Details of the Researcher

PHOTO

Daisuke Sugawara
Section
International Research Institute of Disaster Science
Job title
Associate Professor
Degree

  • 博士（理学）（東北大学）

  • 修士（理学）（東北大学）

e-Rad No.
50436078

Research History 3

  • 2020/03 - Present
    東北大学災害科学国際研究所

  • 2016/01 - 2020/02
    ふじのくに地球環境史ミュージアム

  • 2012/04 - 2015/12
    東北大学災害科学国際研究所

Research Areas 2

  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Disaster prevention engineering / earthquake, tsunami, sediment transport

  • Natural sciences / Solid earth science / geology, sedimentology

Papers 122

  1. High-precision estimation of a paleo-tsunami inundation area by identifying tsunami traces beyond sandy tsunami deposits: A case study of the 869 CE Jogan tsunami in Fukushima, northeastern Japan

    Kaito Komeiji, Tetsuya Shinozaki, Daisuke Sugawara, Takashi Ishizawa, Minoru Ikehara, Shigehiro Fujino

    Marine Geology　481　107490-107490　2025/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.margeo.2025.107490 　

    ISSN： 0025-3227

  2. Tracing the sources of paleotsunamis using Bayesian frameworks

    Erick R. Velasco-Reyes, Daisuke Sugawara, Bruno Adriano

    Communications Earth & Environment　2024/09/02

    DOI： 10.1038/s43247-024-01643-w 　

  3. Modeling the 2024 Noto Peninsula earthquake tsunami: implications for tsunami sources in the eastern margin of the Japan Sea

    Hidetoshi Masuda, Daisuke Sugawara, An-Chi Cheng, Anawat Suppasri, Yoshinori Shigihara, Shuichi Kure, Fumihiko Imamura

    Geoscience Letters　2024/06/14

    DOI： 10.1186/s40562-024-00344-8 　

  4. Machine learning and hydrodynamic proxies for enhanced rapid tsunami vulnerability assessment

    Anna Rita Scorzini, Mario Di Bacco, Daisuke Sugawara, Anawat Suppasri

    Communications Earth & Environment　2024/06/05

    DOI： 10.1038/s43247-024-01468-7 　

  5. Tsunami deposits highlight high-magnitude earthquake potential in the Guerrero seismic gap Mexico

    María Teresa Ramírez-Herrera, Néstor Corona, Jan Černý, Krzysztof Gaidzik, Daisuke Sugawara, Steven L. Forman, María Luisa Machain-Castillo, Avto Gogichaishvili

    Communications Earth & Environment　2024/04/12

    DOI： 10.1038/s43247-024-01364-0 　

  6. Reconstructing Historical Terrain to Elucidate the Causes of Disaster Occurrence and Improve Disaster Prevention Literacy

    Yuichi Ebina, Daisuke Sugawara

    Journal of Disaster Research　19　(1)　30-37　2024/02/01

    Publisher: Fuji Technology Press Ltd.

    DOI： 10.20965/jdr.2024.p0030 　

    ISSN： 1881-2473

    eISSN： 1883-8030

    More details Close

    This research collects and interprets historical information about topography from old maps and pictures, and constructs a method to reconstruct past topography on 3D graphics. Furthermore, from the restored historical topography, we will elucidate how the historical changes in the topography are related to today’s disaster situation, and visualize the disaster risk in the target area. We hope that the results of this research will contribute to the cultivation of disaster prevention awareness and the improvement of disaster prevention literacy.

  7. 津波による土砂移動数値計算のV&Vの提案

    Shuro YOSHIKAWA, Daisuke SUGAWARA, Shinya YAMAMOTO, Hidetoshi MASUDA, Fumihiko IMAMURA

    Japanese Journal of JSCE　80　(6)　n/a-n/a　2024

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/jscejj.23-00179 　

    eISSN： 2436-6021

  8. Differences in the earthquake preparedness of low- and high-income countries: the cases of Shizuoka prefecture, Japan, and the four provinces in Panay, Philippines

    Ramil B. Atando, Daisuke Sugawara

    Natural Hazards　2024/01

    DOI： 10.1007/s11069-023-06276-4 　

  9. Sensitivity of slip distribution on tsunami trace heights and geological evidences: a case study of the 2011 Tohoku-Oki earthquake

    Satoshi Kusumoto, Kentaro Imai, Takane Hori, Daisuke Sugawara, Kenji Satake

    Progress in Earth and Planetary Science　10　(1)　2023/08/25

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40645-023-00582-y 　

    eISSN： 2197-4284

    More details Close

    Abstract We examined whether it is possible to estimate the tsunami source model of the 2011 Tohoku-Oki earthquake from a comparison of numerical simulations of tsunami propagation and sediment transport, the measured trace heights, and the sediment thickness of tsunami deposits. Twelve models with different subfault numbers were prepared based on a reference model inferred from tsunami waveform inversion. The reference model with 55 subfaults considering rupture propagation and the model with instantaneous slip successfully reproduced both the tsunami trace heights and sediment thickness distribution of tsunami deposits in the Idagawa Lowland and Sendai Plain. Other models with the same moment magnitude but fewer subfaults could not reproduce the observed trace heights, and the reproducibility of sediment thickness distribution strongly depended on the slip distribution. Models with increased slip amounts and moment magnitude could reproduce the trace heights; however, the simulated sediment thickness was underestimated for the Idagawa Lowland while overestimated for the Sendai Plain. Our results indicate that the combination of trace heights, sediment thickness of tsunami deposits, and numerical simulations of tsunami propagation and sediment transport can be used to estimate historical earthquakes and tsunamis. Efforts should be made to increase the number of subfaults for the study of historical events, although the obtained solutions may not be unique because of fewer trace heights or tsunami deposit data.

  10. Paleotsunami history of Hachinohe, northern Japan: a multiproxy analysis and numerical modeling approach

    Erick R. Velasco-Reyes, Kazuhisa Goto, Daisuke Sugawara, Yuichi Nishimura, Takahiro Shinohara, Takashi Chiba

    Progress in Earth and Planetary Science　9　(1)　2022/12

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40645-022-00477-4 　

    eISSN： 2197-4284

    More details Close

    Abstract Paleotsunami studies along the Pacific coast of Tohoku, northern Japan, have been considerably developed recently, particularly after the massive impact of the 2011 Tohoku-oki tsunami. Nevertheless, in the southernmost Shimokita Peninsula, studies pertaining to paleotsunami are underdeveloped, leading to a vague understanding of the tsunamigenic sources northward of the Tohoku region, along with incomplete hazard evaluation. Paleotsunami deposits in Shimokita can be related not only to the Japan Trench along the Sanriku coast but also to the Kuril trench along the Pacific coast of Hokkaido. In this study, we unveiled the paleotsunami history of Hachinohe in northern Tohoku. Using a combination of sedimentological, geochemical, paleontological, and mineralogical proxies, we characterized seven sand layers that dated from ca. 2700 to ca. 5500 yr BP based on radiocarbon (14C) ages as event deposits of marine origin. Sedimentological and paleontological evidence coupled with ground-penetrating radar imagery revealed a marsh environment comprising successive extinct ponds, controlling the depositional environment. Numerical modeling ruled out the possibility of storms as genetic sources, leading to the conclusion that the presence of event deposits with marine sediments in the study area would be associated with tsunami inundation episodes. Based on 14C dating, the mean frequency of recurrence of tsunamis is estimated as 384 years (320–450 yr, 95% confidence interval) and a coefficient of variation of 0.78 (0.68–0.99, 95% confidence interval). The previously recorded limited paleotsunami evidence and absence of an estimated recurrence interval in the Shimokita Peninsula reaffirm the importance of Hachinohe as a tsunami record site for the activity of both trenches.

  11. Effect of artificial structures on the formation process of the 2011 Tohoku-oki tsunami deposits

    Yasutaka Iijima, Kazuhisa Goto, Daisuke Sugawara, Tomoya Abe

    Sedimentary Geology　423　2021/09/01

    Publisher: Elsevier B.V.

    DOI： 10.1016/j.sedgeo.2021.105978 　

    ISSN： 0037-0738

  12. Three thousand year paleo-tsunami history of the southern part of the Japan Trench

    Hokuto Higaki, Kazuhisa Goto, Hideaki Yanagisawa, Daisuke Sugawara, Takashi Ishizawa

    PROGRESS IN EARTH AND PLANETARY SCIENCE　8　(1)　2021/04

    DOI： 10.1186/s40645-021-00415-w 　

    ISSN： 2197-4284

  13. Numerical modeling of tsunami: advances and future challenges after the 2011 Tohoku earthquake and tsunami Peer-reviewed

    Daisuke Sugawara

    Earth-Science Reviews　103498-103498　2021/01

    Publisher: Elsevier BV

    DOI： 10.1016/j.earscirev.2020.103498 　

    ISSN： 0012-8252

  14. Spatial distribution and sources of tsunami deposits in a narrow valley setting - insight from 2011 Tohoku-oki tsunami deposits in northeastern Japan Peer-reviewed

    Tomoya Abe, Kazuhisa Goto, Daisuke Sugawara

    Progress in Earth and Planetary Science　7　(1)　2020/12

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40645-019-0318-6 　

    eISSN： 2197-4284

  15. Tsunamis and submarine landslides in Suruga Bay, central Japan, caused by Nankai–Suruga Trough megathrust earthquakes during the last 5000 years Peer-reviewed

    Akihisa Kitamura, Kazuyoshi Yamada, Daisuke Sugawara, Yusuke Yokoyama, Yosuke Miyairi, Miki Hirakawa, Daichi Iwatsuki, Satoru Katagiri, Masaya Maeda, Hideki Mori, Yuki Nakai, Sota Okazaki, Yui Sakamoto, Masaki Sasada, Yusuke Seki, Youki Takikawa, Yuka Yamamoto, Yuki Yoda

    Quaternary Science Reviews　245　106527-106527　2020/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.quascirev.2020.106527 　

    ISSN： 0277-3791

  16. Reconstruction of Late Holocene Extreme Hydrological Events of the Valentin Bay Coast, the Sea of Japan Peer-reviewed

    N. G. Razjigaeva, L. A. Ganzey, Yu. Nishimura, T. A. Grebennikova, D. Sugawara, Y. Takashimizu, I. I. Lebedev, A. O. Gorbunov, Kh. A. Arslanov, F. E. Maksimov, A. Yu. Petrov

    Russian Journal of Pacific Geology　14　(2)　180-192　2020/03

    Publisher: Pleiades Publishing Ltd

    DOI： 10.1134/s1819714020020086 　

    ISSN： 1819-7140

    eISSN： 1819-7159

  17. Historical and geological evidence for the seventeenth-century tsunamis along Kuril and Japan trenches: implications for the origin of the AD 1611 Keicho earthquake and tsunami, and for the probable future risk potential Peer-reviewed

    Hiroshi Tetsuka, Kazuhisa Goto, Yuichi Ebina, Daisuke Sugawara, Takashi Ishizawa

    Geological Society, London, Special Publications　501　(1)　SP501-2019　2020/01/07

    Publisher: Geological Society of London

    DOI： 10.1144/sp501-2019-60 　

    ISSN： 0305-8719

    eISSN： 2041-4927

  18. TSUNAMI-INDUCED SEDIMENT TRANSPORT SIMULATION USING BEDROCK DISTRIBUTION UNDER SEAFLOOR - CASE STUDY OF KESENNUMA BAY -

    YAMASHITA Kei, SUGAWARA Daisuke, ARIKAWA Taro, TAKAHASHI Tomoyuki, IMAMURA Fumihiko

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　76　(2)　I_427-I_432　2020

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.76.2_i_427 　

    ISSN： 1884-2399

    eISSN： 1883-8944

    More details Close

    Field survey of bathymetry, sediment and bedrock of the narrow in Kesennuma Bay have been investigated. Numerical simulations of tsunami-induced sediment transport during the 2011 Tohoku tsunami were also improved by using the bedrock and sediment dataset. After the tsunami, depositions at the center of the narrows, erosions at the sides and the north area, and depositions at the south area were confirmed. By utlizing the bedrock data, the reproducibility of the field modeling was improved although the erosion of the narrows was limited to the bedrock distribution. It was found that the introduction of the bedrock is important to prevent underestimation of flow velocity and topographic changes. Furthermore, the simulations with simple consideration of erosion resistance due to the geology showed that the effect of erosion resistance was small and within the range of conventional modeling. The erosion speed in the narrows was characterized during the rising and the stationary period of the Shields parameter.

