 長濱裕幸, 坂下守, 向高弘

日本放射線安全管理学会学術大会講演予稿集　11th　113　2012/12/04
排気モニターによる大気中ラドン濃度測定その1 RI施設の影響

多鹿優佳里, 安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 石川徹夫, 床次眞司, 反町篤行, 細田正洋, JANIK Miroslaw, 向高弘

日本放射線安全管理学会学術大会講演予稿集　11th　111　2012/12/04
ラドン濃度変動と地震-地震先行現象の痕跡を排気モニターに求めて-

安岡由美, 長濱裕幸, 鈴木俊幸, 本間好

FB News　(428)　1-5　2012/08
Publisher: JST資料番号：L1678A ISSN：1349-6395
排気モニター(通気式電離箱)による空気中ラドン濃度測定について

安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 石川徹夫, 床次眞司, 向高弘, 柘植麻里奈, 宮本荘子, JANIK Miroslaw, 反町篤行, 細田正洋

日本保健物理学会研究発表会講演要旨集　45th　91　2012/06/16
排気モニターによる広域大気中ラドン濃度測定の提案‐巨. 大地震前後の地殻変動解析に挑戦してみませんか

安岡由美, 長濱裕幸, 鈴木俊幸, 本間好

(1月号、No.693)　17-19　2012

ISSN： 0285-5518
RI排気モニターによる大気中ラドン濃度測定:東北地方太平洋沖地震の場合

安岡由美, 宮本荘子, 鈴木俊幸, 本間好, 長濱裕幸, 向高弘

日本放射線安全管理学会学術大会講演予稿集　10th　66　2011/11/30
S13-04P ライナーガンマ領域の電波減衰特性 : かぐや月レーダーサウンダーの例(一般ポスターセッション1,ポスター発表)

坂東雄一, 熊本篤志, 中村教博, 長濱裕幸

日本惑星科学会秋期講演会予稿集　2011　116-116　2011/10/23
Publisher: 日本惑星科学会
Quartz amorphization due to Pin-on-disk friction experiment

Nakamura Yu, Muto Jun, Nagahama Hiroyuki, Miura Takashi, Arakawa Ichiro

Annual Meeting of the Geological Society of Japan　2011　(0)　262-262　2011
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2011.0.262.0 　

ISSN： 1348-3935
石英のすべり摩擦による放電発光と地震前兆電磁気現象について

武藤潤, 長濱裕幸, 三浦崇, 荒川一郎

月刊地球　32　484-490　2010
Publisher: 海洋出版
兵庫県南部地震前に増加した大気中ラドンの発生源に関する考察

安岡由美, 長濱裕幸, 川田祐介, 大森康孝, 下道國, 石川徹夫, 床次眞司, 橋本哲夫, 志野木正樹

日本保健物理学会研究発表会講演要旨集　43rd　18　2009/06/03
地震前兆期における地殻歪と大気中ラドン濃度変化

長濱裕幸, 川田祐介, 安岡由美, 大森康孝, 石川徹夫, 床次眞司, 志野木正樹

日本地質学会学術大会講演要旨　115th　217-428　2008/09/15
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2008.0.428.0 　

ISSN： 1348-3935
歪む大地はラドンを吐き出すか?‐兵庫県南部地震の場合‐

安岡由美, 川田祐介, 長濱裕幸, 大森康孝, 石川徹夫, 床次眞司, 志野木正樹

日本保健物理学会研究発表会講演要旨集　42nd　6　2008/06/26
兵庫県南部地震前のラドン散逸と地殻歪変化の呼応について

安岡由美, 川田祐介, 長濱裕幸, 大森康孝, 石川徹夫, 床次眞司, 志野木正樹

日本地球化学会年会講演要旨集　55th　43-39　2008
Publisher: GEOCHEMICAL SOCIETY OF JAPAN
DOI： 10.14862/geochemproc.55.0.39.0 　
Radon Anomalies Prior to Earthquakes (I)-Review of Previous Studies-

Tetsuo ISHIKAWA, Yumi YASUOKA, Hiroyuki NAGAHAMA, Yusuke KAWADA, Yasutaka OMORI, Shinji TOKONAMI, Masaki SHINOGI

Japanese Journal of Health Physics　43　(2)　103-111　2008
Publisher: Japan Health Physics Society
DOI： 10.5453/jhps.43.103 　

ISSN： 0367-6110

eISSN： 1884-7560
地震と大気中ラドン濃度の変化（II）−従来の観測例−

石川徹夫, 安岡由美, 長濱裕幸, 川田祐介, 大森康孝, 床次眞司, 志野木正樹

保健物理　43　(3)　253-267　2008
Publisher: Japan Health Physics Society
DOI： 10.5453/jhps.43.253 　

ISSN： 0367-6110

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Before the 1995 Hyogoken-Nanbu earthquake, various geochemical precursors were observed in the aftershock area: chloride ion concentration, groundwater discharge rate, groundwater radon concentration and so on. Kobe Pharmaceutical University (KPU) is located about 25km northeast from the epicenter and within the aftershock area. Atmospheric radon concentration had been continuously measured from 1984 at KPU, using a flow-type ionization chamber. The radon concentration data were analyzed using the smoothed residual values which represent the daily minimum of radon concentration with the exclusion of normalized seasonal variation. The radon concentration (smoothed residual values) demonstrated an upward trend about two months before the Hyogoken-Nanbu earthquake. The trend can be well fitted to a log-periodic model related to earthquake fault dynamics. As a result of model fitting, a critical point was calculated to be between 13 and 27 January 1995, which was in good agreement with the occurrence date of earthquake (17 January 1995). The mechanism of radon anomaly before earthquakes is not fully understood. However, it might be possible to detect atmospheric radon anomaly as a precursor before a large earthquake, if (1) the measurement is conducted near the earthquake fault, (2) the monitoring station is located on granite (radon-rich) areas, and (3) the measurement is conducted for more than several years before the earthquake to obtain background data.
P-205 Properties of natural radiation on the hills of the Asahiyama and the Sue in the northern part of Miyagi

Omori Yasutaka, Nagahama Hiroyuki, Nakamura Norihiro

114　318-318　2007/09/01
Publisher: The Geological Society of Japan
P-99 Damage evolution of crust and radon emanation prior to a large earthquake

Nagahama Hiroyuki, Kawada Yusuke

114　265-265　2007/09/01
Publisher: The Geological Society of Japan
Frictional discharge plasma and seismo-electromagnetic precursor

Nagahama Hiroyuki, Muto Jun, Miura Takashi, Arakawa Ichiro

Annual Meeting of the Geological Society of Japan　2005　(0)　261-261　2005
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2005.0_261_2 　

ISSN： 1348-3935
28pWR-11 Luminescence and triboelectricity between pieces of natural quartz by pin-on-disk experiment

Arakawa I., Miura T., Hashimoto M., Hirade K., Nagahama H., Muto J., Ogiso S.

Meeting Abstracts of the Physical Society of Japan　59　(0)　918-918　2004
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.59.1.4.0_918_1 　

ISSN： 1342-8349
Tribochemical wearing in S-C mylonites and its implication to lithosphere stress level

NAKAMURA Norihiro, NAGAHAMA Hiroyuki

EPS　54　(11)　1103-1108　2002/11/01
Publisher: Terra Scientific Pub. Co.
ISSN： 1343-8832
Surface rupture associated with the Iwate-ken Hokubu Earthquake of September 3, 1998

KOSHIYA K., NODA M., KATO T., TAKIGUCHI S., MITACHI Y., SHIMAMORI M., SAITO T., YANAI K., FUKUDOME T., KITSUNEZAKI C., SATO H., OTSUKI K., NAGAHAMA H., NAKAMURA N., HIRANO S., DOI N., SAWA H., TOGO M., AWATA Y., YOSHIOKA T.

1998　(2)　1998/10/09
Fractal structural geology

Nagahama Hiroyuki

The Memoirs of the Geological Society of Japan.　(50)　13-19　1998
Publisher: 日本地質学会
ISSN： 0385-8545

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Geological structures as manifestations of the mechanical behavior of a deforming rock mass have several fractal properties. A fractal attractor for their spatially disposed patterns has been constructed to infer dynamic information from the fractal geometry of geological structures. Here the validity of fractal scaling, its geometric-physical implications and the fractal attractor for structural geology are shown. Moreover, a non-linear dynamical system, which produces such a fractal geological structure is explained. Finally, the future problem for fractal approaches in structural geology is pointed out.
Possibility of earthquake prediction.Whether does an earthquake occur randomly ?Collective and individual features of an earthquake.

SHIMAZAKI KUNIHIKO, NAGAHAMA HIROYUKI

科学　65　(4)　241-244,248-256-218　1995/04
Publisher: 岩波書店
ISSN： 0022-7625
278. An application of dimensional analysis to the wear rate law of rocks

NAKAMURA Norihiro, NAGAHAMA Hiroyuki

100　497-497　1993/03/25
Publisher: The Geological Society of Japan
315 関東山地北東縁部比企丘陵の領家帯

長濱裕幸, 高木秀雄

日本地質学会学術大会講演要旨　93　422-422　1986/04/25
Publisher: 日本地質学会

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Books and Other Publications 50

自然科学総合実験２０２４年度版

岩佐直仁, 長濱裕幸, 山下琢磨(東北大学自然科学総合実験テキスト編集委員会編)

共立出版　2024/03/31

ISBN: 9784320006188
東北大学大学入試研究シリーズ倉元直樹（監修）、久保沙織（編）再考大学入試改革の論理 9章新学習指導要領の下での大学入試ー高校調査から見えてきた課題ー

倉元直樹, 宮本友弘, 久保沙織, 長濱裕幸

金子書房　2023/05/31

ISBN: 9784760861088
Environmental radioactivity (2020 Introductory Science Experiments)

2020/03
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2019

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2020/03
Environmental radioactivity (2019 Introductory Science Experiments)

Naohito Iwasa, Hiroyuki Nagahama

Tohoku University　2019/03
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2019、東北大学自然科学総合実験テキスト編集委員会（編集）

岩佐直仁, 長濱裕幸

東北大学出版会　2019/03
Thermodynamic consideration on volcanic landforms. In:Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas

Kaneko, N, Nagahama, H

Springer　2019

ISBN: 3030014517
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2018、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2018/03

ISBN: 9784861633102
Environmental radioactivity (2017 Introductory Science Experiments)

Naohito Iwasa, Hiroyuki Nagahama

Tohoku University　2017/03
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2016、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2016/03
Environmental radioactivity (2016 Introductory Science Experiments)

Naohito Iwasa, Hiroyuki Nagahama

Tohoku University　2016/03
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2015、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2015/03
Environmental radioactivity (2015 Introductory Science Experiments)

Naohito Iwasa, Hiroyuki Nagahama

Tohoku University　2015/03
Environmental radioactivity (2014 Introductory Science Experiments)

Naohito Iwasa, Hiroyuki Nagahama

Tohoku University　2014/03
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2014、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2014/03
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2013、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2013/03
Environmental radioactivity (2013 Introductory Science Experiments)

Naohito Iwasa, Hiroyuki Nagahama

Tohoku University　2013/03
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2012、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2012/03
地震とラドン濃度異常

早川正士, 安岡由美, 石川徹夫, 長濱裕幸, 川田祐介, 大森康孝, 床次真司, 志野木正樹

日本専門図書出版　2012/03
Handbook of Radon: Properties, Applications and Health

Li, Z, Feng, C. (ed, Yasuoka, Y, Ishikawa, T, Omori, Y, Kawada, Y, Nagahama, H, Tokonami, S, Shinogi, M

NOVA Sci. Pub., Hauppauge, USA　2012
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2011、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2011/03
Anomalous Radon Concentration Prior to an Earthquake

Yumi Yasuoka, Hiroyuki Nagahama, Tetsuo Ishikawa

LAMBERT Academic Pulication　2011
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2010、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2010/03
Physics of Asymmetric Continuum: Extreme and Fracture Processes – Earthquake Rotation and Soliton Waves (paper)

Teisseyre, R, Nagahama, H, Majewski, E

Springer-Verlag　2010
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2009、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2009/04
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2008、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2008/04
課題3. 地球大気の大循環、東北大学全学教育科目テキスト・文科系開講自然科学総合実験、東北大学文科系開講自然科学総合実験テキスト編集委員会（編）

東北大学文科系のための自然科学総合実験テキスト編集委員会, 長濱裕幸

東北大学出版会　2008/04
Physics of Asymmetric Continuum: Extreme and Fracture Processes – Earthquake Rotation and Soliton Waves

Teisseyre, R, Nagahama, H, Majewski, E

Springer-Verlag　2008
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2007、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2007/04
課題3. 地球大気の大循環、東北大学全学教育科目テキスト・文科系のための自然科学総合実験、東北大学文科系のための自然科学総合実験テキスト編集委員会（編）

東北大学文科系のための自然科学総合実験テキスト編集委員会, 長濱裕幸

2007/04
課題3. 大気の大循環、東北大学全学教育科目テキスト・自然科学総合実験2006 supplement、補遺、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 長濱裕幸

2006/10
Micromorhic Continuum with Defects and Taylor-Bishop-Hill Theory for Polycrystals: Anisotropic Propagation of Seismic Waves and Golebiewska Gauge, In Earthquake Source Asymmetry, Structural Media and Rotation Effects, eds., R. Teisseyre, M. Takeo & E. Maj

J. Muto, Y. Kawada, H. Nagahama

Springer-Verlarg　2006/04
Seismic Finsler Geometry and Kawaguchi Space, In Earthquake Source Asymmetry, Structural Media and Rotation Effects, eds., R. Teisseyre, M. Takeo & E. Majewski

T. Yajima, H. Nagahama

Springer-Verlarg　2006/04
From Non-local to Asymmetrical Deformation Field, In Earthquake Source Asymmetry, Structural Media and Rotation Effects, eds., R. Teisseyre, M. Takeo & E. Majewski

H. Nagahama, R Teisseyre

Springer-Verlarg　2006/04
課題１. 環境放射線を測る、東北大学全学教育科目テキスト・自然科学総合実験2006、東北大学自然科学総合実験テキスト編集委員会（編）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2006/04
課題１. 環境放射線を測る、東北大学教育科目テキスト・自然科学総合実験2005(改訂版）

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2005/04
Water distribution in dynamically recrystallized quartz grains: cathodoluminescence and micro-infrared spectroscopic mappings, In: Bruhn, D. & Burlini, L. (eds.) High-Strain Zones: Structure and Physical Properties.

J. Muto, H. Nagahama, T. Hashimoto

Geological Society of London, Special Publication　2005
課題１. 環境放射線を測る、東北大学教育科目テキスト・自然科学総合実験2004

東北大学自然科学総合実験テキスト編集委員会, 岩佐直仁, 長濱裕幸

東北大学出版会　2004/03
Micromorphic Continuum and Fractal Properties of Faults and Earthquakes

H. Nagahama, R. Teisseyre

2001
Electric and Electromagnetic Field Related to Earthquake Formation

R. Teisseyre, H. Nagahama

2001
Tectono-and Chemicomagnetic Effects in Earthquake Process

N. Nakamura, H. Nagahama

2001
Geomagnetic Field Perturbation and Fault Creep Motion-A New Tectonomagnetic Model

N. Nakamura, H. Nagahama

1999
Dislocational Models of Electric Field Generation in a Seismic Source Zone

R. Teisserye, H. Nagahama

1999
Fractal Structural Geology

H. Nagahama

1998
Spatial and Temporal Evolution of Fault System in a Spring Network Model

N. Nakamura, K. Otsuki, H. Nagahama

1996
Dose Earthquake break out Irregularly? Collective and Individual Characters of Earthquakes.

K. Shimazaki, H. Nagahama

1996
Excursion Guidebook, The 103rd Annual Meeting of the Geological Society of Japan

K.Mori, H. Nagahama

1996
High-temperature Viscoelastic Behaviour and Long Time Tail of Rocks

H. Nagahama

1994
Scaling Laws of Fragmentation

H. Nagahama, K. Yoshii

1994
Self-affine Growth of Fracturing Region in Earthquake

H. Nagahama

1991

Show all Show first 5

Presentations 305

Determination of screening values for radon concentration in indoor air using an activated-charcoal radon collector.

