Details of the Researcher

PHOTO

Yusuke Mukuhira
Section
Institute of Fluid Science
Job title
Associate Professor
Degree

  • 博士（学術）（東北大学）

  • 修士（環境科学）（東北大学）

Research History 10

  • 2025/04 - Present
    Institute of fluid science, Tohoku University

  • 2020/05 - 2025/09
    Tohoku University　Institute of Fluid Science　Assistant Professor

  • 2021/07 - 2025/03
    Tohoku University　Institute of Fluid Science　Assistant Professor

  • 2021/02 - 2025/03
    Tohoku University

  • 2016/10 - 2018/08
    Massachusetts Institute of Technology　Earth Resource Laboratory　JSPS Overseas Research Fellow

  • 2016/04 - 2016/09
    Tohoku University　Institute of fluid science/Engineering faculty　Postdoc fellow

  • 2013/04 - 2016/03
    Tohoku University　Institute of Fluid Science　JSPS Postdoctoral fellow (PD)

  • 2015/01 - 2015/06
    ETH-Zurich　Swiss Seismological Service　Visiting scientist

  • 2014/08 - 2014/09
    Massachusetts Institute of Technology　Earth Resource Laboratory　Visiting scientist

  • 2010/04 - 2013/03
    Tohoku University　Graduated school of environmental studies　Research Fellow (DC1)

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Education 3

  • Tohoku University　Graduate school of environmental studies

    2010/04 - 2013/03

  • Tohoku University　Graduate school of environmental studies

    2008/04 - 2010/03

  • Tohoku University　School of Engineering

    2004/04 - 2008/03

Committee Memberships 3

  • The 4th International Conference on Coupled Processes in Fractured Geological Media: Observation, Modeling, and Application (CouFrac2024)　Local Organizing Committee

    2024/01 - Present

  • 石油技術協会　生産技術委員会委員

    2021/04 - Present

  • 日本地熱学会　国際委員会委員

    2018/10 - Present

Professional Memberships 5

  • JAPAN GEOSCIENCE UNION

  • Society of Exploration Geophysicists

  • American Geophysical Union

  • THE SEISMOLOGICAL SOCIETY OF JAPAN

  • THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

Research Interests 5

  • hydrology

  • signal processing

  • Geomechanics

  • Seismology

  • Geophysics

Research Areas 2

  • Energy / Earth resource engineering, energy science / Geophysics

  • Natural sciences / Solid earth science / seismology

Awards 18

  1. 石油技術協会令和7年度春季講演会作井部門 石油技術協会優秀発表賞（ポスター発表）

    2025/06　石油技術協会　スラリーによる流路閉塞現象に関する実験的研究

  2. Best Poster Presentation Award

    2024/11　International society of rock mechanics, Commission on Coupled THMC Process in Fractured Rock　Multidirectional fracturing of rock using shear thickening fluid

  3. Best Poster Presentation Award

    2024/11　International society of rock mechanics, Commission on Coupled THMCProcess in Fractured Rock　Discrete Element Modeling of Rock Fracturing with Shear Thickening Fluid

  4. 第150回（2024年度春季）学術講演会 最優秀発表賞

    2024/07　物理探査学会 学術講演委員会　Double-difference法に基づいた地震波速度と減衰構造の推定：奥会津地熱地域での涵養注水試験への適用事例

  5. 石油技術協会優秀発表賞（ポスター発表）

    2024/06　石油技術協会　せん断増粘流体を用いた岩石破砕の個別要素法によるシミュレーションに関する研究

  6. 2023 Japanese Society for Rock Mechanics Award

    2024/04　Laboratory hydraulic shearing of granitic fractures with surface roughness under stress states of EGS: Permeability changes and energy balance

  7. Student Poster Award

    2023/08　WRI-17　Microseismicity analysis in the Okuaizu geothermal field, Japan

  8. 第６回東北大学若手アンサンブルワークショップポスター賞

    2021/03　東北大学附置研究所若手アンサンブルプロジェクト　群発地震の逆解析による沈み込み 帯の流体ダイナミクスの解明

  9. 令和 2 年度科学技術分野の文部科学大臣表彰受賞 若手科学者賞

    2020/04　文部科学省

  10. 優秀ポスター賞

    2019/06　第５回東北大学若手研究者アンサンブルワークショップ　地下の逆問題解決に対するチート的アプローチ

  11. Paper award from Japanese society for rock mechanics (JSRM)

    2019/05　Pore pressure migration during hydraulic stimulation due to permeability enhancement by low-pressure subcritical fracture slip

  12. One of the 5 most highly cited papers during 2014, 2015 and up until June 2016 in Geothermics

    2016/12　The editors of Geothermics　“Characteristics of large-magnitude microseismic events recorded during and after stimulation of a geothermal reservoir at Basel, Switzerland”, Geothermics, 45, pp 1-17, 2013.