  19. RECONSTRUCTION OF LATE HOLOCENE EXTREME HYDROLOGICAL EVENTS OF THE VALENTIN BAY COAST, THE SEA OF JAPAN Peer-reviewed

    N.G. Razjigaeva, L.A. Ganzey, Yu. Nishimura, T.A. Grebennikova, D. Sugawara, Y. Takashimizu, I.I. Lebedev, A.O. Gorbunov, Kh.A. Arslanov, F.E. Maksimov, A.Yu. Petrov

    Tikhookeanskaya Geologiya　39　(2)　90-103　2020

    Publisher: Yu. A. Kosygin Institute of Tectonics and Geophysics, Far Eastern Branch, RAS

    DOI： 10.30911/0207-4028-2020-39-2-90-103 　

    ISSN： 0207-4028

  20. Geologic evidence for coseismic uplift at ~ AD 400 in coastal lowland deposits on the Shimizu Plain, central Japan Peer-reviewed

    Akihisa Kitamura, Tomoya Ina, Daisuke Suzuki, Keito Tsutahara, Daisuke Sugawara, Kazuyoshi Yamada, Akira Aoshima

    Progress in Earth and Planetary Science　6　(1)　2019/12/01

    DOI： 10.1186/s40645-019-0305-y 　

    eISSN： 2197-4284

  21. Estimating a Tsunami Source by Sediment Transport Modeling: A Primary Attempt on a Historical/1867 Normal‐Faulting Tsunami in Northern Taiwan Peer-reviewed

    D. Sugawara, N. T. Yu, J. Y. Yen

    Journal of Geophysical Research: Earth Surface　124　(7)　1675-1700　2019/07

    Publisher: American Geophysical Union ({AGU})

    DOI： 10.1029/2018JF004831 　

    ISSN： 2169-9003

    eISSN： 2169-9011

  22. Modeling boulder transport by coastal waves on cliff topography: Case study at Hachijo Island, Japan Peer-reviewed

    Watanabe, M, Goto, K, Imamura, F, Kennedy A, SUgawara, D, Nakamura, N, Tonosaki, T

    Earth Surface Processes and Landforms　2019/06

  23. On tsunami sediment transport modeling and uncertainties Peer-reviewed

    Daisuke Sugawara

    The Quaternary Research (Daiyonki-Kenkyu)　58　(2)　187-194　2019/04/01

    Publisher: Japan Association for Quaternary Research

    DOI： 10.4116/jaqua.58.187 　

    ISSN： 0418-2642

    eISSN： 1881-8129

  24. POTENTIAL IMPACT OF TSUNAMI-INDUCED SEDIMENT TRANSPORT IN KOCHI PREFECTURE CAUSED BY THE NANKAI TROUGH MEGATHRUST EARTHQUAKE

    YAMASHITA Kei, SUGAWARA Daisuke, SETO Shuji, ARIKAWA Taro, TAKAHASHI Tomoyuki, IMAMURA Fumihiko

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　75　(2)　I_685-I_690　2019

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.75.I_685 　

    ISSN： 1884-2399

    More details Close

    <p> In order to evaluate coastal geomorphic changes and potential impacts of tsunami-induced sediment transport in Kochi Prefecture caused by the Nankai Trough megathrust earthquake, numerical simulations of sediment transport over a wide area of Tosa Bay have been performed. The regional features of potential impact was provided. The tsunami-induced sediment transport can cause not only large-scale erosion and sedimentation around the coastal zone but also increase in tsunami hazards. Note that the influences depend significantly on uncertainties in bed materials, i.e. grain sizes and distributions of erodible/noerodible surfaces. The uncertainties in the simulations will be improved through acquisition of detailed sedimentary data. Further discussions considering the regional characteristics of tsunami-induced sediment transport will provide the resilient countermeasures to tsunami disaster.</p>

  25. IMPROVEMENT OF TSUNAMI-INDUCED SEDIMENT TRANSPORT MODEL BY CONSIDERING SATURATED CONCENTRATION IN SUSPENSION WITH STRONG UNSTEADY FLOWS

    Kei YAMASHITA, Daisuke SUGAWARA, Taro ARIKAWA, Yoshinori SHIGIHARA, Tomoyuki TAKAHASHI, Fumihiko IMAMURA

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　Vol.74, No.2, pp.I_325-I_330　(2)　I_325-I_330　2018/11/10

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.74.I_325 　

    ISSN： 1884-2399

    eISSN： 1883-8944

    More details Close

    In this study, factors causing the underestimation of morphological changes due to tsunami-induced sediment transport in Kesennuma Bay with narrows during the Great East Japan Earthquake and Tsunami have been numerically investigaed. Based on the estimation, the saturated concentration of suspention model was improved. It was found out that strong unsdeady flows occerred at narrows. The numerical results from conventional saturated concentration model implied that at the narrows, suspension concentration and sediment supply from the bottom to the suspension were limited by high concentration in suspension, leading to underestimation of morphological change, i.e., erosion and deposition. By considering effects of strong unsteady flows on concentration of suspention, a new form of saturated concentration model based on log-wake law and Kármán constant theory has been proposed. Numerical results of the erosion and deposition in Kesennuma Bay were improved. It is expected that accuracy of evaluation about not only morphological changes but also inundation area and damages are improved.

  26. Study on setting of saturation concentration of suspended sediment in numerical simulation of sediment transport associated with tsunami for off Takahama Bay

    村上嘉謙, 志方建仁, 殿最浩司, 菅原大助, 平石哲也

    自然災害科学　37　(2)　165‐176　2018/08/31

    ISSN： 0286-6021

  27. Could tsunami risk be underestimated using core-based reconstructions? Lessons from ground penetrating radar

    Hiraku Takeda, Kazuhisa Goto, James Goff, Hideaki Matsumoto, Daisuke Sugawara

    Earth Surface Processes and Landforms　43　(4)　808-816　2018/03/30

    Publisher: John Wiley and Sons Ltd

    DOI： 10.1002/esp.4282 　

    ISSN： 1096-9837 0197-9337

    eISSN： 1096-9837

  28. Coastal geomorphology and tsunamis: a preliminary examination of the case of Iruma, Minami-Izu, Shizuoka

    菅原大助

    環境考古学と富士山　(2)　3‐12　2018/03/24

  29. 津波砂移動計算時の飽和浮遊砂濃度設定による砂移動特性への影響

    松田周吾, 有光剛, 志方建仁, 川崎浩司, 菅原大助

    電力土木　(394)　81‐85　2018/03/05

    ISSN： 0386-2895

  30. Geological evidence and sediment transport modelling for the 1946 and 1960 tsunamis in Shinmachi, Hilo, Hawaii

    Catherine Chagué, Daisuke Sugawara, Kazuhisa Goto, James Goff, Walter Dudley, Patricia Gadd

    Sedimentary Geology　364　319-333　2018/02/01

    DOI： 10.1016/j.sedgeo.2017.09.010 　

    ISSN： 0037-0738

  31. CHARACTERISTICS OF TSUNAMI OSCILLATION AROUND TOKYO BAY CAUSED BY NANKAI-TROUGH EARTHQUAKE Peer-reviewed

    OISHI Yusuke, FURUMURA Takashi, IMAMURA Fumihiko, YAMASHITA Kei, SUGAWARA Daisuke

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　74　(2)　I_205-I_210　2018

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.74.I_205 　

    ISSN： 1884-2399

    More details Close

    &nbsp;Characteristics of tsunami oscillation in Tokyo, Sagami and Suruga Bays were investigated regarding the estimated Nankai-Trough megathrust earthquake models. In the cases where there is a large fault slip in the Nankai area, the oscillation of 76 minutes period was commonly excited in the three bays. In the cases with a large slip area in the Tokai or Tonankai area, the 68-minute component was excited only in Suruga and Tokyo Bays. The tsunami tended to be prolonged in the three-bay oscillation mode. The tsunami in the Keihin Canal in Tokyo Bay tended to be strengthened when the oscillation of the entire Tokyo bay include the components that are close to the characteristic period of the canal (30 min). In considering the continuity or amplification of tsunamis of canals in Tokyo bay, it is useful to focus on the macro-scale tsunami oscillation mode among the three neighboring bays.

  32. Paleo-tsunami history along the northern Japan Trench: evidence from Noda Village, northern Sanriku coast, Japan

    Taiga Inoue, Kazuhisa Goto, Yuichi Nishimura, Masashi Watanabe, Yasutaka Iijima, Daisuke Sugawara

    PROGRESS IN EARTH AND PLANETARY SCIENCE　4　2017/12

    DOI： 10.1186/s40645-017-0158-1 　

    ISSN： 2197-4284

  33. 日本各地の多様な津波堆積物

    高清水康博, 後藤和久, 菅原大助, 藤原治, 川上源太郎

    地質学雑誌　123　(10)　III‐IV-IV　2017/10/15

    Publisher: The Geological Society of Japan

    DOI： 10.5575/geosoc.2017.0062 　

    ISSN： 0016-7630

  34. Tsunami sedimentation and deposits due to the 2011 Tohoku earthquake: a review of case studies from Sendai and Hirota Bays

    菅原大助

    地質学雑誌　123　(10)　781‐804-804　2017/10/15

    Publisher:

    DOI： 10.5575/geosoc.2017.0047 　

    ISSN： 0016-7630

  35. Sequential radiocarbon measurement of bulk peat for high-precision dating of tsunami deposits

    Takashi Ishizawa, Kazuhisa Goto, Yusuke Yokoyama, Yosuke Miyairi, Chikako Sawada, Yuichi Nishimura, Daisuke Sugawara

    QUATERNARY GEOCHRONOLOGY　41　202-210　2017/08

    DOI： 10.1016/j.quageo.2017.05.003 　

    ISSN： 1871-1014

    eISSN： 1878-0350

  36. Tsunami deposit modeling of the Nankai-Trough Earthquake

    菅原大助

    環境考古学と富士山　(1)　85‐95,1(3)‐1(4)　2017/03/24

  37. Inverse magnetic fabric in unconsolidated sandy event deposits in Kiritappu Marsh, Hokkaido, Japan

    Shusaku Kon, Norihiro Nakamura, Yuichi Nishimura, Kazuhisa Goto, Daisuke Sugawara

    SEDIMENTARY GEOLOGY　349　112-119　2017/03

    DOI： 10.1016/j.sedgeo.2017.01.003 　

    ISSN： 0037-0738

    eISSN： 1879-0968

  38. 津波堆積物の認定手順

    後藤和久, 菅原大助, 西村裕一, 藤野滋弘, 小松原純子, 澤井祐紀, 高清水康博

    津波工学研究報告　(33)　45‐54-54　2017/01/31

    Publisher:

    ISSN： 0916-7099

  39. 津波砂移動に及ぼす飽和浮遊砂濃度および流砂量算定係数の影響

    有光剛, 松田周吾, 志方建仁, 川崎浩司, 菅原大助

    電力土木　(387)　127‐131-131　2017/01/05

    Publisher:

    ISSN： 0386-2895

  40. EFFECT OF SEDIMENT TRANSPORT ON TSUNAMI HAZARD AND BUILDING DAMAGE – AN INTEGRATED SIMULATION OF TSUNAMI INUDATION, SEDIMENT TRANSPORT AND DRIFTING VESSELS IN KESENNUMA CITY, MIYAGI PREFECTURE DURING THE GREAT EAST JAPAN EARTHQUAKE –

    YAMASHITA Kei, SHIGIHARA Yoshinori, SUGAWARA Daisuke, ARIKAWA Taro, TAKAHASHI Tomoyuki, IMAMURA Fumihiko

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　73　(2)　I_355-I_360　2017

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.73.i_355 　 10.20965/jdr.2021.p1045_references_DOI_7SXqLFNp3AF7qbdA57XejQHBmTV 　 10.20965/jdr.2021.p1030_references_DOI_7SXqLFNp3AF7qbdA57XejQHBmTV 　

    ISSN： 1884-2399

    eISSN： 1883-8944

    More details Close

    An integrated tsunami model consisting of models for simulating tsunami inundation, drifting objects and sediment transport, was newly developed to evaluate the effects of these multiple phenomena. A scenario of complex tsunami damage enlargement in a bay with bottleneck was revealed. The tsunami hazards in Kesennuma City, especially at the inner part of the bay such as Shishiori area, were enlarged by erosion in the bottleneck of the bay. The bathymetric change increased the drift distance of the drifting vessels. In addition, through the tsunami fragility functions based on dataset of actual damaged building and numerical results, it was evaluated that the 200 - 1,800 wooden buildings were washed away owing to sediment transport. Furthermore, it is found that the estimation accuracy of damage scale by the conventional fragility functions was suitable, although the estimated building damage near the sea and inland was under and overestimated, respectively.