Yumi Yasuoka, June Takemoto, Nanaho Kawamoto, Nao Goda, Hanako Saito, Hiroyuki Nagahama, Jun Muto, Shinji Tokonami, Masahiro Hosoda, Yasutaka Omori, Takeshi Iimoto, Takahiro Mukai

International Symposium on Natural and Artificial Radiation Exposures and Radiological Protection Studies (NARE2023), Hirosaki　2023/09/22
阿武隈山地東縁, 社地神剪断帯沿いに産する石灰岩マイロナイトの変形条件と変形史

横山裕晃, 武藤潤, 長濱裕幸

日本地質学会第130年学術大会　2023/09/18
Brittle-ductile transition of quartz-feldspar aggregates simulated by shear deformation experiments

Furukawa, M, Verberne, B. A, Sawa, S, Muto, J, Takahashi, M, Nagahama, H

Water-Rock Interaction WRI-17　2023/08/21
活性炭捕集器による屋内ラドン濃度の測定

武本樹音, 川本奈々帆, 安岡由美, 長濱裕幸, 武藤潤, 床次眞司, 細田正洋, 大森康孝, 飯本武志, 向高弘

第60回アイソトープ・放射線研究発表会　2023/07/05
鹿児島における大気中ラドン濃度変動

松原賢哉, 安岡由美, 長濱裕幸, 武藤潤, 尾上昌平, 向高弘

第60回アイソトープ・放射線研究発表会　2023/07/05
国立大学における「アドミッションセンター」の現在地

倉元直樹, 池田文人, 永田純一, 大谷奨, 佐藤喜一, 田中克己, 久保沙織, 宮本友弘, 西郡大, 竹内正興, 長濱裕幸

令和5年度全国大学入学者選抜研究連絡協議会大会（第18回）　2023/05/20
東北大学の一般選抜におけるチェックリストを活用した主体性評価の実施結果について

宮本友弘, 久保沙織, 倉元直樹, 長濱裕幸

令和5年度全国大学入学者選抜研究連絡協議会大会（第18回）　2023/05/20
東北大学志願者の調査書を対象とした分析 ―評定平均値・学習成績の状況に着目して―

久保沙織, 宮本友弘, 倉元直樹, 長濱裕幸

令和5年度全国大学入学者選抜研究連絡協議会大会（第18回）　2023/05/20
Experimental study on the brittle-plastic transition in quartz-feldspar aggregates

古川美穂, Berend A. Verberne, 澤燦道, 武藤潤, 高橋美紀, 長濱裕幸

日本地球惑星科学連合2023, 2023年5月, 千葉.　2023/05
ランダムフォレスト解析を用いた大気中ラドン濃度変動による地震の先行現象の検出

土谷真由, 長濱裕幸, 武藤潤, 平野光浩, 安岡由美

日本地球惑星科学連合2023, 2023年5月, 千葉.　2023/05
Graphene oxide in the Mozumi-Sukenobe fault of the Atotsugawa fault system: Effects on mechanical and electromagnetic properties

2023/05
地質構造のRank-1接続とキンク強化

平野光浩, 長濱裕幸

日本地球惑星科学連合2023, 2023年5月, 千葉　2023/05
Pressure dependence on calcite twin density piezomete

Hiroaki Yokoyama, Jun Muto, Hiroyuki Nagahama

Earth, Sea and Sky VIII, May 2023, Miyagi.　2023/05
Deformation experiments on simulated continental faults at the brittle-plastic transition zone of the upper crust

Miho Furukawa, Berend A. Verberne, Sando Sawa, Jun Muto, Miki Takahashi, Hiroyuki Nagahama

Earth, Sea and Sky VIII, May 2023, Miyagi.　2023/05
Physically meaningful parameters of viscoelastic models

Makoto Suda, Hiroyuki Nagahama

Earth, Sea and Sky VIII, May 2023, Miyagi　2023/05
Graphene oxide in the Mozumi-Sukenobe fault of the Atotsugawa fault system: Effects on mechanical and electromagnetic properties of fault

Tomoya Shimada, Hiroyuki Nagahama, Norihiro Nakamura, Jun Muto

Earth, Sea and Sky VIII, May 2023, Miyagi.　2023/05
The power low in information geometry: Attempt from the viscoelastic relaxation of rock

Mitsuhiro Hirano, Hiroyuki Nagahama

EGU General Assembly 2023　2023/04/25
ラドン測定４：気象データを用いた地震前のラドン異常の検出

安岡由美, 長濱裕幸, 平野光浩, 西尾友克

環境放射能研究会　2023/03/06
ラドン測定３：1995年兵庫県南部地震前における気温を用いた変動解析

西尾友克, 安岡由美, 長濱裕幸, 平野光浩, 武藤潤, 向高弘

環境放射能研究会　2023/03/06
ラドン測定２：活性炭捕集器によるスクリーニング測定

川本奈々帆, 齋藤華子, 安岡由美, 長濱裕幸, 武藤潤, 床次眞司, 細田正洋, 大森康孝, 飯本武志, 向高弘

環境放射能研究会　2023/03/06
ラドン測定１：排気モニタによる測定

栗山あかね, 樋口舞, 西村夏樹, 安岡由美, 長濱裕幸, 武藤潤, 細田正洋, 床次眞司, 大森康孝, 飯, 本武志, 向高弘

環境放射能研究会　2023/03/06
機械学習による地震活動に伴う大気中ラドン濃度の異常検知

土谷真由, 長濱裕幸, 武藤潤, 平野光浩, 安岡由美

環境放射能研究会　2023/03
阿武隈山地東縁, 社地神剪断帯沿いに産する石灰岩マイロナイトの変形条件と微細組織組織

横山裕晃, 武藤潤, 長濱裕幸

東北大学理学・生命科学研究科合同シンポジウム, 2023年2月　2023/02
フェーズフィールド法によるゲルマニウムかんらん石の相転移シミュレーション

澤燦道, 武藤潤, 長濱裕幸

第35回計算力学講演会（CMD2022）　2022/11/16
令和 7 年度大学入学共通テストにおいて「情報」を課すことに対する高校側の意見

宮本友弘, 久保沙織, 倉元直樹, 長濱裕幸

日本教育心理学回第64回総会
東北大学のＡＯ入試における書類審査と入学前教育に対する高校側の意見

倉元直樹, 宮本友弘, 久保沙織, 長濱裕幸

日本教育心理学回第64回総会
Effect of Seismic Fault Slip on a Charge Trapping Center in Quartz

KIRIHA TANAKA, JUN MUTO, MIKI TAKAHASHI, ERANGA G. JAYAWICKRAMA, OSAMU, SASAKI, TOSHITAKA OKA, HIROYUKI NAGAHAMA

Earth, Sea and Sky VII: International Joint Graduate Program Workshop in Earth and Environmental Sciences hosted by The Inetrenational Joiint Graduate Program in Earth and Environmental Sciences (GP-EES), Tohoku University June 6-June 10, 2022
Deformation environments of Shajigami shear zone at eastern margin of Abukuma Mountain, Northeastern Japan

HIROAKI YOKOYAMA, JUN MUTO, HIROYUKI NAGAHAMA

Earth, Sea and Sky VII: International Joint Graduate Program Workshop in Earth and Environmental Sciences hosted by The Inetrenational Joiint Graduate Program in Earth and Environmental Sciences (GP-EES), Tohoku University June 6-June 10, 2022　2022/06/06
Shear experiments on quartz-feldspar mixtures under simulated brittle-plastic transition zone of the upper crust

MIHO FURUKAWA, BEREND A. VERBERNE, SANDO SAWA, JUN MUTO, MIKI TAKAHASHI, HIROYUKI NAGAHAMA

Earth, Sea and Sky VII: International Joint Graduate Program Workshop in Earth and Environmental Sciences hosted by The Inetrenational Joiint Graduate Program in Earth and Environmental Sciences (GP-EES), Tohoku University June 6-June 10, 2022
Rheology of rocks: the equivalence of viscoelastic models

Makoto Suda, Hiroyuki Nagahama, Jun Muto

JpGu 2022　2022/06/03
Experimental study on grain growth of synthetic labradorite polycrystals under high temperature and high pressure

Yukiko Kita, Jun Muto, Sawa Sando, Kiriha Tanaka, Hiroyuki Nagahama

JpGu 2022　2022/06/03
Effect of seismic fault slips at various depths on the E1’ center in Quartz

Kiriha Tanaka, Jun Muto, Miki Takahashi, Eranga G. Jayawickrama, Osamu, Sasaki, Toshitaka Oka, Hiroyuki Nagahama

JpGu 2022　2022/06/02
Brittle-plastic transition of experim;lly simulated quartz-feldspar aggregates

Miho Furukawa, Berend A. Verberne, Sando Sawa, Jun Muto, Miki Takahashi, Hiroyuki Nagahama

JpGu 2022　2022/05/31
Effect of grain size on the olivine-spinel phase transformational faulting mechanism for deep-focus earthquakes

Sando Sawa, Nobuyoshi Miyajima, Julien Gasc, Jun Muto, Alexandre Schubnel, Marie Baïsset, Hiroyuki Nagahama

JpGu 2022　2022/05
トンガ王国本島及びエウア島の津波巨礫の磁気記録とその移動年代

佐藤哲郎, 中村教博, 長濱裕幸, 佐藤雅彦, 後藤和久, 渡部真史, 佐竹健治, 池田暁, Kula Taaniela

日本地球惑星科学連合大会 -地磁気・古地磁気・岩石磁気　2022/05/30
新学習指導要領の下での大学入試ー高校調査から見えてきた課題ー

倉元直樹, 宮本友弘, 久保沙織, 長濱裕幸

令和４年度全国大学入学者選抜研究連絡協議会大会（第１７回）　2022/05/28
東北大学保健学科における総合型選抜の評価ー看護学専攻の『AO入試Ⅱ期』についてー

宮本友弘, 久保沙織, 尾崎章子, 宮下光令, 倉元直樹, 長濱裕幸

令和４年度全国大学入学者選抜研究連絡協議会大会（第１７回）　2022/05/28
Mechanism of frictional discharge plasma at fault asperities

Kiriha Tanaka, Jun Muto, Hiroyuki Nagahama

EGU general Assembly 2022　2022/05/27
Can the crustal strength in the brittleplastic transition zone be estimated from the flow stress of calcite mylonite?

Hiroaki Yokoyama, Jun Muto, Hiroyuki Nagahama

EGU general Assembly　2022/05/26
Experimental investigation on kink strengthening of single crystal biotite

Tom OFUNE, Eranga JAYAWICKRAMA, Hiroyuki NAGAHAMA, Jun MUTO

JpGu 2022　2022/05/26
Time-varying stick-slip behaviors described by dehydration kinetics of gypsum

Mikihiro Kawabata, Yuto Sasaki, Masaaki Iwasaki, Rei Shiraishi, Jun Muto, Hiroyuki Nagahama

EGU general Assembly 2022　2022/05/26
Short-wavelength Bouguer anomaly and folding with disclination in the northeastern Japan

Mitsuhiro Hirano, Hiroyuki Nagahama

EGU general Assembly 2022　2022/05/25
Shear of simulated quartz-feldspar aggregates under conditions spanning the brittle-plastic transition

Miho Furukawa, Berend A. Verberne, Jun Muto, Miki Takahashi, Hiroyuki Nagahama

EGU general Assembly 2022　2022/05/25
Experimental research on damage assessment of rocks under high strain rate

Takuma Sekiguchi, Eranga Jayawickrama, Jun Muto, Yoshio Kono, Hiroyuki Nagahama

JpGu 2022　2022/05/23
Microstructure evolution of olivine-spinel phase transformation under differential stress for deep-focus earthquakes by phase field method

S. SAWA, J. MUTO, H. NAGAHAMA

2021/03
福島県相馬地域，立石層石灰岩の変形と構造発達史

横山裕晃, 武藤潤, 長濱裕幸

日本地質学会構造地質部会2020年オンライン例会　2020/10/08
ラマン分光と岩石磁気学による断層ガウジの古応力分析

能勢祐揮, 中村教博, 長濱裕幸

日本地球惑星科学連合大会 (地磁気・古地磁気・岩石磁気)　2020/07/15
空気用ラドンモニタを用いた水中ラドン濃度測定におけるスクリーニング法の検討

高風佑衣, 安岡由美, 細田正洋, 床次眞司, 長濱裕幸, 岩岡和輝, 向高弘

⽇本保健物理学会第53回研究発表会 Web⼤会
排気モニタによる大気中ラドン濃度の推定

森花恵, 安岡由美, 三浦直, 吉井未来, 飯本武志, 床次眞司, 長濱裕幸, 向高弘

⽇本保健物理学会第53回研究発表会 Web⼤会　2020/06/30
Paleo-stress analysis of fault gouges using Raman spectroscopy and rock magnetic methods

JpGU-AGU Joint Meeting 2020　2020/05
大学入試英語問題における設問形式による識別力比較―英文和訳・和文英訳は大学入試で選抜機能を果たしているか

秦野進一, 倉元直樹, 長濱裕幸

令和2年度全国大学入学者選抜研究連絡協議会大会（第15回）研究発表予稿集（クローズドセッション用）　2020/05
東北大学志願者の学力水準の経年分析―過去3年間の大学入試センター試験成績から―

宮本友弘, 庄司強, 倉元直樹, 長濱裕幸

令和2年度全国大学入学者選抜研究連絡協議会大会（第15回）研究発表予稿集（クローズドセッション用）　2020/05
Kink-nucleation criteria in elastic layered materials

2020/03
Grain size dependency of the phase transformational faultingmechanism responsible for deep-focus earthquakes

S. SAWA, N. MIYAJIMA, J. MUTO, H. NAGAHAMA

AGU fall meeting
⽕⼭地形の進化におけるエントロピーの概念

金子尚人, 濱裕幸

第88回形の科学シンポジウム「多様な形とフィボナッチ数」　2019/11/10
微分幾何学を取り入れたキンク褶曲形成理論とキンク強化理論

長濱裕幸

新学術領域研究ミルフィーユ構造の材料科学令和元年度夏季研究会　2019/09/14
微分幾何学を取り入れたキンク褶曲形成理論とキンク強化理論 Invited

長濱裕幸

日本金属学会　2019/09/12
地殻浅部での断層摩擦すべりによる石英ガウジ中のESR信号特性の応力依存性

田中桐葉, 武藤潤, 矢部康男, 岡壽崇, 長濱裕幸

日本地質学会2019　2019/09
Production mechanism of E1’ center by brittle fracture with fault displacement International-presentation

Kiriha Tanaka, Jun Muto, Yasuo Yabe, Toshitaka Oka, Hiroyuki Nagahama

International Conference of Solid State Dosimetry 2019　2019/09
Grain Size Dependency of Ge-Olivine/Spinel on Phase Transformational Faulting Mechanism for Deep-focus Earthquakes International-presentation

S. SAWA, J. MUTO, N. MIYAJIMA, H. NAGAHAM

Geomunster　2019/09
なぜ山の形は山の形なのか？～エントロピーの観点から～

金子尚人, 長濱裕幸

学際科学フロンティア研究所学際高等研究教育院共催第４回 Joint Workshop　2019/08
2018年大阪府北部地震前後の大気中ラドン濃度変動の検討

三浦直, 安岡由美, 大桃善朗, 長濱裕幸, 武藤潤, 岩田大地, 向高弘

第56回アイソトープ・放射線研究発表会　2019/07/04
青葉山に眠る電気ナマズ

金子尚人, 長濱裕幸

学際科学フロンティア研究所学際高等研究教育院共催前期第３回全領域合同研究交流会　2019/07
Grain Size Dependency of Olivine-Spinel Phase Transformational Mechanism Responsible for Deep-focus Earthquakes International-presentation