  41. EFFECT OF SEDIMENT TRANSPORT ON TSUNAMI HAZARD AND BUILDING DAMAGE - AN INTEGRATED SIMULATION OF TSUNAMI INUDATION, SEDIMENT TRANSPORT AND DRIFTING VESSELS IN KESENNUMA CITY, MIYAGI PREFECTURE DURING THE GREAT EAST JAPAN EARTHQUAKE -

    山下啓, 鴫原良典, 菅原大助, 有川太郎, 高橋智幸, 今村文彦

    土木学会論文集 B2(海岸工学)(Web)　73　(2)　I_355‐I_360(J‐STAGE)-I_360　2017

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.73.I_355 　

    ISSN： 1883-8944

    More details Close

    &nbsp;An integrated tsunami model consisting of models for simulating tsunami inundation, drifting objects and sediment transport, was newly developed to evaluate the effects of these multiple phenomena. A scenario of complex tsunami damage enlargement in a bay with bottleneck was revealed. The tsunami hazards in Kesennuma City, especially at the inner part of the bay such as Shishiori area, were enlarged by erosion in the bottleneck of the bay. The bathymetric change increased the drift distance of the drifting vessels. In addition, through the tsunami fragility functions based on dataset of actual damaged building and numerical results, it was evaluated that the 200 - 1,800 wooden buildings were washed away owing to sediment transport. Furthermore, it is found that the estimation accuracy of damage scale by the conventional fragility functions was suitable, although the estimated building damage near the sea and inland was under and overestimated, respectively.

  42. INFLUENCE OF COMPUTATIONAL PARAMETERS ON ACCURACY OF MOVABLE BED MODEL FOR TSUNAMIS

    有光剛, 松田周吾, 村上嘉謙, 志方建仁, 川崎浩司, 三島豊秋, 清水涼太郎, 菅原大助

    土木学会論文集 B2(海岸工学)(Web)　73　(2)　I_589‐I_594(J‐STAGE)-I_594　2017

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.73.I_589 　

    ISSN： 1883-8944

    More details Close

    &nbsp;Numerical simulations of sediment transport, which was caused by the 2011 Tohoku Tsunami, were conducted in order to investigate the influence of computational parameters on accuracy of movable bed model for tsunamis. Simulation results revealed that the amount of sediment transport differed depending on saturation concentration of suspended sediment. Erosion volume was underestimated in the case that saturation concentration was given as a constant value (1%). On the other hand, erosion caused by the strong return flow was reproduced using saturation concentration of suspended sediment which varies depending on the flow fields. The simulation results also showed that the sediment transport coefficients in the governing equations had relatively less effect on the sediment transport.

  43. EFFECT OF TSUNAMI-INDUCED SEDIMENT TRANSPORT AND OFFSHORE TSUNAMI WAVEFORM ON ENLARGEMENT OF RETURN FLOW

    山下啓, 今村文彦, 岩間俊二, 菅原大助, 高橋智幸

    土木学会論文集 B2(海岸工学)(Web)　73　(2)　I_361‐I_366(J‐STAGE)-I_366　2017

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.73.I_361 　

    ISSN： 1883-8944

    More details Close

    &nbsp;In this study, it was found that through the numerical simulations of sediment transport in case of the 2011 Great East Japan Earthquake and Tsunami in Rikuzentakata City, the water level of the entire city area increased roughly by 1 m through the damage of the seawalls and the water level on the eastern and inner parts also increased remarkably because of the sand dune and riverbed erosion. Moreover, such damages caused the return flow near the coast line to amplify by about twice. On the other hand, using offshore tsunami waveforms, this study proposed a quantitative estimation method of the magnitude of return flow, MRF. Estimation of the MRF was then performed and applied for the Nankai Trough Great Earthquake and Tsunami. The return flow around Tosashimizu and Tokai Area would be equal to or greater than those on Rikuzentakata City or Onagawa Town during the 2011 tsunami. Based on lessons from the 2011 tsunami, since MRF was larger than 0.0003, the typical value in Sanriku Coast, MRF will be important reference for consideration among other countermeasures against future tsunamis.

  44. NEARSHORE EROSION AND OFFSHORE-DIRECTED SEDIMENT TRANSPORT BY TOHOKU-OKI TSUNAMI OFF SOUTHERN PART OF THE SENDAI PLAIN

    吉河秀郎, 後藤和久, 菅原大助, 金松敏也, 阪口秀

    土木学会論文集 B2(海岸工学)(Web)　73　(2)　I_823‐I_828(J‐STAGE)-I_828　2017

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.73.I_823 　

    ISSN： 1883-8944

    More details Close

    &nbsp;Researches on sediment transport and the depositional process are important for understanding of the whole picture of nearshore disaster caused by the 2011 Tohoku-oki tsunami. In this paper, we analyze data from high-resolution seismic surverys, vibracoring, and bathymetric data assimilation, to describe processes of erosion and sedimentation by the tsunami on the shallow seafloor off the southern part of the Sendai plain where serious nearshore erosion occurred during the tsunami.<br>&nbsp;Two well-defined and continuous reflectors (R1 and R2) were identified in the seismic profiles. Based on the geometry and distribution of the reflectors, charateristics of sediment cores, and change in bathymetric profiles, tsunami-generated sediment transport is considered as follows. The transport process was mainly controlled by backwash of the tsunami. The offshore-directed transport of beach sediments (medium to coarse sands) has generated the formation of the R1 erosion surface in water depths deeper than 8 m, followed by the generation of R2 caused by the erosion, transport, and sedimentation of coarse beach sediments (coarse sand to granule) in water depths shallower than ~10m. Both reflectors are not likely to deformed by wave-generated sediment reworking in water depths deeper than 9 m.

  45. Numerical Simulations of Large-Scale Sediment Transport Caused by the 2011 Tohoku Earthquake Tsunami in Hirota Bay, Southern Sanriku Coast

    Kei Yamashita, Daisuke Sugawara, Tomoyuki Takahashi, Fumihiko Imamura, Yuichi Saito, Yoshiyuki Imato, Tadashi Kai, Hitoshi Uehara, Toshihiro Kato, Kazuto Nakata, Ryotaro Saka, Asao Nishikawa

    COASTAL ENGINEERING JOURNAL　58　(4)　2016/12

    DOI： 10.1142/S0578563416400155 　

    ISSN： 0578-5634

    eISSN： 1793-6292

  46. 平成三陸大津波による被災と災害脆弱性~宮城県における人命損失を例に~

    谷口宏充, 菅原大助, 田中倫久

    季刊地理学　68　(3)　202‐203　2016/09/30

    ISSN： 0916-7889

  47. A proposed methodology for deriving tsunami fragility functions for buildings using optimum intensity measures

    Joshua Macabuag, Tiziana Rossetto, Ioanna Ioannou, Anawat Suppasri, Daisuke Sugawara, Bruno Adriano, Fumihiko Imamura, Ian Eames, Shunichi Koshimura

    Natural Hazards　84　(2)　1257-1285　2016/08/11

    Publisher: Springer Nature

    DOI： 10.1007/s11069-016-2485-8 　

    ISSN： 0921-030X

  48. Uncertainty in tsunami sediment transport modeling

    Bruce Jaffe, Kazuhisa Goto, Daisuke Sugawara, Guy Gelfenbaum, Sean Paul La Selle

    Journal of Disaster Research　11　(4)　647-661　2016/08/01

    Publisher: Fuji Technology Press

    DOI： 10.20965/jdr.2016.p0647 　

    ISSN： 1883-8030 1881-2473

    eISSN： 1883-8030

  49. Applications of ITRAX XRF core scanning and PCA in palaeotsunami research Peer-reviewed

    Catherine Chague-Goff, Patricia Gadd, Daisuke Sugawara, James Goff, Kazuhisa Goto, Takeshi Komai

    Japan Geoscience Union Meeting 2016　2016/05/15

  50. Tsunami earthquake can occur elsewhere along the Japan Trench-Historical and geological evidence for the 1677 earthquake and tsunami

    H. Yanagisawa, K. Goto, D. Sugawara, K. Kanamaru, N. Iwamoto, Y. Takamori

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH　121　(5)　3504-3516　2016/05

    DOI： 10.1002/2015JB012617 　

    ISSN： 2169-9313

    eISSN： 2169-9356

  51. Anthropogenic disruption to the seismic driving of beach ridge formation: The Sendai coast, Japan

    James Goff, Jasper Knight, Daisuke Sugawara, James P. Terry

    SCIENCE OF THE TOTAL ENVIRONMENT　544　18-23　2016/02

    DOI： 10.1016/j.scitotenv.2015.11.106 　

    ISSN： 0048-9697

    eISSN： 1879-1026

  52. 津波解析における信頼性の高い市街地浸水モデルに関するスパコンを用いた検討

    大石裕介, 今村文彦, 菅原大助, 古村孝志

    土木学会論文集 B2(海岸工学)(Web)　72　(2)　I_409‐I_414(J‐STAGE)-I_414　2016

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.72.I_409 　

    ISSN： 1883-8944

    More details Close

    &nbsp;A reliable 2-D tsunami inundation model in an urban area is investigated through the 2011 Tohoku tsunami case. Each building is modeled as the uplift of topography with 5-m, 1.67-m, or 55.6-cm resolution on a supercomputer, and it was found that a resolution higher than 1.67 m is necessary to have a well-converged solution. We evaluated the 5-m resolution models that incorporate the effect of buildings as bottom friction or drag force by comparing to the above-mentioned 55.6-cm model. As a result, the drag-force model could provide accurate solution with a constant parameter independently of input wave, while the bottom-friction model required a higher parameter to reproduce a tsunami with larger depth.

  53. A multivariate generalized linear tsunami fragility model for Kesennuma City based on maximum flow depths, velocities and debris impact, with evaluation of predictive accuracy

    I. Charvet, A. Suppasri, H. Kimura, D. Sugawara, F. Imamura

    NATURAL HAZARDS　79　(3)　2073-2099　2015/12

    DOI： 10.1007/s11069-015-1947-8 　

    ISSN： 0921-030X

    eISSN： 1573-0840

  54. Erosion of a paleo-tsunami record by the 2011 Tohoku-oki tsunami along the southern Sendai Plain

    Tetsuya Shinozaki, Kazuhisa Goto, Shigehiro Fujino, Daisuke Sugawara, Takashi Chiba

    MARINE GEOLOGY　369　127-136　2015/11

    DOI： 10.1016/j.margeo.2015.08.009 　

    ISSN： 0025-3227

    eISSN： 1872-6151

  55. Aftereffects of Subduction-Zone Earthquakes: Potential Tsunami Hazards along the Japan Sea Coast

    Koji Minoura, Daisuke Sugawara, Tohru Yamanoi, Tsutomu Yamada

    TOHOKU JOURNAL OF EXPERIMENTAL MEDICINE　237　(2)　91-102　2015/10

    DOI： 10.1620/tjem.237.91 　

    ISSN： 0040-8727

    eISSN： 1349-3329

  56. A study on influential factors on building damage in Kesennuma, Japan from the 2011 great East Japan Tsunami

    Natt Leelawat, Anawat Suppasri, Ingrid Charvet, Takayuki Kimura, Daisuke Sugawara, Fumihiko Imamura

    Engineering Journal　19　(3)　105-115　2015/06/05

    Publisher: Chulalongkorn University 1

    DOI： 10.4186/ej.2015.19.3.105 　

    ISSN： 0125-8281

  57. Marine biomarkers deposited on coastal land by the 2011 Tohoku-oki tsunami

    Tetsuya Shinozaki, Shigehiro Fujino, Minoru Ikehara, Yuki Sawai, Toru Tamura, Kazuhisa Goto, Daisuke Sugawara, Tomoya Abe

    NATURAL HAZARDS　77　(1)　445-460　2015/05

    DOI： 10.1007/s11069-015-1598-9 　

    ISSN： 0921-030X

    eISSN： 1573-0840

  58. 組み合わせ最適化手法を利用した歴史津波の波源推定法―1611年慶長奥州地震の事例―

    今井健太郎, 前田拓人, 飯沼卓史, 蝦名裕一, 菅原大助, 今村文彦, 平川新

    東北地域災害科学研究　51　139-144　2015/03/01

    Publisher:

  59. Near-field tsunami inundation forecast using the parallel TUNAMI-N2 model: Application to the 2011 Tohoku-Oki earthquake combined with source inversions

    Yusuke Oishi, Fumihiko Imamura, Daisuke Sugawara

    GEOPHYSICAL RESEARCH LETTERS　42　(4)　1083-1091　2015/02

    DOI： 10.1002/2014GL062577 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  60. Origin of the reworked deposit in Sarugamori Sand Dunes : investigation of dune formation in Shimokita, northeast Japan

    Kamata Takafumi, Sugawara Daisuke, Minoura Kouji, Nemoto Naoki, Yamada Tsutomu

    Annual Meeting of the Geological Society of Japan　2015　310-310　2015

    Publisher: The Geological Society of Japan

    DOI： 10.14863/geosocabst.2015.0_310 　

  61. Classification of sedimentation by the 2011 Tohoku-oki tsunami in various types of coastal landform

    Abe Tomoya, GOTO Kazuhisa, SUGAWARA Daisuke

    Proceedings of the General Meeting of the Association of Japanese Geographers　2015　100306-100306　2015

    Publisher: The Association of Japanese Geographers

    DOI： 10.14866/ajg.2015s.0_100306 　

  62. NUMERICAL STUDY FOR SEDIMENT TRANSPORT DUE TO TSUNAMI AROUND THE KITAKAMI RIVER MOUTH

    今井健太郎, 菅原大助, 高橋智幸, 岩間俊二, 田中仁

    土木学会論文集 B2(海岸工学)(Web)　71　(2)　I.247-I.252 (J-STAGE)-I_252　2015

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.71.I_247 　

    ISSN： 1883-8944

    More details Close

    A large-scale topographical variation occurred in Kitakami river mouth due to the 2011 Tohoku-oki earthquake tsunami. Land use is often developed in river mouth areas in Japan. As a variation by tsunami can be a factor of impediment to post-disaster recovery and reconstruction, it is important to clarify the process of a topographical change by tsunami in river mouth area.<br> In this research, numerical simulations for tsunami sediment transport were carried out in Kitakami river mouth and the numerical results explain that 1) the erosion of the sandbar near the river mouth was proceeded by tsunami run up, 2) sediment was deposited in rice field of upper stream, and 3) sediment transport close to offing of the river mouth was caused by tsunami back wash.

  63. NUMERICAL SIMULATION OF LARGE-SCALE SEDIMENT TRANSPORT DUE TO THE 2011 TOHOKU EARTHQUAKE TSUNAMI IN RIKUZENTAKATA CITY

    山下啓, 菅原大助, 高橋智幸, 今村文彦, 齋藤友一, 今任嘉幸, 甲斐恭, 上原均, 加藤季広, 中田一人, 坂良太郎, 西川朝雄

    土木学会論文集 B2(海岸工学)(Web)　71　(2)　I.499-I.504 (J-STAGE)-I_504　2015

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.71.I_499 　

    ISSN： 1883-8944

    More details Close

    A numerical modeling of sediment transport was performed to investigate coastal geomorphic change due to the 2011 Tohoku Earthquake tsunami in Rikuzentakata City. The simulation was verified for observed inundation process and height, and measured topographic change and sediment deposition. The role of sediment transport on the modeling of tsunami inundation was also investigated.The numerical results revealed that the most of the sand dune was flushed out by the first wave, especially during the strong return flow. Such strong flow and total erosion of sand dune could also occur elsewhere, in case when a tsunami inundate a plain with moderate distance by shore-normal direction to the coastline.

  64. Extracting Magnitude Information from Tsunami Deposits

    菅原大助

    地学雑誌　123　(6)　797-812　2014/12/25

    Publisher: Tokyo Geographical Society

    DOI： 10.5026/jgeography.123.797 　

    ISSN： 0022-135X

    More details Close

    Magnitude information is an essential measure when assessing risks of large-scale earthquakes and tsunamis. Tsunami deposit characteristics, inundation characteristics, tsunami hydrodynamics, and sedimentation processes are the keys to obtaining magnitude information. Research on the 2011 off the Pacific coast of Tohoku Earthquake and Tsunami covering both terrestrial and subaqueous environments offers a basis for drawing a comprehensive picture of tsunami sedimentology, and increasing our ability to extract magnitude information. Issues related to estimating magnitude information related to a tsunami from its deposits are discussed in the context of some recent and earlier research on the 2011 and 869 Jogan earthquakes and tsunamis, and implications for future research are presented.

  65. Seismic-driving of sand beach ridge formation in northern Honshu, Japan?

    James Goff, Daisuke Sugawara

    MARINE GEOLOGY　358　138-149　2014/12

    DOI： 10.1016/j.margeo.2014.04.005 　

    ISSN： 0025-3227

    eISSN： 1872-6151

  66. Using magnetic fabric to reconstruct the dynamics of tsunami deposition on the Sendai Plain, Japan The 2011 Tohoku-oki tsunami

    Jean-Luc Schneider, Catherine Chague-Goff, Jean-Luc Bouchez, James Goff, Daisuke Sugawara, Kazuhisa Goto, Bruce Jaffe, Bruce Richmond

    MARINE GEOLOGY　358　89-106　2014/12

    DOI： 10.1016/j.margeo.2014.06.010 　

    ISSN： 0025-3227

    eISSN： 1872-6151

  67. Sediment transport due to the 2011 Tohoku-oki tsunami at Sendai: Results from numerical modeling

    Daisuke Sugawara, Tomoyuki Takahashi, Fumihiko Imamura

    MARINE GEOLOGY　358　18-37　2014/12

    DOI： 10.1016/j.margeo.2014.05.005 　

    ISSN： 0025-3227

    eISSN： 1872-6151

  68. The current situation of tsunami geology under new policies for disaster countermeasures in Japan

    Kazuhisa Goto, Shigehiro Fujino, Daisuke Sugawara, Yuichi Nishimura

    EPISODES　37　(4)　258-264　2014/12

    ISSN： 0705-3797

  69. Spatial thickness variability of the 2011 Tohoku-oki tsunami deposits along the coastline of Sendai Bay

    Kazuhisa Goto, Kohei Hashimoto, Daisuke Sugawara, Hideaki Yanagisawa, Tomoya Abe

    MARINE GEOLOGY　358　38-48　2014/12

    DOI： 10.1016/j.margeo.2013.12.015 　

    ISSN： 0025-3227

    eISSN： 1872-6151

  70. Analysis of influential factors on building damage from the 2011 Great East Japan tsunami using multinomial logistic regression Peer-reviewed

    Leelawat, N, Suppasri, A, Charvet, I, Kimura, T, Sugawara, D, Imamura, F

    Thailand–Japan International Academic (TJIA) Conference　2014/11/22

  71. 人工構造物が津波堆積物と逆級化層形成に与える影響

    飯嶋耕崇, 箕浦幸治, 後藤和久, 菅原大助, 阿部朋弥

    堆積学研究　73　(1)　112　2014/06/30

    ISSN： 1342-310X

  72. 2011年東北地方太平洋沖地震津波による仙台湾の極浅海域での海底地形変化

    後藤和久, 有働恵子, 菅原大助, 武田百合子

    堆積学研究　73　(1)　112-113　2014/06/30

    ISSN： 1342-310X

  73. 堆積粒子の巻き上げに伴うエネルギー散逸を考慮した津波土砂移動の計算と検証

    菅原大助, 成瀬元, 後藤和久

    堆積学研究　73　(1)　109　2014/06/30

    ISSN： 1342-310X

  74. 津波堆積物はなぜ薄いのか?―流れの浮遊砂キャパシティ問題再考―

    成瀬元, 後藤和久, 菅原大助

    堆積学研究　73　(1)　108-109　2014/06/30

    ISSN： 1342-310X

  75. 津波堆積物の層厚の支配要因―2パーセント問題―

    後藤和久, 菅原大助, 柳澤英明

    堆積学研究　73　(1)　108　2014/06/30

    ISSN： 1342-310X

  76. 磁気異方性を用いた東北地方太平洋沖地震の津波堆積物の堆積過程

    昆周作, 飯島耕崇, 中村教博, 菅原大助, 後藤和久

    堆積学研究　73　(1)　114　2014/06/30

    ISSN： 1342-310X

  77. 2011年東北沖津波に伴う堆積土砂量の地形別特徴

    阿部朋弥, 後藤和久, 菅原大助

    堆積学研究　73　(1)　108　2014/06/30

    ISSN： 1342-310X

  78. Numerical models of tsunami sediment transport - Current understanding and future directions

    Daisuke Sugawara, Kazuhisa Goto, Bruce E. Jaffe

    MARINE GEOLOGY　352　295-320　2014/06

    DOI： 10.1016/j.margeo.2014.02.007 　

    ISSN： 0025-3227

    eISSN： 1872-6151

  79. Development of a Tsunami Simulator Integrating the Smoothed-Particle Hydrodynamics Method and the Nonlinear Shallow Water Wave Model

    諏訪多聞, 今村文彦, 菅原大助

    土木学会論文集 B2(海岸工学)(Web)　70　(2)　I.16-I.20 (J-STAGE)-I_20　2014

    Publisher: Japan Society of Civil Engineers

    DOI： 10.2208/kaigan.70.I_16 　

    ISSN： 1883-8944

    More details Close

    We develop a tsunami simulator integrating a 3-D fluid simulation technology that runs on large-scale parallel computers using smoothed-particle hydrodynamics (SPH) method, together with a 2-D tsunami propagation simulation technique using a nonlinear shallow water wave model. We use the 2-D simulation to calculate tsunami propagation of scale of about 1000km from epicenter to near shore. The 3-D SPH method can be used to calculate the force that a tsunami can exert on a building, and to simulate flooding patterns in urban area of at most km scale. By applying the processing power of computers to the technologies resulting from this research, we seek to contribute to improved disaster preparedness and disaster mitigation through a better understanding of tsunami's mechanisms.

  80. 谷地形における2011年東北沖津波による堆積物の空間分布

    阿部朋弥, 後藤和久, 菅原大助

    堆積学研究　72　(1)　73　2013/07/12

    ISSN： 1342-310X

  81. The 2011 Tohoku-oki Earthquake Tsunami: Similarities and Differences to the 869 Jogan Tsunami on the Sendai Plain

    Daisuke Sugawara, Fumihiko Imamura, Kazuhisa Goto, Hideaki Matsumoto, Koji Minoura

    PURE AND APPLIED GEOPHYSICS　170　(5)　831-843　2013/05

    DOI： 10.1007/s00024-012-0460-1 　

    ISSN： 0033-4553

    eISSN： 1420-9136

  82. Inundation areas and deposits of the 2011 off the Pacific coast of Tohoku and the 869 Jogan Earthquake Tsunamis

    Sugawara Daisuke, Minoura Koji

    Jour. Geol. Soc. Japan　119　S1-S17　2013

    Publisher: The Geological Society of Japan

    DOI： 10.5575/geosoc.2013.0029 　

    ISSN： 0016-7630

  83. Sedimentary processes associated with sand and boulder deposits formed by the 2011 Tohoku-oki tsunami at Sabusawa Island, Japan

    Kazuhisa Goto, Daisuke Sugawara, Satoko Ikema, Toyohiko Miyagi

    SEDIMENTARY GEOLOGY　282　188-198　2012/12

    DOI： 10.1016/j.sedgeo.2012.03.017 　

    ISSN： 0037-0738

  84. Numerical modeling of the 2011 Tohoku-oki tsunami in the offshore and onshore of Sendai Plain, Japan

    Daisuke Sugawara, Kazuhisa Goto

    SEDIMENTARY GEOLOGY　282　110-123　2012/12

    DOI： 10.1016/j.sedgeo.2012.08.002 　

    ISSN： 0037-0738

  85. Assessing the magnitude of the 869 Jogan tsunami using sedimentary deposits: Prediction and consequence of the 2011 Tohoku-oki tsunami

    Daisuke Sugawara, Kazuhisa Goto, Fumihiko Imamura, Hideaki Matsumoto, Koji Minoura

    SEDIMENTARY GEOLOGY　282　14-26　2012/12

    DOI： 10.1016/j.sedgeo.2012.08.001 　

    ISSN： 0037-0738

    eISSN： 1879-0968

  86. Relationship between the maximum extent of tsunami sand and the inundation limit of the 2011 Tohoku-oki tsunami on the Sendai Plain, Japan