S. SAWA, J. MUTO, N. MIYAJIMA, H. NAGAHAMA

Earth, Sea, and Sky V　2019/06/02
Statistical correlation between tidal forces and swarm activity in the region of northern part of Wakayama Prefecture International-presentation

KAZUKI MACHIDA, HIROYUKI NAGAHAMA, JUN MUTO

Earth, Sea and Sky V: International Joint Graduate Program Workshop in Earth and Environmental Sciences co-hosted by The International Joint Graduate Program in Earth and Environmental Sciences, Tohoku University and JSPS-DFG Japanese-German Graduate Exte　2019/06/02
Normal Stress dependency of E1’ center in simulated quartz gouge by brittle fracture International-presentation

Kiriha Tanaka, Jun Muto, Yasuo Yabe, Toshitaka Oka, Hiroyuki Nagahama

Earth, Sea and Sky V: International Joint Graduate Program Workshop in Earth and Environmental Sciences　2019/06
Strain Localization Bands Developed in Experimentally Created Fine-grained Aggregates International-presentation

S. SAWA, J. MUTO, N. MIYAJIMA, H. NAGAHAMA

Japanese-German Graduate Externship for Research on Deep Earth Volatile Cycle International Workshop on Deep Volatile Cycling in the Earth　2019/05/31
Grain Size Dependency of Olivine-Spinel PhaseTransformational Mechanism Responsible for Deep-focus Earthquakes

S. SAWA, J. MUTO, N. MIYAJIMA, H. NAGAHAMA

JpGU
東北⽇本弧における断層転位モデルを⽤いた活断層と地殻レオロジーによる重⼒異常

平野光浩, 濱裕幸, 武藤潤

⽇本地球惑星科学連合2019　2019/05/28
Gravity anomaly due to active fault and crustal rheology in the northeastern Japan arc inferred by fault dislocation model

2019/05/28
2021年度東北大学入試の予告に対する高校側の評価— 「受験生保護の大原則」の観点から—

倉元直樹, 長濱裕幸

全国大学入学者選抜研究連絡協議会第14 回大会　2019/05/25
Grain Size Dependency of Olivine-Spinel Phase Transformational Mechanism Responsible for Deep-focus Earthquakes

S. SAWA, J. MUTO, N. MIYAJIMA, H. NAGAHAMA

JpGU meeting　2019/05
Rheological Weakening of the Lower Crustal Rocks Promoted by Anomalous Diffusion of Water International-presentation

Masanori Kido, Jun Muto, Sanae Koizumi, Hiroyuki Nagahama

The Second International Symposium on Crustal Dynamics　2019/03/02
回転式低速剪断すべり試験機を用いた模擬石英ガウジ中のESR信号特性に関する研究

田中桐葉, 武藤潤, 矢部康男, 岡壽崇, 長濱裕幸

東北大学理学・生命科学研究科合同シンポジウム2019　2019/02
Dating of tsunami boulders from Ishigaki Island, Japan, with a stretched exponential relaxation approach International-presentation

Sato T, Nakamura N, Kumagai Y, Goto K, Nagahama H, Minoura K, Zhao X, Heslop D, Roberts A. P

American Geophysical Union Fall meeting 2018　2018/12
地震に先行する大気中ラドン濃度変動：特異スペクトル変換法による異常検知法

岩田大地, 長濱裕幸, 武藤潤, 安岡由美

日本地震予知学会第5回学術講演会　2018/12
Estimation of Anomalous Variation in Atmospheric Radon Concentration Related to Earthquakes by Kalman Filter International-presentation

Daichi Iwata, Hiroyuki Nagahama, Jun Muto, Yumi Yasuoka

AGU Fall Meeting 2018, Washington, D.C.　2018/12
剪断破壊による E₁' 中心のマイクロ波依存性変化

田中桐葉, 武藤潤, 矢部康男, 岡壽崇, 長濱裕幸

2018年ESR応用計測研究会ルミネッセンス年代測定研究会日本フィッション・トラック研究会　2018/11
Thermodynamic consideration on volcanic landform International-presentation

Naoto Kaneko, Hiroyuki Nagahama

First Conference of the Arabian Journal of Geosciences (CAJG 2018)　2018/11
Study of Mechanism Responsible for Deep-focus Earthquakes by a Griggs Type Piston Cylinder Apparatus International-presentation

S. SAWA, N. MIYAJIMA, J. MUTO, H. NAGAHAMA

The 59th High Pressure Conference of Japan　2018/11
Dating of tsunami boulders from Ishigaki and Tongatapu Islands

NAGAHAMA Hiroyuki

2018/11
The effect of the fracture by shallow-fault movement or slow slip on ESR signals in simulated-fault gouge International-presentation

Kiriha Tanaka, Jun Muto, Yasuo Yabe, Toshitaka Oka, Hiroyuki Nagahama

The 5th Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating　2018/10
Evaluation of a radon air monitor as a measurement of radon concentration in water in comparison with a liquid scintillation counter

S.Higuchi, Y. Kamishiro, M. Ishihara, Y. Yasuoka, Y. Mori, M. Hosoda, K.Iwaoka, S.Tokonami, M.Janik, J. Muto, H.Nagahama, T. Mukai

9th International Conference on High Level Environmental Radiation Areas- For Understanding Chronic Low-Dose-Rate Radiation Exposure Health Effectsand Social Impacts (ICHLERA 2018)　2018/09/27
Quantitative analysis of anomalies of at-mospheric radon concentration and earthquakes International-presentation

Daichi Iwata, Hiroyuki Nagahama, Jun Muto, Yumi Yasuoka

Asia Oceania Geosciences Society （AOGS） 15th Annual Meeting, Honolulu, Hawaii　2018/06
高大接続改革への対応に関する高校側の意見——自己採点利用方式による第１次選考，認定試験及び新共通テスト記述式問題の活用—

倉元直樹, 長濱裕幸

全国大学入学者選抜研究連絡協議会第13回大会　2018/05/28
Contact theory based power-law relation representing the pressure dependence of elastic wave velocity

Eranga Gayanath Jayawickrama, Jun Muto, Hiroyuki Nagahama

2018/05/24
ローソナイトの脱水と稍深発地震に関する実験的研究

角田明博, 白石令, 武藤潤, 鈴木昭夫, 長濱裕幸

日本地球惑星科学連合２０１８　2018/05/20
石英多結晶体の粒界古ひずみ速度計の改良

鈴木来夢, 長濱裕幸, 武藤潤

日本地球惑星科学連合２０１８　2018/05/20
マスターカーブ法によるかんらん石の粘弾性解析

八代正和, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１８　2018/05/20
Mechanism of Olivine-Spinel Transformation and Microstructural Development under Differential Stress by Phase Field Method International-presentation

Sando Sawa, Jun Muto, Hiroyuki Nagahama

Earth, Sea and Sky III, Sendai, Miyagi, May 2018　2018/05
Statistical analysis of the correlation between earthquakes and atmospheric radon concentration International-presentation

Daichi Iwata, Hiroyuki Nagahama, Jun Muto, Yumi Yasuoka

International Symposium on Earthquake Forecast/5th International Workshop on Earthquake Preparation Process 〜 Observation, Validation, Modelings, Forecasting 〜 (ISEF-IWEP5) Chiba Iniversity, Chiba, Japan, May 25-27, 2018　2018/05
火山の斜面形状と滑り面の熱力学的考察

金子尚人, 長濱裕幸

日本地球惑星科学連合2018　2018/05
Mechanism of Olivine-Spinel Transformation and Microstructural Development under Differential Stress by Phase Field Method International-presentation

Sando Sawa, Jun Muto, Hiroyuki Nagahama

European Geosciences Union General Assembly 2018, EMRP1.8, Contribution of high-pressure mineralogy and rheology to the understanding of the Earth dynamics – in memoriam of Harry W. Green II, Vienna, Austria, April 2018　2018/04
ラドン濃度測定における管理モニタの校正

長濱裕幸

第19回「環境放射能」研究会　2018/03/13
Mechanism of Olivine-spinel Transformation and Microstructural Development under Differential Stress by Phase Field Method International-presentation

S. SAWA, J. MUTO, H. NAGAHAMA

EGU General Assembly　2018/03/03
High Pressure and High Temperature Deformation Experiments on Synthetic Anorthite Aggregates: The Effect of Water on Rheological Properties International-presentation

Masanori Kido, Jun Muto, Sanae Koizumi, Hiroyuki Nagahama

2017 American Geophysical Union Fall Meeting　2017/12/12
活性炭型ラドン検出器による屋内ラドン濃度測定の検討

藤井さとみ, 新井友里愛, 安岡由美, 飯本武志, 床次眞司, Miroslaw Janik, 長濱裕幸, 武藤潤, 向高弘

第67回日本薬学会近畿支部大会　2017/10/14
Inverse magnetic fabric of anisotropy of magnetic susceptibility in tsunami deposits

Shusaku Kon, Norihiro Nakamura, Hiroyuki Nagahama

2017/10
Quartz and K-Feldspar Microboudins in Felsic Granulites: Evidence for Rheological Turnover and Implications to Weak Lower Continental Crust

Athurupana, B, Muto, J, Fukuda, J, Nagahama, H, Nagase, T

日本地球惑星科学連合201７　2017/05

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JpGU-AGU Joint Meeting May 2017. Chiba, Japan
Fracture contact state inferred from one dimensional longitudinal wave velocity: Theoretical and experimental approach

Eranga, G.J, Tamai, H, Muto, J, Nagahama, H

日本地球惑星科学連合201７　2017/05

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JpGU-AGU Joint Meeting May 2017. Chiba, Japan
地震の先行時間とテルツァギの圧密理論,

金子尚人, 長濱裕幸

日本地球惑星科学連合201７　2017/05
アイソトープ実験施設の排気モニタによる東北地方太平洋沖地震（Mw9.0）に先行する大気中ラドン濃度変動の検討

安岡由美, 長濱裕幸, 武藤潤, 大森康孝, 鈴木俊幸, 本間好, 山本文彦, 高橋克彦, 向高弘

日本薬学会第137年会　2017/03/26
Rheological Turnover of Quartz and K-Feldspar in Felsic Granulites: Implications to Weak Lower Continental Crust

Athurupana, B, Muto, J, Fukuda, J, Nagahama, H, Nagase, T

Science and Life Science Joint Symposium 2017, Tohoku University, Japan, Feb 2017　2017/02
One dimensional longitudinal wave velocity and the contact state of fractures: Theoretical and experimental approach

Eranga, G.J, Muto, J, Nagahama, H

Science and Life Science Joint Symposium 2017, Tohoku University, Japan, Feb 2017　2017/02
Effect of infiltrated water on rheology of plagioclase feldspar under lower crustal condition International-presentation

Masanori KIDO, Jun MUTO, Sanae KOIZUMI, Hiroyuki NAGAHAMA

2016 AGU Fall Meeting　2016/12/14
Concept of plasticity index to influence mechanical bifurcation of soils and soft-sediment deformation International-presentation

Momoko Hirata, Jun Muto, Hiroyuki Nagahama

Second International Conference on Science, Engineering & Environment (SEE-Osaka 2016), 2755, Uemoto-cho, Osaka, Japan, November, 2016.　2016/11/22
Concept of plasticity index to influence mechanical bifurcation of soils and soft-sediment deformation International-presentation

Naoto Kaneko, Jun Muto, Hiroyuki Nagahama

Second International Conference on Science, Engineering & Environment (SEE-Osaka 2016), 2755, Uemoto-cho, Osaka, Japan, November, 2016.　2016/11
Self-affinities of Folds and Incomplete Similarity International-presentation

Kazuhei Kikuchi, Hiroyuki Nagahama

The 5th Annual International Conference on Geological and Earth Sciences, Singapore, October 10, 2016.　2016/10/10
Anomalous atmospheric radon concentration related to earthquakes: Anomaly detection by singular spectrum transformation International-presentation

Daichi Iwata, Hiroyuki Nagahama, Jun Muto, Yumi Yasuoka

5th International Geo-Hazard Research Symposium, Taipei, Taiwan, October, 2016　2016/10
圧密方程式と多孔質媒体方程式：フィンスラー空間とリッチ・フロー

長濱裕幸

日本地質学会第123年学術大会　2016/09/12

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日本地質学会第123年学術大会，東京都世田谷区桜上水，日本大学文理学部キャンパス，2016年9月
特異スペクトル変換法を利用した大気中ラドン濃度異常検知と地震活動

岩田大地, 長濱裕幸, 武藤潤, 安岡由美

日本地質学会第123年学術大会　2016/09

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日本地質学会第123年学術大会，東京都世田谷区桜上水，日本大学文理学部キャンパス，2016年9月
Spherical shell tectonics: Batdorf parameter of subducting lithosphere International-presentation

Kazuhei Kikuchi, Hiroyuki Nagahama

Asia Oceania Geosciences Society 13th Annual Meeting, SE18-D4-PM2-P-022, Beijing, China, July 31 – August 5, 2016　2016/07/31
Energetic Analysis of Critical Slip Displacement on Slip Instability International-presentation

Momoko Hirata, Jun Muto, Hiroyuki Nagahama

International Symposium Crustal Dynamics 2016: Unified Understanding of Geodynamic Processes at Differential Time and Length Scales　2016/07/21
Ductility Enhancement of K-feldspar in Lower Continental Crust due to Retrograde Exsolution International-presentation

Athurupana, B.M.B, Muto, J, Fukuda, J, Nagahama, H

International Symposium Crustal Dynamics 2016: Unified Understanding of Geodynamic Processes at Differential Time and Length Scales　2016/07/21
Rheology of Water-infiltrated Polycrystalline Anorthite Under the Conditions of Lower Crust International-presentation

Masanori KIDO, Jun MUTO, Sanae KOIZUMI, Hiroyuki NAGAHAMA

International Symposium Crustal Dynamics 2016: Unified Understanding of Geodynamic Processes at Differential Time and Length Scales　2016/07/21
Contact State of Microcracks inferred by elastic wave velocity through cracked media International-presentation

Eranga, J.G, Tamai, H, Muto, J, Nagahama, H

International Symposium Crustal Dynamics 2016: Unified Understanding of Geodynamic Processes at Differential Time and Length Scales　2016/07/21
連続測定におけるラドン濃度測定器の比較

石原万己, 南のどか, 新井友里愛, 安岡由美, 長濱裕幸, 武藤潤, 飯本武志, 大森康孝, 床次眞司, 向高弘

日本保健物理学会第49回研究発表会　2016/06/30
リソスフェアの変形の微分幾何学

菊地和平, 長濱裕幸

第81回形の科学シンポジウム　2016/06/03
高温高圧下における斜長石のレオロジーと水の効果

木戸正紀, 武藤潤, 小泉早苗, 長濱裕幸

日本地球惑星科学連合2016　2016/05/22

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日本地球惑星科学連合2016年大会，千葉県千葉市，2016年5月22日
土質試料および岩石の力学的分岐と塑性指数

金子尚人, 武藤潤, 長濱裕幸

日本地球惑星科学連合2016　2016/05

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『日本地球惑星科学連合2016』、S-CG58-P07、地球惑星科学におけるレオロジーと破壊・摩擦の物理、千葉県幕張、2016年5月
特異スペクトル変換法を利用した大気中ラドン濃度異常変動解析

岩田大地, 長濱裕幸, 武藤潤, 安岡由美

日本地球惑星科学連合2016　2016/05

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日本地球惑星科学連合2016年大会，千葉県千葉市，2016年5月
摩擦の不安定生に関するエネルギー的評価と剪断に伴う組織発達の定量的評価