    Tomoya Abe, Kazuhisa Goto, Daisuke Sugawara

    SEDIMENTARY GEOLOGY　282　142-150　2012/12

    DOI： 10.1016/j.sedgeo.2012.05.004 　

    ISSN： 0037-0738

    eISSN： 1879-0968

  87. Coastal changes in the Sendai area from the impact of the 2011 Tohoku-oki tsunami: Interpretations of time series satellite images, helicopter-borne video footage and field observations

    David R. Tappin, Hannah M. Evans, Colm J. Jordan, Bruce Richmond, Daisuke Sugawara, Kazuhisa Goto

    SEDIMENTARY GEOLOGY　282　151-174　2012/12

    DOI： 10.1016/j.sedgeo.2012.09.011 　

    ISSN： 0037-0738

    eISSN： 1879-0968

  88. Flow speed estimated by inverse modeling of sandy tsunami deposits: results from the 11 March 2011 tsunami on the coastal plain near the Sendai Airport, Honshu, Japan

    Bruce E. Jaffe, Kazuhisa Goto, Daisuke Sugawara, Bruce M. Richmond, Shige Fujino, Yuichi Nishimura

    SEDIMENTARY GEOLOGY　282　90-109　2012/12

    DOI： 10.1016/j.sedgeo.2012.09.002 　

    ISSN： 0037-0738

  89. Erosion, deposition and landscape change on the Sendai coastal plain, Japan, resulting from the March 11, 2011 Tohoku-oki tsunami

    Bruce Richmond, Witold Szczucinski, Catherine Chague-Goff, Kazuhisa Goto, Daisuke Sugawara, Rob Witter, David R. Tappin, Bruce Jaffe, Shigehiro Fujino, Yuichi Nishimura, James Goff

    SEDIMENTARY GEOLOGY　282　27-39　2012/12

    DOI： 10.1016/j.sedgeo.2012.08.005 　

    ISSN： 0037-0738

  90. Heavy minerals in the 2011 Tohoku-oki tsunami deposits-insights into sediment sources and hydrodynamics

    Robert Jagodzinski, Beata Sternal, Witold Szczucinski, Catherine Chague-Goff, Daisuke Sugawara

    SEDIMENTARY GEOLOGY　282　57-64　2012/12

    DOI： 10.1016/j.sedgeo.2012.07.015 　

    ISSN： 0037-0738

  91. Environmental impact assessment of the 2011 Tohoku-oki tsunami on the Sendai Plain

    Catherine Chague-Goff, Przemyslaw Niedzielski, Henri K. Y. Wong, Witold Szczucinski, Daisuke Sugawara, James Goff

    SEDIMENTARY GEOLOGY　282　175-187　2012/12

    DOI： 10.1016/j.sedgeo.2012.06.002 　

    ISSN： 0037-0738

  92. Sediment sources and sedimentation processes of 2011 Tohoku-oki tsunami deposits on the Sendai Plain, Japan - Insights from diatoms, nannoliths and grain size distribution

    Witold Szczucinski, Mikolaj Kokocinski, Michal Rzeszewski, Catherine Chague-Goff, Mario Cachao, Kazuhisa Goto, Daisuke Sugawara

    SEDIMENTARY GEOLOGY　282　40-56　2012/12

    DOI： 10.1016/j.sedgeo.2012.07.019 　

    ISSN： 0037-0738

  93. Liquefaction as an important source of the AD 2011 Tohoku-oki tsunami deposits at Sendai Plain, Japan

    Kazuhisa Goto, Daisuke Sugawara, Tomoya Abe, Tsuyoshi Haraguchi, Shigehiro Fujino

    GEOLOGY　40　(10)　887-890　2012/10

    DOI： 10.1130/G33123.1 　

    ISSN： 0091-7613

  94. The Japanese tsunami deposit researches

    後藤和久, 西村裕一, 菅原大助, 藤野滋弘

    地質学雑誌　118　(7)　431-436　2012/07/15

    Publisher: The Geological Society of Japan

    DOI： 10.5575/geosoc.2012.0042 　

    ISSN： 0016-7630

    More details Close

    Geological investigations of tsunami deposits have proliferated since the 2011 Tohoku-oki tsunami in Japan, and are important in developing tsunami disaster prevention plans. However, studies of tsunami deposits in Japan are localized and do not cover the entire coastal zone. In light of these gaps in knowledge, further detailed studies of tsunami deposits should be encouraged. Most of the existing research needs to be reevaluated and integrated before incorporating the results of these studies into disaster prevention plans. Currently, there is no comprehensive summary of previous research on tsunami deposits and this hinders identification of the best sites to focus new investigations of such deposits in Japan. Here, we summarize previously published papers, books, and reports describing tsunami deposits in Japan, and identify sites that need further geological study. Our review of this literature indicates that existing research has mainly been conducted along the Pacific coast, where the risk of large tsunamis is high. A small number of studies have been carried out in parts of Hokkaido, north of Tohoku, the east coast of Kanto, and Kyushu. Very few studies of tsunami deposits have been carried out along the Japan Sea coast.

  95. Impact of the 2011 Tohoku earthquake and tsunami on beach morphology along the northern sendai coast

    Keiko Udo, Daisuke Sugawara, Hitoshi Tanaka, Kentaro Imai, Akira Mano

    Coastal Engineering Journal　54　(1)　2012/03

    DOI： 10.1142/S057856341250009X 　

    ISSN： 0578-5634

    eISSN： 1793-6292

  96. NATIONWIDE POST EVENT SURVEY AND ANALYSIS OF THE 2011 TOHOKU EARTHQUAKE TSUNAMI

    Nobuhito Mori, Tomoyuki Takahashi

    COASTAL ENGINEERING JOURNAL　54　(1)　2012/03

    DOI： 10.1142/S0578563412500015 　

    ISSN： 0578-5634

  97. Relationship between the tsunami inundation distance and the maximum extent of the sandy deposit by the 2011 Tohoku-oki tsunami and the 869 Jōgan tsunami in Sendai Plain

    Abe Tomoya, Goto Kazuhisa, Sugawara Daisuke

    Proceedings of the General Meeting of the Association of Japanese Geographers　2012　100145-100145　2012

    Publisher: The Association of Japanese Geographers

    DOI： 10.14866/ajg.2012s.0_100145 　

    More details Close

    &nbsp;&nbsp;

  98. Field Survey of Tsunami trace heights and Characteristics of Tsunami Propagation along the coast of Aomori Prefecture on the 2011 off the Pacific coast of Tohoku Earthquake

    今井健太郎, 原田健治, 菅原大助

    土木学会論文集 B2(海岸工学)(Web)　68　(2)　I.1376-I.1380 (J-STAGE)　2012

    DOI： 10.2208/kaigan.68.I_1376 　

    ISSN： 1883-8944

  99. Field measurements and numerical modeling for the run-up heights and inundation distances of the 2011 Tohoku-oki tsunami at Sendai Plain, Japan

    Kazuhisa Goto, Koji Fujima, Daisuke Sugawara, Shigehiro Fujino, Kentaro Imai, Ryouta Tsudaka, Tomoya Abe, Tsuyoshi Haraguchi

    EARTH PLANETS AND SPACE　64　(12)　1247-1257　2012

    DOI： 10.5047/eps.2012.02.007 　

    ISSN： 1343-8832

  100. New insights of tsunami hazard from the 2011 Tohoku-oki event

    Kazuhisa Goto, Catherine Chague-Goff, Shigehiro Fujino, James Goff, Bruce Jaffe, Yuichi Nishimura, Bruce Richmond, Daisuke Sugawara, Witold Szczucinski, David R. Tappin, Robert C. Witter, Eko Yulianto

    MARINE GEOLOGY　290　(1-4)　46-50　2011/12

    DOI： 10.1016/j.margeo.2011.10.004 　

    ISSN： 0025-3227

  101. 宮城県南部沿岸域における津波被害の特徴

    今井健太郎, 今村文彦, 越村俊一, 菅原大助, サッパシー アナワット, 佐藤翔輔

    津波工学研究報告　28　(28)　141-145　2011/03/30

    Publisher:

    ISSN： 0916-7099

  102. 仙台平野を中心とする津波被害実態と堆積物調査報告

    後藤和久, 西村裕一, 菅原大助, 阿部朋弥, 中村有吾, 藤野滋弘, 原口強

    津波工学研究報告　28　(28)　135-140　2011/03/30

    Publisher:

    ISSN： 0916-7099

  103. Characteristics of Tsunami Damage on The 2011 off Tohoku Oki Earthquake Tsunami along the South Coast of Miyagi prefecture, Survey report about the Off Pacific earthquake and tsunami in Tohoku region

    Imai, K, Imamura, F, Koshimura, S, Sugawara, D, Suppasri, A, Sato, S

    Tsunami Engineering Technical Report　28　141-145　2011/03

  104. Reconstruction of the AD 869 Jogan earthquake induced tsunami by using the geological data

    菅原大助, 今村文彦, 松本秀明, 後藤和久, 箕浦幸治

    自然災害科学　29　(4)　501-516　2011/02/28

    ISSN： 0286-6021

  105. Distribution of boulders at Miyara Bay of Ishigaki Island, Japan: A flow characteristic indicator of tsunami and storm waves

    Kazuhisa Goto, Tetsuya Shinozaki, Koji Minoura, Kiyohiro Okada, Daisuke Sugawara, Fumihiko Imamura

    ISLAND ARC　19　(3)　412-426　2010/09

    DOI： 10.1111/j.1440-1738.2010.00721.x 　

    ISSN： 1038-4871

  106. 過去の津波像の定量的復元:貞観津波の痕跡調査と古地形の推定について

    菅原大助, 今村文彦, 松本秀明, 後藤和久, 箕浦幸治

    津波工学研究報告　(27)　103-132　2010/03/30

    Publisher:

    ISSN： 0916-7099

  107. Application of geological data to the numerical reconstruction of the AD 869 Jogan tsunami

    Sugawara Daisuke, Imamura Fumihiko, Matsumoto Hideaki, Goto Kazuhisa, Minoura Koji

    Annual Meeting of the Geological Society of Japan　2010　546-546　2010

    Publisher: The Geological Society of Japan

    DOI： 10.14863/geosocabst.2010.0.546.0 　

    ISSN： 1348-3935

  108. Studies on sediment liquefaction by underwater shock waves on the hypothesis of meteorite impact

    Minoura, K, Sugawara, D, Hosseini, S. H. R, Takayama, K

    Sci. Rep. Tohoku University, 2nd Series (Geology)　64　(1)　1-10　2010

  109. Foraminiferal evidence of submarine sediment transport and deposition by backwash during the 2004 Indian Ocean tsunami

    Daisuke Sugawara, Koji Minoura, Naoki Nemoto, Shinji Tsukawaki, Kazuhisa Goto, Fumihiko Imamura

    ISLAND ARC　18　(3)　513-525　2009/09

    DOI： 10.1111/j.1440-1738.2009.00677.x 　

    ISSN： 1038-4871

    eISSN： 1440-1738

  110. Natural hazards inflicted by sea water lacustrine water mixing

    MINOURA KOJI, SUGAWARA DAISUKE

    Annual Meeting of the Geological Society of Japan　2008　7-7　2008

    Publisher: The Geological Society of Japan

    DOI： 10.14863/geosocabst.2008.0.7.0 　

    ISSN： 1348-3935

  111. Distribution, origin and transport process of boulders deposited by the 2004 Indian Ocean tsunami at Pakarang Cape, Thailand

    Kazuhisa Goto, Suchana A. Chavanich, Fumihiko Imamura, Passkorn Kunthasap, Takafumi Matsui, Koji Minoura, Daisuke Sugawara, Hideaki Yanagisawa

    SEDIMENTARY GEOLOGY　202　(4)　821-837　2007/12

    DOI： 10.1016/j.sedgeo.2007.09.004 　

    ISSN： 0037-0738

    eISSN： 1879-0968

  112. Marmara海における走向移動断層運動と海底地滑り:海岸後退の1要因

    菅原大助, 箕浦幸治, 今村文彦, 高橋智幸

    津波工学研究報告　24　(24)　91-99　2007/03/30

    Publisher:

    ISSN： 0916-7099

  113. 堆積物から紐解く自然災害 2004年インド洋大津波によって運搬された′′津波石′′の起源

    後藤和久, CHAVANICH Suchana, 今村文彦, KUNTHASAP Passkorn, 松井孝典, 箕浦幸治, 菅原大助, 柳澤英明

    月刊地球　28　(8)　553-557　2006/08/01

    Publisher:

    ISSN： 0387-3498

  114. 2004年インド洋大津波によって形成された津波堆積物の特徴:タイ・バンサックビーチの研究例

    後藤和久, 今村文彦, KUNTHASAP P, 松井孝典, 箕浦幸治, 菅原大助

    津波工学研究報告　23　(23)　51-57　2006/03/30

    Publisher:

    ISSN： 0916-7099

  115. A huge sand dome formed by the 1854 earthquake tsunami in Suruga bay, central Japan

    Daisuke Sugawara, Koji Minoura, Fumihiko Imamura, Tomoyuki Takahashi, Nobuo Shuto

    ISET Journal of Earthquake Technology　42　147-158　2005/12/01

    ISSN： 0972-0405

  116. A tsunami generated by a possible submarine slide: Evidence for slope failure triggered by the North Anatolian Fault movement

    K Minoura, F Imamura, U Kuran, T Nakamura, GA Papadopoulos, D Sugawara, T Takahashi, AC Yalciner

    NATURAL HAZARDS　36　(3)　297-306　2005/11

    DOI： 10.1007/s11069-005-0319-1 　

    ISSN： 0921-030X

  117. Hydraulic experiments regarding tsunami sedimentation

    菅原大助, 箕浦幸治, 今村文彦, 広田剛志, 菅原正宏, 大窪滋生

    地質学論集　(58)　153-162　2004/12/20

    Publisher:

    ISSN： 0385-8545

  118. 津波により一様斜面上を移動する土砂および津波石に関する水理実験

    菅原正宏, 大窪慈生, 菅原大助, 箕浦幸治, 今村文彦

    海岸工学論文集　50　(1)　266-270　2003/10/10

    Publisher:

    DOI： 10.2208/proce1989.50.266 　

    ISSN： 0916-7897

  119. 津波研究の最前線 II 過去の津波の事例研究 3章 津波痕跡遺物による物証研究 西暦869年貞観津波による堆積物に関する現地調査

    菅原大助, 箕浦幸治, 今村文彦

    月刊海洋　110-117　2002/02/01

    ISSN： 0916-2011

  120. The 869 Jogan tsunami deposit and recurrence interval of large-scale tsunami on the Pacific coast of northeast Japan

    Minoura K, Imamura F, Sugawara D, Kono Y, Iwashita T

    Nat. Dis. Sci.　23　83-88　2002

  121. 貞観津波堆積物（西暦869年）に関する現地調査．

    菅原大助, 箕浦幸治, 今村文彦

    月刊海洋　28　110-117　2002

  122. 西暦869年貞観津波による堆積作用とその数値復元

    菅原大助, 箕浦幸治, 今村文彦

    津波工学研究報告　18　(18)　1-10　2001/03

    Publisher:

    ISSN： 0916-7099

Show all ︎Show first 5

Misc. 25

  1. Lessons from the 2011 Tohoku-oki tsunami Peer-reviewed

    D. Sugawara

    Tsunamiites　155-181　2021

    Publisher: Elsevier

    DOI： 10.1016/b978-0-12-823939-1.00010-0 　

  2. Trigger mechanisms and hydrodynamics of tsunamis

    Daisuke Sugawara

    Geological Records of Tsunamis and Other Extreme Waves　47-73　2020

    Publisher: Elsevier

    DOI： 10.1016/b978-0-12-815686-5.00004-3 　

  3. 国後島における津波堆積物調査:2015-2018年の成果

    西村裕一, 高清水康博, 菅原大助, 圓谷昂史, 千葉崇, 中西諒, SHISHKIN Alexander, GORBUNOV Alexey, KAISTRENKO Victor, 高橋明日香, 村松弘規, 川添安之, 高松直史

    日本地球惑星科学連合大会予稿集(Web)　2019　2019

  4. CHARACTERISTICS OF TSUNAMI OSCILLATION AROUND TOKYO BAY CAUSED BY NANKAI-TROUGH EARTHQUAKE

    大石裕介, 古村孝志, 今村文彦, 山下啓, 菅原大助

    土木学会論文集 B2(海岸工学)(Web)　74　(2)　2018

    ISSN： 1883-8944

  5. Restoration measures after the 2011 Tohoku-oki tsunami and their impact on tsunami research

    Catherine Chagué-Goff, Kazuhisa Goto, Daisuke Sugawara, Yuichi Nishimura, Takeshi Komai

    Advances in Natural and Technological Hazards Research　47　229-247　2018

    Publisher: Springer Netherlands

    DOI： 10.1007/978-3-319-58691-5_14 　

    ISSN： 2213-6959 1878-9897

    eISSN： 2213-6959

  6. Evolution of numerical modeling as a tool for predicting tsunami-induced morphological changes in coastal areas: A review since the 2011 Tohoku Earthquake

    Daisuke Sugawara

    Advances in Natural and Technological Hazards Research　47　451-467　2018

    Publisher: Springer Netherlands

    DOI： 10.1007/978-3-319-58691-5_26 　

    ISSN： 2213-6959 1878-9897

  7. 湾水振動が励起された湾内の運河における津波挙動

    大石裕介, 古村孝志, 今村文彦, 山下啓, 菅原大助

    日本地震学会秋季大会講演予稿集(CD-ROM)　2017　2017

  8. The geological record of tsunamis in the anthropocene

    Daisuke Sugawara

    Multidisciplinary Studies of the Environment and Civilization: Japanese Perspectives　43-56　2017/01/01

    Publisher: Taylor and Francis

    DOI： 10.4324/9781315190273 　

  9. Resolution dependency of tsunami simulation by an SPH method

    21　4p　2016/05

    Publisher: 日本計算工学会

  10. 南海トラフ巨大地震による津波の東京湾と相模湾における波形類似性

    大石裕介, 古村孝志, 今村文彦, 山下啓, 菅原大助

    日本地震学会秋季大会講演予稿集　2016　2016

  11. 地形変動

    菅原大助, 後藤和久, 有働恵子

    土木学会東日本大震災報告書　2016

  12. 沿岸津波波形の高精度評価に基づく津波浸水の高解像度再現計算

    大石裕介, 今村文彦, 菅原大助, 古村孝志

    日本地震学会秋季大会講演予稿集　2015　2015

  13. リアルタイム津波浸水予測精度向上に向けた波源逆解析手法の検討(2)

    大石裕介, 今村文彦, 菅原大助, 古村孝志

    日本地球惑星科学連合大会予稿集(Web)　2015　2015

  14. A method to determine the level 1 and level 2 tsunami inundation areas for reconstruction in Eastern Japan and possible application in pre-disaster areas

    Abdul Muhari, Kentaro Imai, Daisuke Sugawara, Fumihiko Imamura

    Advances in Natural and Technological Hazards Research　44　133-155　2015

    Publisher: Springer Netherlands

    DOI： 10.1007/978-3-319-10202-3_10 　

    ISSN： 2213-6959 1878-9897

  15. リアルタイム津波浸水予測精度向上に向けた波源逆解析手法の検討

    大石裕介, 今村文彦, 菅原大助

    日本地震学会秋季大会講演予稿集　2014　2014

  16. Impact of tsunami inundation on soil salinisation: Up to one year after the 2011 Tohoku-oki tsunami

    Catherine Chagué-Goff, Henri K. Y. Wong, Daisuke Sugawara, James Goff, Yuichi Nishimura, Jennifer Beer, Witold Szczuciński, Kazuhisa Goto

    Advances in Natural and Technological Hazards Research　35　193-214　2014

    Publisher: Springer Netherlands

    DOI： 10.1007/978-94-007-7269-4_10 　

    ISSN： 2213-6959 1878-9897

    eISSN： 2213-6959

  17. Ecological status of sandy beaches after tsunami events: Insights from meiofauna investigations after the 2011 Tohoku-oki tsunami, Sendai Bay, Japan

    Katarzyna Grzelak, Witold Szczuciński, Lech Kotwicki, Daisuke Sugawara

    Advances in Natural and Technological Hazards Research　35　177-191　2014

    Publisher: Springer Netherlands

    DOI： 10.1007/978-94-007-7269-4_9 　

    ISSN： 2213-6959 1878-9897

  18. Numerical simulation of coastal sediment transport by the 2011 Tohoku-oki earthquake Tsunami

    Daisuke Sugawara, Tomoyuki Takahashi

    Advances in Natural and Technological Hazards Research　35　99-112　2014

    Publisher: Springer Netherlands

    DOI： 10.1007/978-94-007-7269-4_4 　

    ISSN： 2213-6959 1878-9897

  19. Leap-frog差分法による津波浸水シミュレーションの「京」コンピュータ上での実装

    大石裕介, 今村文彦, 菅原大助

    日本地震学会秋季大会講演予稿集　2013　2013

  20. 西暦869年貞観津波による堆積物に関する現地調査 (総特集 津波研究(2))

    菅原 大助, 箕浦 幸治, 今村 文彦

    月刊地球　33　(3)　132-139　2011/03

    Publisher: 海洋出版

    ISSN： 0387-3498

  21. S-7 Natural hazards inflicted by sea water-lacustrine water mixing

    Minoura K., Sugawara D.

    115　5-5　2008/09/15

    Publisher: The Geological Society of Japan

  22. Tsunamis and Tsunami Sedimentology

    D. Sugawara, K. Minoura, F. Imamura

    Tsunamiites - Features and Implications　9-49　2008

    Publisher: Elsevier Inc.

    DOI： 10.1016/B978-0-444-51552-0.00003-5 　

  23. Distribution and Significance of the 2004 Indian Ocean Tsunami Deposits. Initial Results from Thailand and Sri Lanka

    K. Goto, F. Imamura, N. Keerthi, P. Kunthasap, T. Matsui, K. Minoura, A. Ruangrassamee, D. Sugawara, S. Supharatid

    Tsunamiites - Features and Implications　105-122　2008

    Publisher: Elsevier Inc.

    DOI： 10.1016/B978-0-444-51552-0.00007-2 　

  24. O-186 Studies on liquefaction of sediments by underwater shock waves based on meteorite impact hypothesis

    Minoura K., Sugawara D., Hosseini S. H. R., Takayama K.

    114　154-154　2007/09/01

    Publisher: The Geological Society of Japan

  25. The hydraulic test of sediment and tunami stone moving on a uniform slope by tsunami.

    菅原正宏, 大窪慈生, 菅原大助, 箕浦幸治, 今村文彦

    堆積学的手法による地滑り津波の発生機構の解明 平成12-14年度 No.12574016　34-38　2003

Show all ︎Show first 5

Presentations 62

  1. IODP‐ICDP第364次研究航海によるチチュルブ・クレーター掘削の成果とクレーター内部堆積物の再堆積過程

    後藤和久, 石澤尭史, 菅原大助, MORGAN Joanna V, GULICK Sean P, S

    日本堆積学会大会プログラム・講演要旨　2018/03/25

  2. 仙台湾南部における3.11津波による沖向き土砂移動

    吉河秀郎, 佐藤晃, 後藤和久, 菅原大助, 金松敏也, 阪口秀

    日本堆積学会大会プログラム・講演要旨　2018/03/25

  3. 千島海溝沿いの津波と国後島太平洋沿岸のイベント砂層に関する検討

    菅原大助, 西村裕一, 高清水康博, 圓谷昂史, 千葉崇, 千葉崇

    日本地球惑星科学連合大会予稿集(Web)　2018

  4. 千葉県銚子市の過去3000年間の古津波履歴

    檜垣北斗, 後藤和久, 柳澤英明, 菅原大助, 石澤尭史

    日本地球惑星科学連合大会予稿集(Web)　2018

  5. 国後島における津波堆積物調査:2015‐2017年の成果と課題

    西村裕一, 高清水康博, 菅原大助, 圓谷昂史, 千葉崇, 千葉崇, SHISHIKIN Alexander, GORBUNOV Alexsey, KAISTRENKO Victor, 高橋明日香, 村松弘規, 川添安之