平田萌々子, 武藤潤, 長濱裕幸

日本地球惑星科学連合2016　2016/05

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日本地球惑星科学連合2016年大会，千葉県千葉市，2016年5月
AlphaGUARDを用いた空気中ラドン濃度測定の検討

南のどか, 田中綾, 安岡由美, 長濱裕幸, 武藤潤, 飯本武志, 大森康孝, 床次眞司, 向高弘

日本薬学会第136年会　2016/03/28
斜長石のレオロジーにおける水の効果

木戸正紀, 武藤潤, 長濱裕幸

地震発生の素過程研究集会　2016/03/08
高温高圧変形試験機を用いた差応力測定精度の向上

木戸正紀, 武藤潤, 長濱裕幸

東北大学大学院理学研究科第9回6専攻合同シンポジウム　2016/02/19
The Energetic Assessment of Frictional Instability Based on Rowe's Theory International-presentation

Momoko Hirata, Jun Muto, Hiroyuki Nagahama

American Geophysical Union 2015 Fall Meeting　2015/12/14
東北大学所有Griggs型固体圧変形試験機の差応力測定値の較正

木戸正紀, 武藤潤, 長濱裕幸

新学術領域研究「地殻ダイナミクスー東北沖地震後の内陸変動の統一的理解ー」2015年研究集会　2015/09/28
粒状体における摩擦不安定性のエネルギー的評価

平田萌々子, 武藤潤, 長濱裕幸

新学術領域研究「地殻ダイナミクスー東北沖地震後の内陸変動の統一的理解ー」2015年研究集会　2015/09/28
沈み込み帯における海洋リソノスフェアの球殻座屈現象

菊地和平, 長濱裕幸

新学術領域研究「地殻ダイナミクスー東北沖地震後の内陸変動の統一的理解ー」2015年研究集会　2015/09/27
高圧下における灰長石の塑性変形に与える水の効果

木戸正紀, 武藤潤, 小泉早苗, 長濱裕幸

日本鉱物科学会2015年年会　2015/09/25
非ホロノーム部分空間分解論 (接触テンソル解析)

長濱裕幸, 菊地和平

日本地質学会第122年学術大会　2015/09/11
Batdorf parameter for the spherical shells tectonics

Kazuhei Kikuchi, Hiroyuki Nagahama

European Geosciences Union General Assembly 2015　2015/08/17
日本における大気中ラドン濃度の平年変動について

南のどか, 小林由布香, 安岡由美, 大森康孝, 長濱裕幸, 真田哲也, 武藤潤, 鈴木俊幸, 本間好, 井原勇人, 久保田和人, 向高弘

日本保健物理学会第48回研究発表会　2015/07/02
球殻テクトニクスにおける近藤理論

菊地和平, 長濱裕幸

日本地球惑星科学連合２０１５年連合大会　2015/05/24
Calibration for stress measurement of Griggs-type high temperature and high pressure deformation apparatus

Kido M, Muto J, Nagahama H

日本地球惑星科学連合２０１５年連合大会 (Japan Geoscience Union Meeting 2015 (International Session))　2015/05/24
Roweの法則を基にした摩擦の不安定性に関する統一的理解

平田萌々子, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１５年連合大会　2015/05/24
地殻変動に起因する大気中ラドン濃度

岩田大地, 長濱裕幸, 武藤潤, 安岡由美, 三浦哲, 太田雄策

日本地球惑星科学連合２０１５年連合大会　2015/05/24
Batdorf parameter for the spherical shells tectonics

Kazuhei Kikuchi, Hiroyuki Nagahama

European Geosciences Union General Assembly 2015　2015/04/12
Calibration law for stress measurements of Griggs-type solid medium deformation apparatus International-presentation

Kido M, Muto J, Nagahama H

12th International Workshop on WATER DYNAMICS　2015/03/09
Relationship between Self-affinities of Folds and Hidden Earthquake International-presentation

Kikuchi, K, Abiko,K, Nagahama, H, Muto, J

Asia Oceania Geosciences Society 2014, Sapporo, Hokkaido　2014/07
Luminous phenomena and electromagnetic emission VHF wave emission originated earthquake-related radon emanation International-presentation

Seki, A, I. Tohbo, Y. Omori, J. Muto, H. Nagahama

Asia Oceania Geosciences Society 2014, Sapporo, Hokkaido　2014/07
Griggs型固体圧式変形試験機の差応力測定値の較正

木戸正紀, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１4年連合大会　2014/04/30
Microstructural observation of quartz and K-feldspar in quartzo-feldspathic granulite in Sri Lanka

Athurupana, B, Fukuda, J, Muto, J, Nagahama, H

日本地球惑星科学連合２０１4年連合大会　2014/04/28
褶曲の波長と振幅の自己アフィン性

菊地和平, 長濱裕幸

日本地球惑星科学連合２０１４年連合大会　2014/04/28
エネルギー比の観点からみた摩擦不安定性に関する実験的研究

平田萌々子, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１4年連合大会　2014/04/28
日本の大気中ラドン濃度変動について：都道府県別の解析

小林由布香, 安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 向高弘

日本薬学会第134年会　2014/03/29
Heterogeneous water distribution and strain localization in polycrystalline anorthite by water-added deformation experiment International-presentation

Fukuda, J, Muto, J, Nagahama, H

American Geophysical Union 2013 Fall Meeting　2013/12
Self-affinities for the amplitude and the wavelength of folds: A general renormalization -group argument International-presentation

Kikuchi, K, Nagahama, H

American Geophysical Union 2013 Fall Meeting　2013/12
Luminous phenomena and electromagnetic emission VHF wave emission originated earthquake-related radon emanation International-presentation

Seki, A, I. Tohbo, Y. Omori, J. Muto, H. Nagahama

American Geophysical Union 2013 Fall Meeting　2013/12
The friction experiments using simulated fault gouge: Rowe’s constant energy ratio International-presentation

Hirata, M, Muto, J, Nagahama, H, Otsuki, K

American Geophysical Union 2013 Fall Meeting　2013/12
The electromagnetic radiation from semiconductor minerals in the orebody International-presentation

Ozawa, M, Muto, J, Nagahama, H, Nagase T

American Geophysical Union 2013 Fall Meeting　2013/12
大気中ラドンに由来する空気ルミネッセンスと電磁波放射

関明日香, 大森康孝, 武藤潤, 長濱裕幸

地球電磁気・地球惑星圏学会（SGEPSS)，第134 回総会・講演会　2013/11/02
Experimental analysis on Rowe's stress-dilatancy relation and frictional instability of fault gouges International-presentation

Momoko Hirata, Jun Muto, Hiroyuki Nagahama, Kenshiro Otsuki

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards　2013/10/19
Electromagnetic radiations from semiconductor minerals International-presentation

Mitsuyuki Ozawa, Jun Muto, Hiroyuki Nagahama, Toshiro Nagase

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards　2013/10/19
Inhomogeneity of fractal property in rock minerals using 3D X-ray CT measurement International-presentation

Yamaki, J, Muto, J, Nagahama, H, Sasaki, O, Kano, H

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards　2013/10/19
Self-affinities Analysis of Fault-related Folding International-presentation

Kikuchi, K, Abiko,K, Nagahama, H, Muto, J

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards　2013/10/19
Seismic luminous phenomena and VHF electromagnetic emission originated from radon emanation International-presentation

Seki, A, I. Tohbo, Y. Omori, J. Muto, H. Nagahama

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards　2013/10/19
Sinusoidal model for the annual variation of atmospheric radon concentration in Japan International-presentation

Nakamura S, Hayashi K, Yasuoka Y, Nagahama H, Muto J, Omori Y, Ishikawa T, Suzuki T, Homma Y, Ihara H, Mukai T

The 2nd G-EVER International Symposium and the 1st IUGS & SCJ International Workshop on Natural Hazards　2013/10/19
簡易モデルによる屋外ラドン濃度の季節変動の推定

林孝積, 安岡由美, 長濱裕幸, 武藤潤, 石川徹夫, 鈴木俊幸, 本間好, 大森康孝, 向高弘

第63回日本薬学会近畿支部大会　2013/10/12
ガス圧試験機を用いた岩石の弾性波速度測定における封圧の影響

玉井速汰, 武藤潤, 長濱裕幸, 石川正弘

日本地質学会第120年学術大会　2013/09/14
半導体鉱物の電気特性と摩擦・破壊に伴う放電現象

小沢光幸, 武藤潤, 長濱裕幸, 長瀬敏郎

日本地質学会第120年学術大会　2013/09/14
模擬断層ガウジの挙動に関する実験的研究

平田萌々子, 武藤潤, 長濱裕幸, 大槻憲四郎

日本地質学会第120年学術大会　2013/09/14
東北大学固体圧式変形試験機の応力測定精度評価

木戸正紀, 武藤潤, 長濱裕幸

日本地質学会第120年学術大会　2013/09/14
不均質媒体中のダルシー流とフィンスラー空間

長濱裕幸, 谷島尚宏

日本地質学会第120年学術大会　2013/09/14
褶曲に関する微分幾何学

菊地和平, 長濱裕幸

日本地質学会第120年学術大会　2013/09/14
3次元 X 線 CT を用いた岩石試料の割れ目のフラクタル幾何学的特性

八巻淳子, 武藤潤, 長濱裕幸, 佐々木治, 鹿納晴尚

日本地質学会第120年学術大会　2013/09/14
Fractal characteristic of fracture in glass or single crystals of quartz by 3D X-ray CT measurement International-presentation

Junko Yamaki, Jun Muto, Hiroyuki Nagahama, Osamu Sasaki, Harumasa Kano

The 6th International Symposium on In-situ Rock Stress　2013/08/20
宮城・福島・栃木における大気中ラドン濃度変動について:東北地方太平洋沖地震の先行現象

小林由布香, 畠中弘哉, 安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 山本文彦, 高橋克彦, 向高弘

第50回アイソトープ・放射線研究発表会　2013/07/05
ガス圧試験機を用いた沈み込み帯岩石の弾性波速度測定

玉井速汰, 武藤潤, 長濱裕幸, 石川正弘

日本地球惑星科学連合２０１3年連合大会　2013/05/19
硫化鉱物の整流特性と地球電磁気現象への応用

小沢光幸, 武藤潤, 長濱裕幸, 長瀬敏郎

日本地球惑星科学連合２０１3年連合大会　2013/05/19
模擬断層ガウジの圧密に関する実験的研究

平田萌々子, 武藤潤, 長濱裕幸, 大槻憲四郎

日本地球惑星科学連合２０１3年連合大会　2013/05/19
人工アノーサイト多結晶体中の水の不均質分布と歪の局所化（Heterogeneous distribution of water and strain localization of polycrystalline synthetic anorthite）

福田惇一, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１3年連合大会　2013/05/19
地殻の褶曲と破壊に関する微分幾何学

菊地和平, 長濱裕幸

日本地球惑星科学連合２０１3年連合大会　2013/05/19
3次元 X 線 CT を用いた岩石試料の割れ目のフラクタル幾何学的特性

八巻淳子, 武藤潤, 長濱裕幸, 佐々木治, 鹿納晴尚

日本地球惑星科学連合２０１3年連合大会　2013/05/19
General expressions of seismic solitary wave by differential geometry of higher-order spaces International-presentation

Kazuhei Kikuchi, Takahiro Yajima, Hiroyuki Nagahama

European Geosciences Union General Assembly 2013　2013/04/07
Fractal properties of fracture in rock mineral using 3D X-ray CT measurement International-presentation

Junko Yamaki, Jun Muto, Hiroyuki Nagahama, Osamu Sasaki, Harumasa Kano

The 10th International Workshop on WATER DYNAMICS (Deep Carbon Cycle /Geosphere Pollution) &ICDP Japan Beyond-Brittle Project　2013/03/12
Experimental study about mechanical behavior of simulated fault gouge toward unstable slip International-presentation

Momoko Hirata, Jun Muto, Hiroyuki Nagahama, Kenshiro Otsuki

The 10th International Workshop on WATER DYNAMICS (Deep Carbon Cycle /Geosphere Pollution) &ICDP Japan Beyond-Brittle Project　2013/03/12
Microstructures and grain size distribution of pulverized fault rocks International-presentation

Jun Muto, Tsurugi Nakatani, Osamu Nishikawa, Hiroyuki Nagahama

The 10th International Workshop on WATER DYNAMICS (Deep Carbon Cycle /Geosphere Pollution) &ICDP Japan Beyond-Brittle Project　2013/03/12
東北地方太平洋沖地震に先行する大気中ラドン濃度異常変動

林孝積, 小林由布香, 安岡由美, 長濱裕幸, 武藤潤, 大森康孝, 鈴木俊幸, 本間好, 山本文彦, 高橋克彦, 向高弘

第15回「環境放射能」研究会　2013/03/07
地震に先行する大気中ラドン濃度変動に関する観測

長濱裕幸, 武藤潤, 安岡由美, 畠中弘哉, 小林由布香, 本間好, 鈴木俊幸, 坂下守

「地震及び火山噴火予知のための観測研究計画」平成２４年度成果報告シンポジウム　2013/03
地震前後の大気中ラドン濃度の異常変動と地殻歪との呼応について

畠中弘哉, 安岡由美, 武藤潤, 長濱裕幸, 鈴木俊幸, 本間好, 坂下守, 小林由布香, 向高弘

第14回「環境放射能」研究会　2013/02/26
排気モニターによる大気中ラドン濃度測定その1: RI施設の影響

多鹿優佳里, 安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 石川徹夫, 床次眞司, 反町篤行, 細田正洋, Miroslaw Janik, 向高弘

日本放射線安全管理学会　2012/12/06
排気モニターによる大気中ラドン濃度測定その2: 3地点（札幌・福島・岡崎）における平年変動の解析

中村沙紀, 安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 坂下守, 向高弘

日本放射線安全管理学会　2012/12/06
排気モニターによる大気中ラドン濃度測定その3：札幌医科大学における変動

畠中弘哉, 安岡由美, 長濱裕幸, 坂下守, 向高弘

日本放射線安全管理学会　2012/12/06
排気モニターによる大気中ラドン濃度測定その3：札幌医科大学における変動

畠中弘哉, 安岡由美, 長濱裕幸, 坂下守, 向高弘

日本放射線安全管理学会　2012/12/06
Paleomagnetic Emplacement History of Tsunami Boulders at Ishigaki Island, Japan International-presentation

Sato, T, Nakamura, N, Goto, K, Nagahama, H, Minoura, K

2012 AGU Fall Meeting　2012/12
2011年東北地方太平洋沖地震（Mw = 9.0）前の大気中ラドン濃度変動

長濱裕幸, 安岡由美, 鈴木俊幸, 本間好, 武藤潤, 多鹿優佳里, 関明日香

地球電磁気・地球惑星圏学会（2012年秋学会）・講演会　2012/10/20
石垣島産津波石の古地磁気からみる堆積気記録

佐藤哲郎, 中村教博, 長濱裕幸

地球電磁気・地球惑星圏学会（2012年秋学会）・講演会　2012/10/20
野島断層の層状断層岩の電磁波伝搬特性

三國屋しおり, 中村教博, 長濱裕幸

地球電磁気・地球惑星圏学会（2012年秋学会）・講演会　2012/10/20
大気中ラドン濃度変動：2011年東北地方太平洋沖地震と1995年兵庫県南部地震の先行現象

安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 向高弘

第2回地震予知研究シンポジウム　2012/09/29
Finsler geometry of ray paths in weakly anisotropic media International-presentation

Takahiro Yajima, Kazuhito Yamasaki, Hiroyuki Nagahama

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics　2012/09/26
Fabric evolution of single crystals of synthetic quartz sheared at low temperature International-presentation

Hideaki Kaneko, Jun Muto, Hiroyuki Nagahama

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics　2012/09/26
Microstructures and grain size distribution of pulverized fault rocks: Examples from San Andreas Fault and Arima-Takatsuki Tectonic line International-presentation

Tsurugi Nakatani, Jun Muto, Osamu Nishikawa, Hiroyuki Nagahama, Kenshiro Otsuki

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics　2012/09/26
Effect of crustal fluids on plastic deformation of polycrystalline anorthite International-presentation

Jun Muto, Jun-ichi Fukuda, Hiroyuki Nagahama

G-COE symposium 2012; Achievements of G-COE Program for Earth and Planetary Dynamics　2012/09/25
粘弾性構成則と分数階微分の幾何学

長濱裕幸, 谷島尚宏

日本地質学会第119年学術大会　2012/09/15
Pulverized rockの微細構造と粒径分布：サンアンドレアス断層と有馬高槻構造線

中谷剣, 武藤潤, 西川治, 長濱裕幸, 大槻憲四郎

日本地質学会第119年学術大会　2012/09/15
三次元幾何形態解析による浮遊性有孔虫室房形態の定量的比較

伊藤光, 佐々木理, 長濱裕幸

日本地質学会第119年学術大会　2012/09/15
長石多結晶体への水の導入と塑性変形の促進

福田惇一, 武藤潤, 長濱裕幸

日本地質学会第119年学術大会　2012/09/15
Spectrum analysis of pixel fluctuations in famous paintings International-presentation

Kazuhei Kikuchi, Naoaki Bekki, Hiroyuki Nagahama

The Asia-Pacific Conferences on Fundamental Problems of Opto- and Microelectronics 2012, Dalian University of Technology　2012/08/21
大気中ラドン濃度変動-2011年東北地方太平洋沖地震と1995年兵庫県南部地震の先行現象-

安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 向高弘

日本保健物理学会第45回研究発表会　2012/06/17
2011年東北地方太平洋沖地震（MW = 9.0）前の大気中ラドン濃度変動

安岡由美, 長濱裕幸, 鈴木俊幸, 本間好, 久保田和人, 片岡賢英

日本地球惑星科学連合２０１２年連合大会　2012/05
断層深部延長におけるイントラフォリアル褶曲の発達

金子英亮, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１２年連合大会　2012/05
サンアンドレアス断層と有馬高槻構造線に分布するPulverized Rockの微細構造および鉱物による破砕の違いについて

中谷剣, 武藤潤, 西川治, 長濱裕幸

日本地球惑星科学連合２０１２年連合大会　2012/05
定数アンカーポイント法による浮遊性有孔虫室房の三次元幾何形態解析

伊藤光, 佐々木理, 長濱裕幸

日本地球惑星科学連合２０１２年連合大会　2012/05
人工アノーサイト多結晶体の変形実験：水の効果

福田惇一, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１２年連合大会　2012/05
石垣島津波石の古地磁気から見る堆積記録

佐藤哲郎, 中村教博, 箕浦幸治, 長濱裕幸

日本地球惑星科学連合２０１２年連合大会　2012/05
Subsurface Magnetized Source Layers underneath the Mare Crisium Observed by Lunar Radar Sounder International-presentation

Y. Bando, A. Kumamoto, N. Nakamura, H. Nagahama

43rd Lunar and Planetary Science Conference　2012/03/19
Subsurface Magnetized Source Layers underneath the Mare Crisium Observed by Lunar Radar Sounder International-presentation

Bando, Y, Kumamoto, A, Nakamura, N, Nagahama, H

43rd Lunar and Planetary Science Conference　2012/03/19
Experimental investigation of the effect of water on fabric development of anorthite International-presentation

Fukuda J, Muto J, Nagahama H

The 9th International Workshop on WATER DYNAMICS (Deep Carbon Cycle /Geosphere Pollution) &ICDP Japan Beyond-Brittle Project　2012/03/07
Atmospheric Radon Variation Before and After the 2011 Tohoku Earthquake (MW = 9.0) International-presentation

Yumi Yasuoka, Marina Tsuge, Shoko Miyamoto, Hiroyuki Nagahama, Toshiyuki Suzuki, Yoshimi Homma, Kazuhito Kubota, Takahiro Mukai

NARE 2012 SYMPOSIUM on the NATURAL RADIATION EXPOSURES and LOW DOSE RADIATION EPIDEMIOLOGICAL STUDIES　2012/03/02
Magnetic anomaly in Mare Crisium observed by Lunar Radar Sounder: Interpretaion based on the lunar core dynamo model International-presentation

Y. Bando, A. Kumamoto, N. Nakamura, H. Nagahama

The 6th KAGUYA (SELENE) Science Working Team Meeting - New Light on the Origin and Evolution of the Moon -　2012/01/10
Magnetic anomaly in Mare Crisium observed by Lunar Radar Sounder: Interpretaion based on the lunar core dynamo model International-presentation

Bando, Y, Kumamoto, A, Nakamura, N, Nagahama, H

The 6th KAGUYA (SELENE) Science Working Team Meeting - New Light on the Origin and Evolution of the Moon -　2012/01/10
RI排気モニターによる大気中ラドン濃度測定：東北地方太平洋沖地震の場合

安岡由美, 宮本荘子, 鈴木俊幸, 本間好, 長濱裕幸, 向高弘

日本放射線安全管理学会第10回学術大会　2011/12/02
Physical process of quartz amorphization due to friction by Raman spectroscopy International-presentation

Y. Nakamura, J. Muto, H. Nagahama, T. Miura, I. Arakawa, I. Shimizu

2011 AGU Fall Meeting　2011/12
Finsler metric and anisotropic media in seismic ray theory International-presentation

Takahiro Yajima, Kazuhito Yamasaki, Hiroyuki Nagahama

The 46-th Symposium on Finsler Geometry　2011/11/18
ライナーガンマ領域の電波減衰特性：かぐや月レーダーサウンダーの例

坂東雄一, 熊本篤志, 中村教博, 長濱裕幸

日本惑星科学会２０１１年度秋季講演会　2011/11
RI排気モニターがとらえた東北地方太平洋沖地震前の大気中ラドン濃度変動

片岡賢英, 安岡由美, 鈴木俊幸, 本間好, 長濱裕幸

平成23年度主任者部会年次大会 (第52回放射線管理研修会）　2011/11/01
東北地方太平洋沖地震（Mw=9.0)前の大気中ラドン濃度変動について

長濱裕幸, 安岡由美, 鈴木俊幸, 本間好

日本地震学会2011年度秋季大会　2011/10/12
長石多結晶体への水の導入と塑性変形の促進

福田惇一, 武藤潤, 長濱裕幸

日本地質学会第119年学術大会　2011/09/15

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2011年11月平成23年度主任者部会年次大会 (第52回放射線管理研修会) 最優秀ポスター賞 RI排気モニターがとらえた東北地方太平洋沖地震前の大気中ラドン濃度変動
高分解能 X 線 CT による微小化石の形態解析

遠藤孝義, 佐々木理, 長濱裕幸

第 21 回日本数理生物学会大会　2011/09/13
異方性媒質中の地震波線とフィンスラー幾何学

長濱裕幸, 谷島尚宏, 山崎和仁

日本地質学会第118年学術大会　2011/09/09
高分解能X線CTによる浮遊性有孔虫の三次元形態

遠藤孝義, 佐々木理, 長濱裕幸

日本地質学会第118年学術大会　2011/09/09
東北地方太平洋沖地震前の大気中ラドン濃度変動

長濱裕幸

「地震及び火山噴火予知のための観測研究計画」成果報告シンポジウム　2011/08/20
ピンオンディスク摩擦実験による石英の非晶質化：ラマン分光分析

中村悠, 武藤潤, 長濱裕幸, 三浦崇, 荒川一郎

日本地球惑星科学連合２０１１年連合大会　2011/05/23
断層深部延長におけるイントラフォリアル褶曲の発達

金子英亮, 武藤潤, 長濱裕幸

日本地球惑星科学連合２０１１年連合大会　2011/05
かぐや月レーダーサウンダー観測によるライナーガンマ領域の電波吸収特性について

坂東雄一, 熊本篤志, 中村教博, 長濱裕幸

日本地球惑星科学連合２０１１年連合大会　2011/05
微化石研究におけるX線CTを使用した形態解析の有用性：浮遊性有孔虫の例

遠藤孝義, 佐々木理, 長濱裕幸

日本地球惑星科学連合２０１１年連合大会　2011/05
室房分画による浮遊性有孔虫3次元形態の定量解析手法

伊藤光, 佐々木理, 岩下智洋, 長濱裕幸

日本地球惑星科学連合２０１１年連合大会　2011/05
地震先行現象としての電磁放射とラドン散逸：模擬断層ガウジの固着すべりに先行する電位変化

長濱裕幸, 武藤潤, 大沼久美, 大森康孝, 大槻憲四郎

「地震及び火山噴火予知のための観測研究計画」成果報告シンポジウム　2011/03/03
浮遊性有孔虫を対象とした三次元形態計測の試み

遠藤孝義, 佐々木理, 長濱裕幸

日本古生物学会第160回例会　2011/01/28
Fractional order viscoelasticity and theoretical progress in rheological constitutive law for rocks, Session: MR41A Elasticity, Plasticity, and Mechanical Properties of Mantle Minerals International-presentation

Yusuke Kawada, Takahiro Yajima, Hiroyuki Nagahama

2010 AGU Fall Meeting　2010/12/13
大地からの手紙 —兵庫県南部地震の前兆—

安岡由美, 石川徹夫, 長濱裕幸

平成22年度主任者部会年次大会 (第51回放射線管理研修会）　2010/11/05
高次空間における地震波の幾何学

長濱裕幸, 谷島尚宏

日本地質学会第117年学術大会　2010/09/18
浮遊性有孔虫室房の３次元形態解析

伊藤光, 佐々木, 理, 岩下智洋, ホワイトラビット, 長濱裕幸, 鹿納晴尚

日本地質学会第117年学術大会　2010/09
Linear relations among atmospheric radon concentration, air temperature, and net radiation in nighttime, and their implications International-presentation

Omori, Y, Nagahama, H, Ishikawa, Y, Kimura, A, Nagayama, M, Sekine, T

19th Symposium on Boundary Layers and Turbulence, August 2-8, 2010, Keystone, USA　2010/08/02
Electromagnetic signals prior to stick slip and microstructural development in simulated gouges International-presentation

Onuma, K, Muto, J, Nagahama, H, K. Otsuki

Earthquakes, Active Tectonics and Geodynamics of Island Arcs　2010/08
大気中ラドン濃度の夜間上昇に対する熱フラックス・気温変動の寄与, AAS001-P19, セッション: AAS001 大気化学

大森康孝, 長濱裕幸, 石川陽一, 高橋正人, 佐藤博明, 関根勉

日本地球惑星科学連合2010年大会　2010/05/23
Nocturnal evolution of atmospheric radon concentration under near-surface meteorological conditions, EGU2010-7481, Session: Basic Studies on Turbulence in Atmospheric and Oceanic Boundary Layer International-presentation

Omori, Y, Nagahama, H

EGU General Assembly 2010, May 2-8, 2010, Vienna, Austria　2010/05/02
地震先行現象としての電磁放射とラドン散逸：模擬断層ガウジによる実験的アプローチ

大沼久美, 武藤潤, 大森康孝, 長濱裕幸, 大槻憲四郎

「地震及び火山噴火予知のための観測研究計画」成果報告シンポジウム　2010/03/03
宮城県牡鹿半島におけるバイモーダルな大気中ラドン濃度変動

大森康孝, 東穂いづみ, 長濱裕幸, 石川陽一, 高橋正人, 佐藤博明, 関根勉

第11回環境放射能研究会　2010/03/01
宮城県牡鹿半島におけるバイモーダルな大気中ラドン濃度変動

大森康孝, 東穂いづみ, 長濱裕幸, 石川陽一, 高橋正人, 佐藤博明, 関根勉

第１１回「環境放射能」研究会　2010/03/01
Ｘ線ＣＴによる浮遊性有孔虫の内部構造と三次元計測

遠藤孝義, 佐々木理, 岩下智洋, 尾田太良, 長濱裕幸

６専攻合同シンポジウム「ヤングブレインズの連携による学際的研究の創造]　2010/02/16
Extended objects as topological singularities in non-Riemannian space International-presentation

Yajima, T, Nagahama, H, Wadati, M

The 44-th Symposium on Finsler Geometry　2009/09/08
Analysis of the temporal pattern of afterslip based on the constitutive law for viscoelastic behaviour of rocks

長濱裕幸, 川田祐介, 内田直希, 松澤暢

日本地質学会　2009/09/04
Ｘ線ＣＴによる浮遊性有孔虫の内部構造と三次元計測

遠藤孝義, 佐々木理, 岩下智洋, 尾田太良, 長濱裕幸

日本地質学会　2009/09/04
Ｘ線ＣＴによる浮遊性有孔虫の内部構造と三次元計測

遠藤孝義, 佐々木理, 岩下智洋, 尾田太良, 長濱裕幸

形の科学シンポジウム　2009/06/26
兵庫県南部地震前に増加した大気中ラドンの発生源に関する考察

安岡由美, 長濱裕幸, 川田祐介, 大森康孝, 下道國, 石川徹夫, 床次眞司, 橋本哲夫, 志野木正樹

日本保健物理学会第43回研究発表会　2009/06/03
ラドン散逸から見積もる大気電気パラメータの地震前駆変化

大森康孝, 長濱裕幸, 川田祐介, 安岡由美, 石川徹夫, 床次眞司, 志野木正樹

日本地球惑星科学連合2009年大会　2009/05/16
余効すべりの時系列パターンと岩石の力学的緩和挙動

川田祐介, 長濱裕幸, 内田直希, 松澤暢

日本地球惑星科学連合2009年大会　2009/05/16
Time-scale invariance in afterslip and mechanical relaxation of rocks International-presentation

Kawada, K, Nagahama, H, Uchida, N, Matsuzawa, T

Frontiers of Seismology　2009/04/02
地震先行現象としての電磁放射とラドン散逸：模擬断層ガウジによる実験的アプローチ

「地震及び火山噴火予知のための観測研究計画」地震発生先行過程部会　2009/02/16
Temporal power-laws in mechanical relaxation of rocks and afterslip associated with interplate earthquakes International-presentation

Kawada, Y, Nagahama, H, Uchida, N, Matsuzawa, T

The 2008 AGU Fall Meeting, 15-19 December, 2008, San Francisco, USA, Session: T53C Base of the Crustal Seismogenic Zone　2008/12/15
Anomalous radon release into the atmosphere prior to earthquakes around the Oshika Peninsula, NE Japan International-presentation

Omori, Y, Nagahama, H, Tohbo, I, Ishikawa, Y, Takahashi, M, Sato, H, Sekine, T

EMSEV-DEMETER Joint Workshop, September 7-12, 2008, Sinaia, Romania, 6.3, Session: 6 Imaging active faults, volcanoes, landslides and geothermal fields by EM methods. Integration of other methods: geophysical, geochemical, geological, etc.　2008/09/07
Skin depth of electromagnetic wave through fractal porous rocks International-presentation

Takahara, K, Muto, J, Nagahama, H

EMSEV-DEMETER Joint Workshop, September 7-12, 2008, Sinaia, Romania, 4.4, Session: 4 Generation and propagation mechanism of EM signals, and related laboratory experiments　2008/09/07
The generation of electrostatic field before the 2005 off-Miyagi earthquake (M 7.2) International-presentation

Tohbo, I, H. Nagahama, H, Omori, Y, Masuda, S, Tohoku Electric Power, Company, Inc

EMSEV-DEMETER Joint Workshop, September 7-12, 2008, Sinaia, Romania, 6.3, Session: 6 Imaging active faults, volcanoes, landslides and geothermal fields by EM methods. Integration of other methods: geophysical, geochemical, geological, etc.　2008/09/07
Unique variation of atmospheric radon concentration International-presentation