    日本地球惑星科学連合大会予稿集(Web)　2018

  6. 三保の松原の景観形成に関する人的影響

    山田和芳, 菅原大助

    日本地球惑星科学連合大会予稿集(Web)　2018

  7. 沿岸域の詳細地形データ整備は津波防災における焦眉の課題

    原口強, 菅原大助

    日本地球惑星科学連合大会予稿集(Web)　2018

  8. 湾水振動が励起された湾内の運河における津波挙動

    大石裕介, 古村孝志, 今村文彦, 山下啓, 菅原大助

    日本地震学会秋季大会講演予稿集(CD-ROM)　2017/10/06

  9. 歴史時代の津波氾濫解析における地形復元の影響―岩手県宮古市における検討例―

    菅原大助, 蝦名裕一, 岡田真介, 今井健太郎

    日本地震学会秋季大会講演予稿集(CD-ROM)　2017/10/06

  10. 津波堆積物の数値モデリングと地震・津波像の復元

    菅原大助

    日本第四紀学会講演要旨集　2017/08/26

  11. 八丈島における巨礫群の崖上への打ち上げ過程の数値的検討

    渡部真史, 後藤和久, 今村文彦, 菅原大助, 中村教博, 外崎貴之

    日本堆積学会大会プログラム・講演要旨　2017/03/10

  12. ロシア沿海州における1993年北海道南西沖地震による津波堆積物の面的分布

    西村裕一, RAZJIGAEVA Nadezhda G, GANZEY Larisa A, 菅原大助, 高清水康博, LEBEDEV Ilya, LEBEDEV Ilya, BORISOV Ruslan, BORISOV Ruslan

    日本地球惑星科学連合大会予稿集(Web)　2017

  13. ロシア沿海州における津波の挙動と堆積物形成の数値解析

    菅原大助, 西村裕一, 高清水康博, RAZJIGAEVA Nadezhda G, GANZEY Larisa A, LEBEDEV Ilya, LEBEDEV Ilya, BORISOV Ruslan, BORISOV Ruslan

    日本地球惑星科学連合大会予稿集(Web)　2017

  14. 青森県八戸市における古津波履歴

    篠原敬博, 後藤和久, 菅原大助

    日本地球惑星科学連合大会予稿集(Web)　2017

  15. 数値計算による海域での津波土砂移動過程の予察的検討

    佐藤晃, 菅原大助, 久松明史, 後藤和久

    日本地球惑星科学連合大会予稿集(Web)　2017

  16. 津波統合モデルによる津波複合被害の再現シミュレーション―東日本大震災の宮城県気仙沼市で起こった津波に伴う土砂移動と船舶漂流―

    山下啓, 鴫原良典, 菅原大助, 有川太郎, 高橋智幸, 今村文彦

    海洋工学シンポジウム講演要旨集(CD-ROM)　2017

  17. 南海トラフ巨大地震による津波の東京湾と相模湾における波形類似性

    大石裕介, 古村孝志, 今村文彦, 山下啓, 菅原大助

    日本地震学会秋季大会講演予稿集　2016/09/16

  18. 2011年東北地方太平洋沖地震津波による仙台湾浅海域での堆積・侵食過程

    佐藤晃, 後藤和久, 菅原大助, 有働恵子

    日本地質学会学術大会講演要旨　2016/09/05

  19. SPH法による津波シミュレーションの解像度依存性

    諏訪多聞, 風間正喜, 今村文彦, 菅原大助, 菅原大助, 山下啓

    計算工学講演会論文集(CD-ROM)　2016/05/31

  20. 帯磁率が低い古津波堆積物における磁気異方性的特徴:北海道霧多布湿原の例

    昆周作, 中村教博, 西村裕一, 後藤和久, 菅原大助, 山田昌樹

    日本堆積学会大会プログラム・講演要旨　2016/03/04

  21. 2011年東北沖津波による古津波堆積物の侵食

    篠崎鉄哉, 後藤和久, 藤野滋弘, 菅原大助, 千葉崇

    日本堆積学会大会プログラム・講演要旨　2016/03/04

  22. 津波氾濫・土砂移動・漂流物移動の平面2次元統合モデルによる津波複合被害の再現計算―東日本大震災の宮城県気仙沼市への適用―

    山下啓, 鴫原良典, 菅原大助, 有川太郎, 高橋智幸, 今村文彦

    日本自然災害学会学術講演会講演概要集　2016

  23. 古津波堆積物と古地形の関係―GPRによる予察的検討―

    武田開, 後藤和久, 松本秀明, 菅原大助, GOFF James

    日本地球惑星科学連合大会予稿集(Web)　2016

  24. 数値解析を用いた津波堆積物研究の現状と今後

    菅原大助, JAFFE Bruce, GELFENBAUM Guy, LA SELLE Seanpaul, 後藤和久

    日本地球惑星科学連合大会予稿集(Web)　2016

  25. 岩手県野田村における津波堆積物調査

    井上大雅, 後藤和久, 西村裕一, 渡部真史, 飯嶋耕崇, 菅原大助

    日本地球惑星科学連合大会予稿集(Web)　2016

  26. 沿岸津波波形の高精度評価に基づく津波浸水の高解像度再現計算

    大石裕介, 今村文彦, 菅原大助, 古村孝志

    日本地震学会秋季大会講演予稿集　2015/10/05

  27. 猿ケ森砂丘に挟在する再堆積層の成因:下北半島後期完新世砂丘の起源の考察

    鎌田隆史, 菅原大助, 箕浦幸治, 根本直樹, 山田努

    日本地質学会学術大会講演要旨　2015/09/10

  28. 多様な沿岸地形での2011年東北地方太平洋沖地震津波による堆積作用の類型化

    阿部朋弥, 後藤和久, 菅原大助

    日本地理学会発表要旨集　2015/03/10

  29. 津波堆積物研究の現状と日本堆積学会の取り組み

    後藤和久, 小松原純子, 菅原大助, 高清水康博, 高野修, 藤野滋弘

    日本地球惑星科学連合大会予稿集(Web)　2015

  30. ベイズ理論に基づく津波堆積物の高精度放射性炭素年代決定の試み

    石澤尭史, 後藤和久, 横山祐典, 宮入陽介, 沢田近子, 西村裕一, 菅原大助

    日本地球惑星科学連合大会予稿集(Web)　2015

  31. 和歌山県すさみ町における完新世の古環境変遷と古津波堆積物

    千葉崇, 後藤和久, 藤野滋弘, 横山祐典, 宮入陽介, 沢田近子, 石澤尭史, 西村裕一, 菅原大助, GOFF James

    日本地球惑星科学連合大会予稿集(Web)　2015

  32. 津波堆積物の高精度放射性炭素年代測定

    宮入陽介, 横山祐典, 沢田近子, 石澤尭史, 西村裕一, 菅原大助, 川又隆央, 後藤和久

    日本地球惑星科学連合大会予稿集(Web)　2015

  33. 避難範囲に及ぼす道路平面構造の影響の分析手法について

    木村裕行, 菅原大助, 今村文彦, 渡邉真悟

    日本地球惑星科学連合大会予稿集(Web)　2015

  34. 津波に伴う浸食・堆積・地形変化プロセスの解明:現状と課題

    菅原大助, 成瀬元

    日本地球惑星科学連合大会予稿集(Web)　2015

  35. リアルタイム津波浸水予測精度向上に向けた波源逆解析手法の検討(2)

    大石裕介, 今村文彦, 菅原大助, 古村孝志

    日本地球惑星科学連合大会予稿集(Web)　2015

  36. 宮城県岩沼市における東北地方太平洋沖地震津波の海岸林による津波減衰効果に関する数値的検討

    林晃大, 山下啓, 菅原大助, 今村文彦

    日本自然災害学会学術講演会講演概要集　2015

  37. 大分県龍神池の津波堆積物形成過程に関する数値的検討

    今井健太郎, 菅原大助, 高橋智幸

    日本自然災害学会学術講演会講演概要集　2015

  38. 自然災害からの避難行動を考える―宮城県東松島市における3.11津波による人命損失を例に―

    谷口宏充, 菅原大助, 田中倫久

    日本火山学会講演予稿集　2015

  39. 1833年天保出羽沖地震津波の波源再評価

    今井健太郎, 都司嘉宣, 菅原大助

    日本地震学会秋季大会講演予稿集　2014/11/01

  40. リアルタイム津波浸水予測精度向上に向けた波源逆解析手法の検討

    大石裕介, 今村文彦, 菅原大助

    日本地震学会秋季大会講演予稿集　2014/11/01

  41. 海溝型地震の予後:津波痕跡による変動の評価

    箕浦幸治, 菅原大助, 山野井徹, 山田努

    日本地質学会学術大会講演要旨　2014/09/10

  42. 乱流運動エネルギー保存と干渉沈降を考慮した浮遊砂輸送キャパシティ

    成瀬元, 菅原大助, 後藤和久

    日本地質学会学術大会講演要旨　2014/09/10

  43. 津波堆積物を用いた古津波規模の推定にむけて

    後藤和久, 菅原大助

    日本第四紀学会講演要旨集　2014/09/05

  44. 堆積粒子の巻き上げに伴うエネルギー散逸を考慮した津波土砂移動の計算と検証

    菅原大助, 成瀬元, 後藤和久

    日本堆積学会大会プログラム・講演要旨　2014

  45. 2011年東北沖津波に伴う堆積土砂量の地形別特徴

    阿部朋弥, 後藤和久, 菅原大助

    日本堆積学会大会プログラム・講演要旨　2014

  46. 宮城県女川湾における東北地方太平洋沖地震津波の挙動の数値解析

    山下啓, 菅原大助, 今村文彦

    日本自然災害学会学術講演会講演概要集　2014

  47. 人工構造物が津波堆積物と逆級化層形成に与える影響

    飯嶋耕崇, 箕浦幸治, 後藤和久, 菅原大助, 阿部朋弥

    日本堆積学会大会プログラム・講演要旨　2014

  48. 磁気異方性を用いた東北地方太平洋沖地震の津波堆積物の堆積過程

    昆周作, 飯島耕崇, 中村教博, 菅原大助, 後藤和久

    日本堆積学会大会プログラム・講演要旨　2014

  49. 2011年東北地方太平洋沖地震津波による仙台湾の極浅海域での海底地形変化

    後藤和久, 有働恵子, 菅原大助, 武田百合子

    日本堆積学会大会プログラム・講演要旨　2014

  50. 津波堆積物はなぜ薄いのか?―流れの浮遊砂キャパシティ問題再考―

    成瀬元, 後藤和久, 菅原大助

    日本堆積学会大会プログラム・講演要旨　2014

  51. 津波堆積物の層厚の支配要因―2パーセント問題―

    後藤和久, 菅原大助, 柳澤英明

    日本堆積学会大会プログラム・講演要旨　2014

  52. 2011東北津波を巨大化させた沿岸沈水地形

    原口強, 菅原大助

    日本応用地質学会研究発表会講演論文集　2013/10/24

  53. Leap‐frog差分法による津波浸水シミュレーションの「京」コンピュータ上での実装

    大石裕介, 今村文彦, 菅原大助

    日本地震学会秋季大会講演予稿集　2013/10/01

  54. 南三陸海岸ジオパーク構想と被災遺構―ビジターズ産業に基づく地域の復興を目指して―

    谷口宏充, 宮原育子, 田代祐徳, 田中倫久, 菅原大助

    日本火山学会講演予稿集　2013

  55. 谷地形における2011年東北沖津波による堆積物の空間分布

    阿部朋弥, 後藤和久, 菅原大助

    日本堆積学会大会プログラム・講演要旨　2013

  56. 2011年東北地方太平洋沖地震津波と869年貞観津波の仙台平野での津波遡上距離と砂層分布限界の関係

    阿部朋弥, 後藤和久, 菅原大助

    日本地理学会発表要旨集　2012/03/10

  57. 津波痕跡と史料から解釈した1611年慶長地震

    今井健太郎, 菅原大助, 今村文彦

    日本自然災害学会学術講演会講演概要集　2012

  58. 仙台平野における津波遡上距離と砂層分布限界の関係

    阿部朋弥, 後藤和久, 菅原大助

    日本堆積学会大会プログラム・講演要旨　2011

  59. 地質学的データに基づく津波像の数値復元:西暦869年貞観津波の例

    菅原大助, 今村文彦, 松本秀明, 後藤和久, 箕浦幸治

    日本地質学会学術大会講演要旨　2010/09/15

  60. 海水‐陸水大規模混合の災害科学

    箕浦幸治, 菅原大助

    日本地質学会学術大会講演要旨　2008/09/15

  61. 隕石衝突説に基づく水中衝撃波の古海洋学的研究

    箕浦幸治, 菅原大助, HOSSEINI S.H.R, 高山和喜

    日本地質学会学術大会講演要旨　2007/09/01

  62. 津波石分布に基づく2004年インド洋大津波の流動特性

    後藤和久, CHAVANICH S. A, 今村文彦, KUNTHASAP P, 松井孝典, 箕浦幸治, 菅原大助, 柳澤英明

    日本堆積学会例会プログラム・講演要旨　2007/03/27

Show all Show first 5

Research Projects 12

  1. Integrated analyses of paleotsunami history along the Japan Trench

    Goto Kazuhisa

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    2017/04/01 - 2021/03/31

    More details Close

    The objective of this study is to clarify the paleotsunami history along the Pacific coast of East Japan based on the efficient finding of survey sites using Ground Penetrating Radar and numerical modeling. Field survey was performed along the coastal area from Aomori to Chiba Prefectures and we found multiple candidate tsunami deposits at several sites. Based on detail sedimentological, paleontological, and geochemical analyses together with radiocarbon dating, we revealed paleotsunami history and size of each event. Among them, we investigated the 3000 years paleotsunami history at Choshi City of Chiba Prefecture and revealed that there were three large tsunami events at this site. The timing of these events were relatively close to those occurred at central Japan Trench.