Omori, Y, Nagahama, H, Tohbo, I, Ishikawa, Y, Takahashi, M, Sato, H, Sekine, T

The 24th International Conference on Nuclear Tracks in Solids, September 1-5, 2008, Bologna, Italy, Session: Radiation environment monitoring　2008/09/01
Power-law and log-periodic changes in earthquake precursory phenomena prior to large earthquakes International-presentation

Kawada, Y, Nagahama, H, Yasuoka, Y, Omori, Y, Ishikawa, T, Tokonami, S, Shinogi, M

The 33rd International Geological Congress, 6-14 August, 2008, Oslo, Norway, Session: MAG-04 Scales, Scaling, Non-linearity and Complexity in the Geosciences　2008/08/06
Atmospheric electric field before the 2005 off-Miyagi earthquake (M 7.2) International-presentation

Tohbo, I, Nagahama, H, Omori, Y, Masuda, S, Tohoku Electric Power, Company, Inc

EGU General Assembly 2008　2008/05
Preseismic radon anomalies in atmosphere near the Oshika Peninsula, northeastern Japan International-presentation

Tohbo, I, Nagahama, H, Omori, Y, Ishikawa, Y, Takahashi, M, Sato

EGU General Assembly 2008　2008/05
Higher-order geometry of solitary waves in solid earth International-presentation

T. Yajima, H. Nagahama

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”　2007/09/18
Changes in atmospheric electrical conditions due to anomalous radon exhalation preceding large earthquakes International-presentation

Y. Omori, Y. Yasuoka, H. Nagahama, Y. Kawada, T. Ishikawa, S. Tokonami, M. Shinogi

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”　2007/09/18
Earthquake precursory phenomenon: an anomalous increase in atmospheric radon concentration International-presentation

H. Nagahama, Y. Kawada, Y. Omori, Y Yasuoka, T. Ishikawa, S. Tokonami, M. Shinogi

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”　2007/09/18
Electric dipoles during a stick-slip event of quartz pegmatite International-presentation

A. Takuchi, H. Nagahama, F. Freund

EASTEC symposium 2007: Dynamic Earth -its origin and future- (Sendai, Japan, 18-21 September, 2007). Organized by The 21st Century COE Program at Tohoku Univerisity, “Advanced Science and Technology Center for the Dynamic Earth”　2007/09/18
Soliton systems and Kawaguchi space International-presentation

T. Yajima, H. Nagahama

Conference on Differential Geometry. Lagrange and Hamilton Spaces.Dedicated to Acad. Prof. Dr. Radu Miron at his 80th anniversary　2007/09/03
Soliton systems and Zermelo condition in higher-order space International-presentation

T. Yajima, H. Nagahama

10th International Conference on Differential Geometry and Its Applications. In honour of the 300th anniversary of the birth of Leonhard Euler　2007/08/27
An anomalous increase in atmospheric radon prior to the Kobe earthquake International-presentation

Y. Yasuoka, H. Nagahama, Y. Kawada, Y. Omori, T. Ishikawa, S. Tokonami, M. Shinogi

. Bilateral Seminar Italy-Japan on Electromagnetics in Seismic and Volcanic Areas　2007/07/25
Nonlinear dynamical systems and KCC theory International-presentation

T. Yajima, H. Nagahama

Workshop on Finsler Geometry and its Applications　2007/05/28
Variation of electric parameters in atmosphere due to radon exhalation prior to a large earthquake International-presentation

Y. Omori, Y. Yasuoka, H. Nagahama, Y. Kawada, T. Ishikawa, S. Tokonami, M. Shinogi

General Assembly of the European Geosciences Union 2007, EGU 2007　2007/04/15
Temporal power-law change in rock magnetization prior to failure International-presentation

Y. Kawada, H. Nagahama, N. Nakamura

General Assembly of the European Geosciences Union 2007, EGU 2007　2007/04/15
Seismic ray path in an anisotropic medium from a view point of Finsler geometry International-presentation

T. Yajima, H. Nagahama

Symp. on Finsler Geom. at Kagoshima, Nov. 10-Nov.12 2006　2006/11/10
Differential geometry of nonlinear dynamical system: application to Rikitake dynamo system International-presentation

T. Yajima, H. Nagahama

European Geosciences Union General Assembly, Vienna, Austria, 02-07, April, 2006　2006/04/02
Irreversible thermodynamics and time-scale invariance for viscoelastic behaviour of rocks International-presentation

Y. Kawada, H. Nagahama

General Assembly of the European Geosciences Union 2006, EGU 2006 (Vienna, Austria, 2-7 April, 2006)　2006/04/02
Temporal power-laws on preseismic activation and aftershock decay affected by transient behavior of rocks International-presentation

Y. Kawada, H. Nagahama

The 4th International Workshop on Statistical Seismology, Statsei4 (Hayama (Kanagawa), Japan, 9-13 January, 2006)　2006/01/09
Local zero setting of thermoluminescence (TL) sources in milled quartz grains International-presentation

A. Takeuchi, T. Hashimoto

The 11th International Conference on Luminescence and Electro Spin Resonance Dating (LED 2005)　2005/07/25
Frictional discharge plasma and origin of fractal seismo-electromagnetic radiation International-presentation

J. Muto, H. Nagahama, T. Miura, I. Arakawa

21COE International Symposium 2005, Spatial and Temporal Fluctuations in the Solid Earth, - Clues to the Future of Our Planet -　2005/07/22
Seismic ray theory from a view point of Kawaguchi space International-presentation

T. Yajima, H. Nagahama

21COE International Symposium 2005, Spatial and Temporal Fluctuations in the Solid Earth, - Clues to the Future of Our Planet -　2005/07/22
Scaled Langevin equation and the inversion for viscoelastic behaviour of rocks in seismic time-scale: theoretical approach International-presentation

Y. Kawada, H. Nagahama, H. Hara

21COE International Symposium 2005, Spatial and Temporal Fluctuations in the Solid Earth, - Clues to the Future of Our Planet -　2005/07/22
Scaled Langevin equation and the inversion for viscoelastic behaviour of rocks International-presentation

Y. Kawada, H. Hara

The 15th Conference on Deformation Mechanisms, Rheology and Tectonics　2005/05/02
Scaled Langevin equation and the inversion for viscoelastic behaviour of rocks International-presentation

Y. Kawada, H. Hara

The General Assembly of the European Geosciences Union (EGU)　2005/04/24
Electric discharge plasma from frictional nature quartz: One origin of seismo-electromagnetic radiation International-presentation

J. Muto, T. Miura, I. Arakawa

The 4th IWSE (International Workshop on Seismo Electromagnetics)　2005/03/15
Electric-discharge luminescence between frictional natural quartz by pin-on-disk method: Possible origin of seismo-electromagnetic radiation International-presentation

J. Muto, T. Miura, I. Arakawa

2004 America Geophysical Union Fall Meeting　2004/12/13
Micromorphic continuum with defects and lattice preferred orientation: Application to seismic anisotropy in polycrystals International-presentation

J. Muto, Y. Kawada

Workshop on "Probing Earth Media Having Small-Scale Heterogeneities"　2004/11/22
Seismic ray path in anisotropic medium based on higher-order geometry International-presentation

T. Yajima

Workshop on "Probing Earth Media Having Small-Scale Heterogeneities"　2004/11/22
Infrared lattice vibrational modes and hydrolytic weakening of dynamically recrystallized quartz International-presentation

J. Muto, T. Hashimoto

2nd International workshop on Water Dynamics　2004/11/11
Infrared vibrational modes of recrystallized quartz in nature high-strain Zone International-presentation

J. Muto, T. Hashimoto

32nd International Geological Congress　2004/08/20
Strain weakening of nature recrystallized quartz by hydrous point defects International-presentation

J. Muto, T. Hashimoto

Gordon Research Conference, The Role of Water in Rock Deformation. Mount Holyoke College, South Hadley, Massachusetts　2004/08/08
TL property of quartz grain surface International-presentation

A. Takeuchi, T. Hashimoto

The Thermoluminescence and Optically Stimulated Laboratory and the Department of Earth Sciences, Dalhousie University are pleased to sponsor the 3rd New World Luminescence Dating Workshop　2004/07/04
Viscoelastic relaxation behaviours and temporal fractal properties for rocks and clays International-presentation

Y. Kawada

The Symposium Tectonics on Human Time Scales June 1 to 4, 2004 organized by Collaborative Research Center SFB 526 "Rheology of the Earth"　2004/06/01
Mechanical phase transition for viscoelastic relaxation behavior of rocks: introducing “free-space volume for solids” International-presentation

Y. Kawada, H. Hara

The 4th International Conference "Fractals and Dynamic Systems in Geoscience"　2004/05/19
Charge releasing of charge trapping center on milled quartz grains International-presentation

A. Takeuchi, T. Hashimoto

AGU, 2003 Fall Meeting　2003/12/08
New micro-IR spectroscopic mapping: Application to natural quartz International-presentation

J. Muto, T. Hashimoto

First International Meeting on Applied Physics (APHYS-2003)　2003/08/14
Fractal properties of dynamic recrystallized grain boundaries International-presentation

M. Takahashi

International conference of processing & manufacturing of advanced materials (THERMEC'2003)　2003/07/07
Symmetropy, earthquakes and SOC: A quantitative measure to monitor anisotropy and entropic heterogeneity International-presentation

K.Nanjo, H. Nagahama, E. Yodogawa

IUGG2003 International Association of Seismology and Physics of the Earth's Interior Hagiwara Symposium on Monitoring and Modeling of Earthquakes and Volcanic Processes for Prediction Development of various monitoring system, XXIII General assembly of the　2003/06/30
Fabric transitions of Quartz C-axis: Influence of hydrogen defects International-presentation

J. Muto, H. Nagahama, T. Hashimoto

JSS05 Physics and Chemistry of Earth Materials (IASPEI, IAVCEI, IAGA) XXIII General assembly of the International Union of Geodesy and Geophysics in Sapporo　2003/06/30
Thermorheological constitutive flow laws for rocks with transient behavior International-presentation

Y. Kawada

JSS05 Physics and Chemistry of Earth Materials (IASPEI, IAVCEI, IAGA) XXIII General assembly of the International Union of Geodesy and Geophysics in Sapporo　2003/06/30
Disappearance of Al-hole center in surface disordered layer of quartz particles International-presentation

A. Takeuchi, T. Hashimoto

JSS05 Physics and Chemistry of Earth Materials (IASPEI, IAVCEI, IAGA) XXIII General assembly of the International Union of Geodesy and Geophysics in Sapporo　2003/06/30
Fractal structures of spatial distributions of aftershocks and active faults International-presentation

K. Nanjo

Meeting / Conference: EAE03-A-01693, "EGS - AGU - EUG Joint Assembly　2003/04
Fabric transitions of quartz C-axis induced by hydrogen defects International-presentation

J. Muto, T. Hashimoto

Meeting / Conference: EAE03-A-08040, "EGS - AGU - EUG Joint Assembly　2003/04
A high-temperature viscoelastic constitutive law for rocks with transient behavior International-presentation

Y. Kawada

Meeting / Conference: EAE03-A-08126, "EGS - AGU - EUG Joint Assembly　2003/04
Radiation characteristic and scaling law of seismo-electric field, EMC-2002 International-presentation

A. Takeuchi

3rd International Symposium on Electromagnetic Compatibility　2002/05/21
Flow and slips in S-C mylonites: geological implication of seismogenetic processes International-presentation

N. Nakamura

International Symposium on Slip and Flow Processes in and below the Seismogenic Region　2001/11/05
Voltage-changes induced by stick-slips of granites International-presentation

A. Takeuchi

2001 Asia-Pacific Radio Science Conference, AP-RASC'01　2001/09
Symmetry in the self-organized criticality International-presentation

5th Congress & Exhibition ISIS-Symmetry, July　2001/07
Application of fractal cell dynamics model to the recrystallized grain boundaries International-presentation

International Workshop on Nano-materials, Saha Institute of Nuclear Physics　2001/02/05
監視モニタによる空気中ラドン濃度測定の検討

三浦直, 吉井未来, 安岡由美, 床次眞司, 長濱裕幸, 向高弘

第69回日本薬学会関西支部総会・大会 2019年10月12日日本薬学会関西支部　2019/10/12

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Research Projects 24

地震前兆電磁気現象 Competitive

System: Cooperative Research

2006/04 - Present
Continuum Theory of Dislocation Competitive

1996/04 - Present
Study on Rheology of Rocks and Lithosphere Competitive

1990/04 - Present
Study on Fractal Properties of Rock Fractures Competitive

System: Basic Science Research Program

1990/04 - Present
破壊実験と断層調査から解明する地震のエネルギー散逸過程

長濱裕幸, 武藤潤, 奥村聡, 河野義生, 澤燦道

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 東北大学

2024/04/01 - 2027/03/31
Earthquake and Volcano Hazards Observation and Research Program

Offer Organization: Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan

2024/04 -

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his study was supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan under its Earthquake and Volcano Hazards Observation and Research Program (1207, THK_10, THK_08 given to H.N.).
Formation theory and strengthen principle of kink folds: differential geometrical approach

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Institution: Tohoku University

2021/04/01 - 2023/03/31
n situ observation of fracture propagation of rocks and fault damage by synchrotron ultra fast X ray imaging

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2020/04 - 2023/03
微分幾何学を取り入れたキンク褶曲形成理論とキンク強化理論 Competitive

長濱裕幸

Offer Organization: 文部科学省

System: 新学術領域公募研究

2019/04 - 2021/03

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本研究では、新学術領域研究「ミルフィーユ構造の材料科学－新強化原理に基づく次世代構造材料の創製－」のA03領域の計画研究（ミルフィーユ構造のキンク理論構築）に参画し、微分幾何学を取り入れた非リーマン塑性論によるキンク褶曲形成とキンク強化の理論（普遍原理・概念）を構築することを目指す。
Experimental study on mechanical properties of plate interface of the northeastern Japan subduction zone

NAGAHAMA Hiroyuki, MUTO Jun, NAGASE Toshiro, SHIMIZU Ichiko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2012/04 - 2015/03

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In order to reveal the mechanism of the 2011 Tohoku Oki earthquake and subsequent post-seismic deformation of the northeastern Japan, we have conducted deformation experiments of a wide variety of rocks composing subduction zones. By the friction experiments using gas rig, frictional stability of quartz gouge is observed to be correlated to energy ratio of the gouge controlled by internal structure of gouges. Moreover, rupture velocity of serpentinites and olivine gouges depends on the their frictional coefficients and normal stress, implying that the slow slip in subduction zones illuminates the stress state of the plate boundary. By the shear experiments using Griggs rig, deformation mechanisms and creep strengths of feldspars are significantly reduced by the presence of water added externally into the samples under the lower crustal condition. We also proposed rheological models of the NE Japan island arc-trench systems and plate boundary causing the 2011 Tohoku Oki earthquake.
地震に先行する大気中ラドン濃度変動に関する観測

長濱裕幸

Offer Organization: 文部科学省

2013/11 -
地震発生先行過程に伴うラドン放出・電磁気現象と地殻変形 Competitive

長濱裕幸

Offer Organization: 文部科学省

2012/04 - 2013/10
Fractal, electromagnetic and radiation properties of earthquake faults and the state-of-stress problem

NAGAHAMA Hiroyuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2004 - 2005

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1.Analysis of the fractal, electromagnetic and radiation properties of earthquake faults : By using the apparatus of dielectric permittivity bought by Grant-in-Aid for Scientific Research (10740235) and NaI scintillation survey meters and gamma-radiation spectrometer bought by this Grant-in-Aid, I studied the fractal, electromagnetic and radiation properties (i.e., dielectric permittivities, IR, CL, TL, frictional discharge plasma, radionuclide channels and atmospheric electricity variation) of fault rocks or fault zones. From the results from the Grant-in-Aids for Encouragement of Young Scientist and Scientific Research (07854024, 08740389, 10740235 and 12640436), this study proposed some relationships among each parameter on faults and the fractal, electromagnetic and radiation properties of fault rocks or fault zones. Moreover, some relations between their properties and deformation of earthquake faults (e.g., Futaba fault, Asahiyama monoclinal flexure and Sue fault) were discussed. 2.Geological piezometer and strain-meter of earthquake faults : Based on the relation between the experimental data in my laboratory and measured data in nature, some relationships between the fractal and electromagnetic properties of earthquake faults were proposed. Moreover, a nonlinear transient mechanical behavior and time-temperature superposition principle of crustal rocks were investigated. 3.Strength and strain of lithosphere and a real earthquake fault model : Based on the fractal, electromagnetic and radiation properties of fault rocks and fault zones, the various physical conditions of earthquake faults were investigated. The research by this Grant-in-Aid for Scientific Research (C) cleared the state-of-stress problem in order to propose a real model for earthquake faults. Moreover, based on the fractal, electromagnetic and radiation properties of fault rocks and fault zones, the electromagnetic structures (potentials) and their sources in earthquake faults or before big earthquakes induced in the state-of-stress were investigated. Some of these results have been published and others are now submitted for the publication of international journals.
Fractal and electromagnetic properties of shear zones and the state-of-stress problem

NAGAHAMA Hiroyuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2002 - 2003

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1.Analysis of the fractal and electromagnetic properties of shear zones : By using the apparatus of dielectric permittivity which were bought by Grant-in-Aid for Scientific Research (10740235), I studied the fractal and electromagnetic properties (i.e., dielectric permittivities, IR,CL and TL) of fault rocks. From the results from the Grant-in-Aids for Encouragement of Young Scientist and Scientific Research (07854024,08740389,10740235 and 12640436), this study proposed some relationships among each parameter on faults and the fractal and electromagnetic properties of fault rocks. Moreover, some relations between their properties and deformation of shear zones were discussed. 2.Geological piezometer and strain-meter of shear zone : Based on the relation between the differential geometry and physical field (physical interaction filed), the relationships between the fractal and electromagnetic properties of shear zones were proposed. Moreover, a nonlinear wear model of natural fault rocks and a geological piezometer of fault rocks were proposed, and a nonlinear transient mechanical behavior and time-temperature superposition principle of crustal rocks were investigated. 3.Strength and strain of lithosphere and a real shear zone model : Based on the fractal and electromagnetic properties of fault rocks, the various physical conditions of shear (fault) zones were investigated. Using the piezometer and strain-meter of fault rocks, the strength and strain of lithosphere were estimated, and this research cleared the state-of-stress problem in order to propose a real model for shear (fault) zones. Moreover, based on the fractal and electromagnetic properties of fault rocks, the electromagnetic structures (potentials) and their sources in shear (fault) zones induced in the state-of-stress were investigated. Some of these results have been published and others are now submitted for the publication of international journals.
Fractal and electromagnetic properties of fault rocks and the state-of-stress problem

NAGAHAMA Hiroyuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2000 - 2001

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1. Analysis of the fractal and electromagnetic properties of fault rocks : By using the apparatus of magnetic susceptibility and dielectric permittivity which were bought by Grant-in-Aid for Scientific Research (10740235), I studied the fractal and electromagnetic properties (i.e., magnetic susceptibilities and dielectric permittivities) of fault rocks. From the results from the Grant-in-Aids for Encouragement of Young Scientist and Scientific Research (07854024, 08740389, 10740235 and 12640436), this study proposed some relationships among each parameter on faults and the fractal and electromagnetic properties of fault rocks. Moreover, some relations between their properties and deformation of faults were discussed. 2. Geological piezometer of fault rocks based on wearing of rocks or ceramics : Based on the wear theory of rocks or ceramics, a nonlinear wear model of natural fault rocks and a geological piezometer of fault rocks were proposed. 3. Strength and strain of lithosphere and a real fault model : Based on the fractal and electromagnetic properties of fault rocks, the physical condition of fault formations. Using the piezometer and strain-meter of fault rocks proposed by this Grant-in-Aid for Scientific Research (10740235), the strength and strain of lithosphere were estimated and a real fault model was proposed. Moreover, based on the fractal, electromagnetic and wear properties of rocks or ceramics, this research cleared the state-of-stress problem and the electromagnetic structures (potentials) of a fault (shear) zone induced in the state-of-stress. Some of these results have been published and others are now submitted for the publication of international journals.
断層破砕帯内物質のフラクタル電磁気的特性と地殻応力に関する研究

長濱裕幸

Offer Organization: 日本学術振興会

System: 科学研究費助成事業奨励研究(A)

Category: 奨励研究(A)

Institution: 東北大学

1998 - 1999

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1.断層破砕帯内物質のフラクタル電磁気的特性の解析:現有の岩石帯磁率・岩石誘電率測定器(申請のサンプルホルダーと測定制御用ソフトウェアを購入使用)を用いてコアラーにて採取した破砕帯内物質試料のフラクタル電磁気的特性(岩石比抵抗・岩石帯磁率・岩石誘電率)の測定をおこなった。平成10年度研究実績と連動して測定されたフラクタル電磁気的特性値と各種幾何学的フラクタル特性値とを比較し各種パラメータ間の相関や、フラクタル電磁気的特性値と断層破砕度や歪との相関を求めた。 2.岩石脆性破壊実験のデータとの比較解析と断層破砕帯内物質(断層面も含む)に関する地質応力・歪計の提出:物質の変形特性を扱うトライボロジーの知識を用いて、断層破砕帯内物質(断層面も含む)に関する天然のフラクタル特性データと実験データを整理し解析した。この際、現有のコンピュータを用いてデータを解析し、断層破砕帯内物質形成に関する破壊の非線形構成則(岩石の破壊特性の時間的変化)を決定し、断層破砕帯内物質形状に関する地質応力・歪計の解明を試みた。 3.地殻の応力レベルの見積もりと現実的な脆性断層モデルの提出:断層破砕帯内物質のフラクタル特性から断層の形成条件や形成場(地殻の強度・不均一度・断層の成熟度・深さに伴う断層破砕帯の広がりなど)について言及し、平成11年度研究計画2で得られた地質応力・歪計を用いて脆性領域における地殻の応力(強度)・歪レベルの算出をおこなった。また、平成10年度研究実績の結果をふまえて現実的な脆性的断層モデルを提出した。さらに、平成11年度研究計画1の結果から破砕帯内物質のフラクタル電磁気的特性値と岩石破壊(摩耗)実験によるデータを用いて、地殻の応力問題や地殻応力場内で形成される断層破砕帯の電磁気的構造の解明を試みた。
地震の熱力学的研究

長濱裕幸

Offer Organization: 日本学術振興会・ポーランド科学アカデミ

System: 特定国派遣研究員

Institution: ポーランド科学アカデミー地球物理研究所（PAN)

1997/04 - 1998/03
断層破砕帯内の割れ目系のフラクタル特性と地殻応力に関する研究

長濱裕幸

Offer Organization: 日本学術振興会

System: 科学研究費助成事業奨励研究(A)

Category: 奨励研究(A)

Institution: 東北大学

1996 - 1996

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本研究は、次のような研究計画・方法に基づいて実施した。 1.断層破砕帯内の割れ目形状の現地測定:近畿・中部日本の主要活断層。構造線沿いの断層破砕帯内の割れ目の採取調査(重点調査地点20ヶ所、40日間)を行った。 2.断層パラメータ(破砕物の厚さ・断層の長さ・移動量・起震時マグニチュード)の調査見積り:各サイズの断層系を詳細に調査し断層パラメータ間の相関から起震時の応力降下値や活動の再来周期を見積った。 3.断層破砕帯内の割れ目形状の3次元定量解析:表面粗さ測定器を用いて天然の断層破砕内の割れ目形状の定量的解析をおこなった。また、これらの断層系形状の特性をフラクタル幾何学の知識を用いて定量的に解析した。 4.岩石脆性破壊実験のデータとの比較解析と断層破砕帯内の割れ目形状に関する地質応力計の提出:物質の変形特性を扱うトライボロジーの知識を用いて、断層破砕帯内の割れ目形状に関する天然のフラクタル特性データと実験データを整理し解析した。この際、コンピュータを用いてデータを解析し、断層破砕帯内の割れ目形成に関する破壊の非線形構成則(岩石の破壊特性の時間的変化)を決定し、断層破砕帯内の割れ目形状に関する地質応力計を確立した。 5.地殻の応力レベルの見積もりと現実的な脆性断層モデルの提出:断層破砕帯内の割れ目形状のフラクタル特性から断層破砕帯内の割れ目の形成条件や形成(地殻の強度・不均一度・断層の成熟度・深さに伴う断層破砕帯の広がりなど)について言及し、さらに本研究で得られた地質応力計を用いて脆性領域における地殻の応力レベルの算出をおこない、研究計画2の結果をふまえて現実的な脆性的断層モデルを提出した。
断層系形状のフラクタル特性と地殻応力に関する研究

長濱裕幸

Offer Organization: 日本学術振興会

System: 科学研究費助成事業奨励研究(A)

Category: 奨励研究(A)

Institution: 東北大学

1995 - 1995

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本研究は、次のような研究計画・方法に基づいて実施した。 1.断層系形状の現地測定:近畿・中部日本の主要活断層・構造線沿いの断層系形状の採取調査(重点調査地点20ヶ所、40日間)を行った。 2.断層パラメータ(破砕物の厚さ・断層の長さ・移動量・起震時マグニチュード)の調査見積り:各サイズの断層系を詳細に調査し断層パラメータ間の相関から起震時の応力降下値や活動の再来周囲を見積った。 3.断層系形状の3次元定量解析:表面粗さ測定器を用いて天然の断層系形状の定量的解析をおこなった。また、これらの断層系形状の特性をフラクタル幾何学の知識を用いて定量的に解析した。 4.岩石脆性破壊実験のデータとの比較解析と断層系形状に関する地質応力計の提出:物質の変形特性を扱うトライボロジーの知識を用いて、断層系形状に関する天然のフラクタル特性データと実験データを整理し解析した。この際、コンピュータを用いてデータを解析し、断層破砕物形成に関する摩耗の非線形構成則(岩石の摩耗特性の時間的変化)を決定し、断層系形状に関する地質応力計を確立した。 5.研究費で購入した帯磁率測定器を用いて断層系の変形度を見積もるとともに、そのフラクタル特性データとの比較を行った。 6.地殻の応力レベルの見積もりと現実的な脆性断層モデルの提出:断層系形状のフラクタル特性から断層の形成条件や形成(地殻の強度・不均一度・断層の成熟度・深さに伴う断層破砕帯の広がりなど)について言及し、さらに本研究で得られた地質応力計を用いて脆性領域における地殻の応力レベルの算出をおこない、研究計画2の結果をふまえて現実的な脆性的断層モデルを提出した。
断層面形状のフラクタル特性と地殻応力に関する研究

長濱裕幸

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 奨励研究(A)

Institution: 東北大学

1994 - 1994

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1.断層面サンプルの採集と断層分布形態調査:近畿・中部日本の主要活断層・構造線沿いの断層面サンプルの採集と断層分布形態調査(重点調査地点20ヶ所、40日間)をおこなった. 2.断層面形状の三次元定量解析:科研費で購入した表面粗さ測定器を用いて天然断層面の三次元的形状の定量的解析をおこなった.また,採取した断層面をポリエステル樹脂で補強し,薄片法(微細構造の解析)とSEM像によっても同時に同一サンプルを用いて断層面形状の測定をおこなった.これらの断層面形状の特性をフラクタル幾何学の知識を用いて定量的に解析し,測定スケールによらない断層面の三次元的な広がりを把握した.さらにこの断層面形状に関するフラクタル特性値と断層内物質のフラクタル特性値(平成5年度文部省科研費を用いて既に測定済み)との相関を明らかにした. 3.岩石脆性破壊実験のデータとの比較解析と断層面形状に関する地質応力計の提出:物質の変形特性を扱うトライボロジーの知識を用いて,断層面形状に関する天然のフラクタル特性データと既に入手した岩石破壊実験データ及び破壊面形状データを整理し解析した.この際,断層面形成に関する岩石摩耗の非線形構成則(岩石の摩耗特性の時間的変化)を決定し,断層面形状に関する地質応力計を確立した. 4.地殻の応力レベルの見積りと現実的な脆性断層モデルの提出:断層面形状のフラクタル特性から断層の形成条件や形成場(地殻の強度・不均一度・断層の成熟度・深さに伴う断層面形状の広がりなど)について言及し,さらに本研究で得られた地質応力計を用いて脆性領域における地殻の応力レベルの算出をおこなった.研究計画3の結果を日本列島における活断層分布形状に応用し,地殻の応力(強度)分布図を作成した.
Development of fast-operating servo-controlled loading frame for studying earthquake generating processes

SHIMAMOTO Toshihiko, NAGAHAMA Hiroyuki, KANAGAWA Kyuichi, SHIMIZU Ichiko, NAKASHIMA Satoru, TORIUMI Mitsuhiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Developmental Scientific Research (B)

Category: Grant-in-Aid for Developmental Scientific Research (B)

Institution: The University of Tokyo

1993 - 1994

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The main task of the present research project has been (1) to develope a new fast-response servo-controlled loading system for studying fault constitive properties while controlling unstable fault motion, (2) to establish a realistic fault model through the analyzes of intrafault processes in fault rocks and through high temperature experiments producing the same processes as recognized in deep fault zones, and (3) to perform basic researches on rock rheology and propose rheological models for the lithosphere and plate boundaries. A new servo-controlled testing machine capable of 200Hz cyclic testing under the dynamic loading to 500kN was designed and built during the official period of this project, and the machine can now be used as a high temperature (to 1,000ﾟC) biaxial machine combined with a horizontal press and a furnace that were built with other funds. The machine is extended now as a conventional triaxial testing machine with good capability of permeability measurements and will open ways for studying constitutive properties of deep faults. Other results are as follows. (1) Complete transition from brittle, through intermediate, to fully plastic deformation under extreme shear has been studied for halite and halite-calcite mixed shear zones at temperatures increasing linearly with an increase in the normal stress to the fault (as in the case of geothermal gradient). Previous fault models were all denied and a new fault and plate-boundary model was proposed. (2) Rheological model has revealed unique features of island arc lithosphere and explains tectonics and seismicity of Japanese islands. A new rheological model of subducting plate boundaries was proposed so account for the extream variation of interplate thrust-type earthquakes as revealed by comparative subductology. (3) Harper-Dorn creep was proposed based on existing experimental data on various materials including minerals. Predictions from power-law creep will be changed substantially if this is the case. (4) Shimizu's theory of non-equilibrium thermodynamics was extended and applied to intracrystalline diffusion creep.
断層内物質のフラクタル特性と地殻応力に関する研究

長濱裕幸

Offer Organization: 日本学術振興会

System: 科学研究費助成事業奨励研究(A)

Category: 奨励研究(A)

Institution: 静岡大学

1993 - 1993

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1.断層内物質の採集:近畿・中部日本の主要活断層・構造線沿いの断層内物質の採集調査(重点調査地点20ケ所、40日間)をおこなった。 2.断層パラメータ(磁砕物の厚さ・断層の長さ・移動量・起震時マグニチュード)の調査見積:各サイズの断層を詳細に調査し断層パラメータ間の相関から起震時の応力降下値や活動の再来周期を見積った。 3.断層内物質の解析:断層粘土や断層破砕物の累積重量百分率分析(6%過酸化水素・ピロリン酸ナトリウムの使用による試料の分散とフルイ測定)とその電子比重計(ED-120T型)による比重の測定をおこなった。また、薄片法(微細構造の解析)とSEM像による断層内物質の粒度分布の測定をおこなった。 4.岩石脆性破壊実験のデータとの比較解析と断層内物質に関する地質応力計の提出:物質の変形特性を扱うトライボロジーの知識を用いて、断層内物質に関する天然のフラクタル特性データと実験データを整理し解析した。この際、購入したのコンピューターを用いてデータを解析し、断層破砕物形成に関する磨耗の非線形構成則(岩石の磨耗特性の時間的変化)を決定し、断層内物質に関する地質応力計を確立した。 5.地殻の応力レベルの見積と現実的な脆性断層モデルの提出:断層内物質のフラクタル特性から断層の形成条件や形成場(地殻の強度・不均一度・断層の成熟度・深さに伴う断層破砕帯の広がりなど)について言及し、さらに本研究で得られた地質応力計を用いて脆性領域における地殻の応力レベルの算出をおこない、研究計画2の結果をふまえて現実的な脆性的断層モデルの提出した。以上の研究にともなう成果の一部は既に雑誌等に公表または印刷中である。
地震予知基礎研究としての現実的な断層モデルの確立