  2. Reconstruction of paleoseismological events based on the seismic driving model

    Sugawara Daisuke

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    2017/04/01 - 2021/03/31

    More details Close

    In this study, relationship between formation and development of coastal topography and paleo-earthquake and tsunami were examined. In the Shimizu Plain, Shizuoka City, a large-scale coseismic uplift that took place around ca. 400 AD was identified based on the analysis of data from ground-penetrating radar (GPR) and sedimentary deposits. In Makinohara City, a possible tsunami deposit dated at early 4th to 5th century was detected. This coincides with the ca. 400 AD uplift in the Shimizu Plain. An increase in sediment supply to the coast 150 years after the tsunami was inferred from the GPR and sediment data. In Yaidzu City, a prehistoric and three historic tsunami deposits were found from the GPR and sediment data. A large-scale landslide due to 1096 Tokai earthquake and resulting development of coastal topography was inferred based on the analysis of the data.

  3. Examination of level 1.5 earthquake and tsunami in eastern edge of Nankai Trough, Japan

    Akihisa Kitamura

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Shizuoka University

    2017/04/01 - 2020/03/31

    More details Close

    The Japanese government presented simulations of possible maximum seismic movements and tsunami heights (termed Level 2 earthquakes and tsunamis) caused by Nankai megathrust earthquakes, based on recognition of mega-tsunami at the 2011 Tohoku-oki earthquake. Kitamura and co-workers examined tsunami deposits in Shizuoka prefecture, and showed that there is no evidence for a Level 2 tsunami over the past 4000 years. But, two Level 1.5 earthquakes and tsunamis, which are larger than level 1, but smaller than level 2, were detected. One is occurrence of megathrust earthquake and the earthquake-induced active of splay fault at Omaezaki. The other is increase in tsunami wave height was caused by earthquake-induced submarine landslides at Yaizu. This study shows the following findings: (1) The AD1361 Shohei (Koan)Tokai earthquake caused >2.5 m uplift at Omaezaki; (2) Megathrust earthquake occurred at ca AD400 at Suruga Trough. Scientific data of analysis of Yaizu Plain has been submitted.

  4. Development of evaluation method for incoming tsunami based on formation process of tsunami deposits

    HARADA Kenji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Shizuoka University

    2017/04/01 - 2020/03/31

    More details Close

    In this study, we developed a method to evaluate the characteristics of incoming tsunamis based on the formation process of tsunami sediments in order to utilize the information contained in tsunami sediments. The results of the field survey by the Tohoku-Pacific Ocean Earthquake Tsunami, the results of the hydraulic model experiments for tsunami sediments, and the results of numerical calculations for tsunami sediment transport were used to quantitatively confirm the tendency of tsunami sediment formation results to change due to changes in topographic, sediment, and hydraulic conditions (incoming tsunami conditions). In addition, as a method to evaluate the characteristics of incoming tsunamis based on the tsunami sediments, the relationship between the tsunami scale (earthquake scale) and the characteristics of the tsunami sediment distribution on land based on the tsunami numerical calculation was shown from the interrelationship of topography, sediment and tsunami conditions.

  5. Establishment for paleosequake and tsunami scale estimtion method by using integrated earthquake and tsunami record information

    Imai Kentaro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Japan Agency for Marine-Earth Science and Technology

    2016/04/01 - 2020/03/31

    More details Close

    In this study, we defined RIST; the Record Information for Seismic and Tsunami recurrence as (1) tsunami trace, (2) crustal dislocation, (3) tsunami deposit, (4) coastal land-form change, (5) seismic intensity, (6) offshore active fault, and evaluated the source model by using RIST, which can be collected. The effect of the change of the coastline shape on the tsunami inundation analysis was examined for the huge earthquake occurred in the historical periods, also examined the estimation possibility of tsunami source scale by using tsunami deposits. We developed a method to carry out tsunami source estimation by RIST, to apply it to the 1804 Kisakata earthquake. Since crustal dislocation and tsunami generation areas do not always coincide with strong motion generation areas in the source, a rational fault model can be estimated by using tsunami trace, crustal dislocation, and offshore active fault record (Including plate interface) of RIST for cases with tsunamis in historical periods.

  6. Understanding of tsunami events due to great earthquakes occurred in Japan Sea and their tsunami forecast

    Tanioka Yuichiro, Ioki Kei, Yamanaka Yusuke, Razjigaeva Nadezhda, Ganzey Larisa, Kaistrenko Victor

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Hokkaido University

    2015/04/01 - 2019/03/31

    More details Close

    We conducted tsunami deposit surveys at various locations in Primorsky, identified tsunami events, and estimated the age of the events. For tsunamis around the 12th century, a fault model that can explain tsunami deposits on the coast of Hokkaido was estimated by using the tsunami numerical simulation. The total fault length was estimated to be 109 km, and a large slip of 18m was estimated at a 50 km fault on the north side. This estimate is much larger than the previous estimate of 6m. It has become clear that the fault model of the 12-century earthquake is located just between the fault model of the 1993 Hokkaido Nansei-oki earthquake and the fault model of the 1983 Japan Sea earthquake. In addition, the tsunami caused by the volcanic sector collapse due to the eruption of the Oshima-Oshima volcano in 1741 is reproduced by the numerical simulation.

  7. An extended theory of paleomagnetic viscous dating and its application to tsunami boulders in Japan and Tonga

    Nakamura Norihiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2015/04/01 - 2018/03/31

    More details Close

    We proposed a new paleomagnetic method to determine the age of emplacement of tsunamigenic boulders, but some boulders showed an anomalously older age than the one of radioisotope method. We have used Neel's theory of magnetic relaxation (i.e., exponential relaxation law), but the theory disagrees with previous laboratory data for magnetic relaxation. Using a stretched exponential relaxation law with variable power exponents, we found that almost all previous data fit this law. This theoretical extension also explained the problem of older ages. However, we still need to answer the further problem that how do we determine the power exponent from individual boulders. In this project, we published two other papers that related to this research. One is that anisotropy of magnetic susceptibility does not always show a paleocurrent flow of sandy tsunami deposits. The other is that slip zones in Nojima fault zone experienced a temperature rise over 400 C using scanning magnetic microscopes.

  8. Paleotsunami research at small islands for better estimating tsunami source model

    Goto Kazuhisa, Goff James, Chague-Goff Catherine

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2014/04/01 - 2017/03/31

    More details Close

    This study investigated geological evidence of paleotsunami at the islands near mainland of Japan, New Zealand, and United Sates of America. At Hachijo Island in Japan, we found numerous boulders on top of the 5 meter high cliff. Water tank experiment and numerical modeling revealed that these boulders can be explained by high storm wave although tsunamis with shorter wave period can also move these boulders. At Chatham Island in New Zealand, we identified boulders and sand to gravel sheet were deposited together. Field evidence as well as numerical modeling results may imply that these geological evidences could be explained by trans-Pacific tsunamis such as generated along Peru-Chile Trench, although further detail modeling is required. In Hawaii Islands, we identified possible evidence of 1946 Aleutian tsunami. These evidence would be useful to constraint the source model of this tsunami event.

  9. Interdisciplinary research on historical earthquake and tsunami in Sanriku coast

    Fumihiko Imamura, SUGAWARA Daisuke, ISHIMURA Daisuke, NIWA Yuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2014/04/01 - 2017/03/31

    More details Close

    This study performed geological and geomorphological field surveys and laboratory analyses at Sanriku coast of Japan. We revealed thousand-years-long paleotsunami histories at several places. Especially, we found possible evidence of AD869 Jogan tsunami event at central to northern Sanriku coast. This results should be important for estimating the source model since our results define northern extent of the sediments deposited by the Jogan tsunami. Geomorphological and geological research, studying the long term (103~105 year scale) crustal movement, further revealed that northern Sanriku area was slightly uplifted while the southern part was subsided. Numerical modeling for sediment transport is very useful to constrain tsunami source if distribution and thickness of tsunami deposits is used as modeling boundary condition. Sensitivity test of sediment deposition at different geomorphological settings will provide further constraints for tsunami source model.

  10. Geological survey of past tsunamis in the earastern margin of the Japan Sea regarding subduction-zone earthquakes

    SUGAWARA Daisuke

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2013/04/01 - 2015/03/31

    More details Close

    Tsunami traces in the eastern margin of the Japan Sea was investigated and sandy event layers were discovered from the coastal areas of Yamagata Prefecture. Depositional ages of each layer are 11th and 8-9th century, respectively. The sand layers contain brackish diatoms, implying sediment supply from tidal zones through the rivers. Results of numerical modeling of tsunami generation and propagation showed that earthquake tsunami in the offshore of Yamagata is at most 5 m and cannot explain the sandy event layers. A submarine slope failure, which was identified from bathymetry and bottom profiling data, generates a large-scale tsunami with the height of 20 m near the coastline. The tsunami reaches the survey sites and can explain the possible sandy tsunami deposits. In conclusion, this study demonstrated the possibility of occurrence of a large-scale tsunami during 150-200 years after the 869 Jogan earthquake.

  11. A new application of paleomagnetic viscous dating to tsunami boulders in Ishigaki Island, Japan

    NAKAMURA Norihiro, GOTO Kazuhisa, SUGAWARA Daisuke, HATAKEYAMA Nobutatsu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2013/04/01 - 2015/03/31

    More details Close

    We use temperature-dependent viscous remanent magnetization to estimate the emplacement age of tsunamigenic coral boulders along the shorelines of Ishigaki Island, Japan. The time of their deposition by tsunamis has been estimated using radiocarbon dating. Since the time when the coral skeletons were emplaced on the shorelines as boulders by destructive tsunami waves, a new viscous magnetization was partially overprinted in the boulder parallel to the present geomagnetic field. We analyzed two different boulders (200t dated at 2000 years old and 35t dated at 1771AD: Meiwa tsunami). The result implies that the 200 t coral boulder was immobile when the Meiwa tsunami struck the island and moved the 35 t boulder over the 1.0-km-wide reef. This suggests that the earlier tsunami was larger than the Meiwa tsunami. New application of Neel's theory to tsunamigenic coral boulders gives us an opportunity to ascertain the age and transportation mode of individual boulders in this area.

  12. Risk evaluation of the millennium tsunami hazard and recovery process after the damage

    IMAMURA FUMIHIKO, GOTO Kazuhisa, MATSUMOTO Hideaki, KOSHIMURA Shunichi, MAKI Norio, TAKAHASI Tomoyuki, KOIWA Naohito, SUGAWARA Daisuke, TSUJI Yoshinobu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2010/04/01 - 2014/03/31

    More details Close

    The purpose of the research is to evaluate the millennium tsunami hazard ,which is a low frequency giant tsunami disaster which occurs once in about 1000 years, by complementing based on scientific techniques, such as geology, sedimentology, topography, and seismology, in addition to the historical fact and documents in literatures. Millennium tsunami hazard evaluation was carried out in Okinawa and the Tohoku district. First, a possibility that 850yrBP and two terms of 1100 yrBP would be suggested by the investigation and analysis of a coral fossil (tsunami stone) which were launched from tsunami in Yaeyama Islands in addition to the 1771 Meiwa tsunami was shown. Furthermore, interdisciplinary investigation is conducted in Sendai plane that 1260yrBP and 2050 yrBP would is added to the 869 Jogan earthquake. Examination of the tsunami damage function etc. which were obtained by the 2011 Great East Japan Earthquake was also carried out.

Show all Show first 5