嶋本利彦, 長濱裕幸, 清水以知子, 金川久一, 佐藤比呂志

Offer Organization: 日本学術振興会

System: 科学研究費助成事業重点領域研究

Category: 重点領域研究

Institution: 東京大学

1992 - 1992

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本研究の目的は、深部断層岩の研究と室内における変形実験を通じで、大断層の力学モデルを確立し、地震の発生機構を解明するための基礎資料を得ることであった。本研究は単年度の研究であったが、以下のような研究成果を得た。北海道日高山脈西部と東部において主衝上断層の予備的な地質調査をおこない、地殻の中・下部で形成された深部断層帯の内部構造の概要を把握した。この断層帯は幅ほぼし1km前後におよんでおり、断層の中心部に向かうほど岩石は強し塑性変形を受けて細粒化してる。福島県の畑川破砕帯でも深部断層岩の調査をおこない、断層帯の複雑な内部構造を明らかにするとともに、塑性流動が卓越する条件下でも断層に沿って地震が発生した証拠でも見いだした。このような結果から、断層のレオロジー的性質を決めるのは、アルトラカタクレーサイトとかアルトラマイロナイトのような超微粒な岩石であることがわかる。現在、クレーサイトとかアルトラマイロナイトのような超微粒な岩石であることがわかる。現在、それらの微粒岩石の変形機構を詳細に検討し始めたところである。また、地震時の高速断層運動に伴う断層の変形様式を高速摩擦試験機を用いて調べ、摩擦溶融・高連断層運動時の断層破砕物形成のプロセスなどに関する新知見を得た(研究成果参照)。さらに、本科研費を用いて、高温二軸摩擦試験機用の加熱炉と実験試料作成用のホットプレスを製作し、現在最終の調整をおこなっているところである。深部断層帯の中心部を占める非常に細粒な岩石は粒径に依存する性質をもつ可能性があり、この影響を調べるための試料作成用にホットプレスを用いることができる。これらの装置の製作によって、粒径の影響も含めた断層の力学的性質を、無水条件下で調べるのに必要な実験施設が整った。
The Mechanism of Pseudotachylyte Generation and the Elucidation of the State-of-Stress Problem

SHIMAMOTO Toshihiko, FUJINO Kuyoshi, YOSHIDA Shizuo, TORIUMI Mitsuhiro, OHNAKA Mitiyasu, MATSUDA Tokihiko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for General Scientific Research (B)

Category: Grant-in-Aid for General Scientific Research (B)

Institution: Earthquake Research Institute, University of Tokyo

1990 - 1991

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The main tasks of the present research project have been (1) to determine whether the ultrafine matrix of PT is of melt origin or of crush origin, (2) to understand why PT are rare, and (3) to discuss the implications of the results from the former two tasks for the state-of-stress problem. The major results from the project are as follows. The matrix of PT is so fine-grained that it is not easy to delineate its origin. However, an entirely new method was found as a result of this project for testing the validity of the crush origin based on the analysis of the size distribution of clasts contained in PT (Shimamoto and Nagahama, 1991,1992). They showed that clasts contained in PT from the Musgrave Range, central Australia, obey a power-law size distribution with a fractal dimension of 1.5. This size distribution predicts that the ultrafine-grained matrix should occupy an area of 4-5 %, whereas the area of the matrix of PT amounts to about 60 %. Hence, the major part of the matrix cannot be regarded as the crush products. This result, together with textural evidence such as the development of microlites and corroded textures of clasts, strongly suggests the melt origin of the matrix of pseudotachylytes. This result has been substatiated with updated analysis based on a modified fractal size distribution of clasts from two other localities (Nagahama et al., 1994). We also have designed and built a new high-speed frictional testing machine to study the pseudotachylyte generating processes in laboratory. This was the major task for this project, and we have successfully produced frictional melt that is very similar to natural psedotachylytes. The findings from high-speed friction experiments are as follows. (1) Frictional melting is a disequilibrium phenomenon, (2) minerals with low melting temperature and presumably with less stability to rapid heating preferentially melt during the frictional melting, (3) frictional melt of granite is depleted in SiO_2 because quartz is most resistent to frictional melting, (4) temperature above 1,300 ﾟC was measured for the frictional melt of gabbro using a photo thermometer, and (5) thermal fracturing due to rapid temperature rise during frictional heating is important in the generation of clasts contained in pseudotachylytes. The results (3) is consistent with the results for some natural pseudotachylytes.

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Works 1

Mylonites along the Median Tectonic Line in Central Japan. 29th IGC Field Trip B16

1992/08 -

Type: Other

Social Activities 23

地震予知

2015/09/25 -

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科学番組「ガリレオＸ」
日本地震学会

2012/10 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地質学会

2012/09 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
SSH（Super High School）東北大学公開講座(宮城県仙台第一高等学校)

2012/07/14 -

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高大連携事業の一環として宮城県からお願いしていた講座を，宮城県仙台第一高等学校SSH（Super High School）事業の一環として実施
日本地球惑星連合大会

2012/05 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
「地震予知ここ警戒すべき」

2012/03/29 -
日本地震学会

2011/11 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
理学部紹介(仙台三高）

2011/10/06 -

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出前授業（東北大学理学部紹介）
産経新聞の記事「ラドンガス濃度震災前に急変動」を説明

2011/10/05 -
日本地質学会

2011/09 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地球惑星連合大会

2011/05 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
文部科学省「平成22年度大学教育改革プログラム合同フォーラム」

2011/01/25 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地震学会

2010/11 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地震学会

2010/10 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地質学会

2010/09 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地球惑星連合大会

2010/05 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地震学会

2009/10 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
日本地球惑星連合大会

2009/05 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
文教協会「大学教育改革プログラム合同フォーラム」

2009/01 -

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東北大学グローバルCOEプログラム変動地球惑星学の統合教育研究拠点活動紹介
阪神大震災も予知できていた！迫りくる巨大地震臨界点をズバリ誤差±１０日ラドン濃度予知法

2007/01/29 -

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兵庫県南部地震前兆の大気ラドン濃度上昇についての研究（神戸薬科大学安岡由美博士、放射線医学総合研究所石川徹夫主任研究員、東北大学地震・火山予知研究観測センター・五十嵐丈二教授、東北大学理学研究科地学専攻地圏進化学講座・長濱裕幸助教授との共同・継続研究）独立行政法人放射線医学総合研究所、１月１６日（火曜日）プレス発表による
放医研東北大など地震予知システムに応用ラドン濃度の異常変動データ

2007/01/19 -

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兵庫県南部地震前兆の大気ラドン濃度上昇についての研究（神戸薬科大学安岡由美博士、放射線医学総合研究所石川徹夫主任研究員、東北大学地震・火山予知研究観測センター・五十嵐丈二教授、東北大学理学研究科地学専攻地圏進化学講座・長濱裕幸助教授との共同・継続研究）独立行政法人放射線医学総合研究所、１月１６日（火曜日）プレス発表による
ラドン濃度震災前から上昇

2007/01/17 -

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兵庫県南部地震前兆の大気ラドン濃度上昇についての研究（神戸薬科大学安岡由美博士、放射線医学総合研究所石川徹夫主任研究員、東北大学地震・火山予知研究観測センター・五十嵐丈二教授、東北大学理学研究科地学専攻地圏進化学講座・長濱裕幸助教授との共同・継続研究）独立行政法人放射線医学総合研究所、１月１６日（火曜日）プレス発表による
都立三田高等学校：東北大学研究教育活動報告

2003/12 -

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都立三田高等学校：東北大学研究教育活動報告

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Media Coverage 10

地震前ラドン濃度低減ー地殻変動解明に期待ー

日刊工業新聞

2021/04/08

Type: Newspaper, magazine
東北大、大阪北部地震前の大気中ラドン濃度の減少を検出

日本経済新聞　インターネット電子版

2021/04/02

Type: Internet
東北⼤、潮汐に由来する⼤気中ラドン濃度の変動を検出

日本経済新聞社　インターネット電子版

2021/02/19

Type: Internet
「ラドンと電子数変化」

河北新報

2012/03/01

Type: Newspaper, magazine
大震災前に大気中ラドンガス濃度に変化が！今後の地震予測に期待！

TBSラジオ（森本毅郎・スタンバイ: ７時３０分ころ）

2011/11/13

Type: Other
Ｍ９級予知できず、なぜ？「想定外」？

産経新聞西日本版

2011/10/31

Type: Newspaper, magazine
Ｍ９級予知できず、なぜ？経験則に依存研究者反省 (大震災で方針転換)

産経新聞

2011/10/31

Type: Newspaper, magazine
「ラドンガス濃度震災前に急変動」を紹介

TBSラジオ森本毅郎・スタンバイ

2011/10/13

Type: Other
ラドンガス濃度震災前に急変動

産経新聞

2011/10/05

Type: Newspaper, magazine
兵庫県南部地震前に大気ラドンの濃度変動を観測：臨界現象数理モデルへ適応し地震予知にも活用

共同通信（東京新聞・熊本日日新聞・山陽新聞・京都新聞・四国新聞・西日本新聞など）

2007/01/16

Type: Newspaper, magazine

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兵庫県南部地震前兆の大気ラドン濃度上昇についての研究（神戸薬科大学安岡由美博士、放射線医学総合研究所石川徹夫主任研究員、東北大学地震・火山予知研究観測センター・五十嵐丈二教授、東北大学理学研究科地学専攻地圏進化学講座・長濱裕幸助教授との共同・継続研究）独立行政法人放射線医学総合研究所、１月１６日（火曜日）プレス発表によるhttp://www.nirs.go.jp/news/press/2006/01_16.shtml

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Other 31

地震発生先行過程に伴うラドン放出と地殻変形

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課題番号1202「宮城県沖プレート境界の多項目・高精度モニタリングによる大地震発生過程」での「地震発生先行過程に伴う電磁気現象・ラドン放出と地殻変形」昨年度までの公募研究から継続研究に移行
地震発生先行過程に伴うラドン放出と地殻変形

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課題番号1202「宮城県沖プレート境界の多項目・高精度モニタリングによる大地震発生過程」での「地震発生先行過程に伴う電磁気現象・ラドン放出と地殻変形」昨年度までの公募研究から継続研究に移行
地震発生先行過程に伴うラドン放出と地殻変形

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課題番号1202「宮城県沖プレート境界の多項目・高精度モニタリングによる大地震発生過程」での「地震発生先行過程に伴う電磁気現象・ラドン放出と地殻変形」昨年度までの公募研究から継続研究に移行
地震発生先行過程に伴うラドン放出と地殻変形

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課題番号1202「宮城県沖プレート境界の多項目・高精度モニタリングによる大地震発生過程」での「地震発生先行過程に伴う電磁気現象・ラドン放出と地殻変形」昨年度までの公募研究から継続研究に移行
地震発生先行過程に伴うラドン放出と地殻変形

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課題番号1202「宮城県沖プレート境界の多項目・高精度モニタリングによる大地震発生過程」での「地震発生先行過程に伴う電磁気現象・ラドン放出と地殻変形」昨年度までの公募研究から継続研究に移行
地震発生先行過程に伴うラドン放出と地殻変形

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課題番号1202「宮城県沖プレート境界の多項目・高精度モニタリングによる大地震発生過程」での「地震発生先行過程に伴う電磁気現象・ラドン放出と地殻変形」昨年度までの公募研究から継続研究に移行
摩擦すべりによる石英単結晶の粉砕化に関する共同研究

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摩擦すべりによる石英単結晶の粉砕化に関する共同研究共同研究者：中谷剣・武藤潤・西川治（秋田大学）
RI排気モニターがとらえた東北地方太平洋沖地震前の大気中ラドン濃度変動

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RI排気モニターがとらえた東北地方太平洋沖地震前の大気中ラドン濃度変動
Radon Anomaly in the Air Before the 2011 Tohoku Earthquake (MW = 9.0)

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東北地方太平洋沖地震(MW = 9.0)前の大気中ラドン濃度異常について
地殻岩石の塑性変形特性に関する共同研究

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地殻岩石の塑性変形特性に関する共同研究共同研究者：福田惇一、武藤潤
地震発生先行過程に伴うラドン放出と地殻変形

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地震発生先行過程に伴う電磁気現象・ラドン放出と地殻変形
ガス圧試験機を用いた岩石の弾性波速度測定に関する共同研究

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ガス圧試験機を用いた岩石の弾性波速度測定に関する共同研究共同研究者：玉井速汰・武藤潤・石川正弘（横浜国大）
地震発生先行過程に伴うラドン放出と地殻変形

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地震発生先行過程に伴うラドン放出と地殻変形
宮城県沖プレート境界の多項目

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宮城県沖プレート境界の多項目
変動地球惑星学の統合教育研究拠点

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変動地球惑星学の統合教育研究（事業推進担当者・広報委員長）
特色ある大学教育支援プログラム「融合型理科実験が育む自然理解と論理的思考」

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特色ある大学教育支援プログラム「融合型理科実験が育む自然理解と論理的思考」
転位（断層）周辺のJ−積分（経路積分不変性）とガウス・ボンネ定理との関係について

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転位（断層）周辺のJ−積分（経路積分不変性）とガウス・ボンネ定理との関係について
超高圧変成岩・ルチル離溶組織について

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超高圧変成岩・ルチル離溶組織について
兵庫県南部地震前兆と大気中ラドン濃度変化

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兵庫県南部地震前兆と大気中ラドン濃度変化
細倉鉱山鉱道内での地中電磁シグナル観測

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細倉鉱山鉱道内での地中電磁シグナル観測
地震に伴う大気電位変化とその発生メカニズムについて

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地震に伴う大気電位変化とその発生メカニズムについて
電磁ノイズ変化観測と地震前兆電磁気現象との関連について

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電磁ノイズ変化観測と地震前兆電磁気現象との関連について
宮城県沖地震前兆と大気放射能変動

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宮城県沖地震前兆と大気放射能変動
新潟県中越地震前兆と大気放射能変動

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新潟県中越地震前兆と大気放射能変動
Physics of Asymmetric and Degenerated Continua: Complex Relativity

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Physics of Asymmetric and Degenerated Continua: Complex Relativity
先端地球科学技術による地球の未来像創出

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先端地球科学技術による地球の未来像創出（事業推進担当者・研究運営委員）
摩擦放電プラズマと地震前兆電磁気現象に関する研究

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摩擦放電プラズマと地震前兆電磁気現象に関する研究
石英からの熱ルミネッセンスの摩砕による影響

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石英からの熱ルミネッセンスの摩砕による影響
摩砕石英粒子からの熱ルミネッセンス(TL)特性の粒径依存性と断層運動のTL年代測定について

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摩砕石英粒子からの熱ルミネッセンス(TL)特性の粒径依存性と断層運動のTL年代測定について
岩塩の電磁波減衰長について

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岩塩の電磁波減衰長について
EARTHQUAKE SOURCE ASYMMETRY, STRUCTURAL MEDIA AND ROTATION EFFECTS

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震源の非対称性・構造媒体・回転効果

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