  13. 優秀ポスター賞

    2015/07　Ensemble Workshop for Young Members in Research Institute of Tohoku Univ.

  14. GRC Best Presentation Award

    2014/10　2014 GRC Annual Meeting　The numerical simulation for change in fracture aperture associated with cold fluid injection

  15. Best presentation award

    2014/09　Geothermal Resource Council 2014　Numerical thermo-elastic simulation for change in fracture aperture associated with cold fluid injection

  16. Best Paper Award

    2010/07　Renewable Energy 2010　Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoirs at Cooper Basin, Australia and Basel, Switzerland

  17. Best student award

    2010/03　Graduate school of environmental studies, Tohoku University

  18. Best Student Award

    2009/10　Japan Formation Evaluation Symposium 2009　Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoir at Basel, Switzerland

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Papers 65

  1. Creating multidirectional fractures through particle jamming Peer-reviewed

    Yusuke Mukuhira, Ryota Goto, Noriaki Watanabe, Kazumasa Sueyoshi, Kohei Takuma, Rongchang Zhang, Tongfei Tian, Vladimir Sokolovski, Makoto Naoi, Yuko Arai, Takaaki Tomai, Masaoki Uno, Takatoshi Ito

    International Journal of Rock Mechanics and Mining Sciences　188　106051-106051　2025/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.ijrmms.2025.106051 　

    ISSN： 1365-1609

  2. Stable-to-dynamic expansion of fault slipping area through fluid injection observed in laboratory experiments using a sub-meter scale specimen Peer-reviewed

    Takatoshi Ito, Koji Aoki, Yusuke Mukuhira, Yasuo Yabe

    Earth, Planets and Space　76　(1)　2024/11/22

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40623-024-02092-7 　

    eISSN： 1880-5981

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    Abstract In the field, locally applied fluid pressure can initiate fault slip, which may expand unstably over a wide area under certain conditions, generating elastic waves and inducing earthquakes. Therefore, examining the unstable expansion of the initial slip is important. However, reproducing this process in laboratory experiments, such as triaxial loading tests on small cylindrical specimens with inclined faults, is challenging. To achieve this, we prepared a sub-meter-scale cubic specimen, which was separated into two triangular prisms by a model fault. The specimen was subjected to biaxial compression of different magnitudes. A 2D array of strain gauges was embedded beneath the fault plane to measure the changes in shear strain with fault slip driven by fluid injection. Based on the experimental results, we discussed the features of the injection-induced fault slips that lead to earthquakes. The strain increased locally around the edge of the fault slipping area by approximately 10 με, which is equivalent to a shear stress of ~ 0.1 MPa. The fault slipping area first expanded gradually and then unstably beyond the fluid invasion area approximately 3 s after the slip was initiated. The unstable expansion of initial slips was suppressed by reducing the initial shear stress on the fault by 0.3 MPa. In this case, the initial shear stress was possibly too small for additional stress to accumulate at the edge of the fault-slipping area to overcome the static frictional strength of the fault. Our experimental study explicitly confirms that injection-induced aseismic slip can outpace the fluid migration front, finally leading up to a runaway rupture. It also confirms that the level of initial shear stress is important in controlling the rupture size under fluid injection. Graphical Abstract

  3. Multidirectional fracturing of rock using shear thickening fluid Peer-reviewed

    Kouta Tokutake, Kazumasa Sueyoshi, Yusuke Mukuhira, Masaoki Uno, Noriaki Watanabe

    Proceedings of Courfac 2024　2024/11

  4. Discrete element modeling of rock fracturing with shear thickening fluid Peer-reviewed

    Ryu Wada, Yusuke Mukuhira, Hiroyuki Shimizu, Shingo Ishihara, Noriaki Watanabe, Lu Wang, Takatoshi Ito

    Proceedings of Coufrac 2024　2024/11

  5. Dynamic tensile behavior of hollow rocks under pre-tension condition Peer-reviewed

    Lui Wang, Yusuke Mukuhira

    Lui Wang, Yusuke Mukuhira　2024/11

  6. Temporal variations in seismic velocity and attenuation structure in response to a water recharge test in the Okuaizu geothermal field, Fukushima, Japan Peer-reviewed

    Kyosuke Okamoto, Naoki Aoyagi, Yusuke Mukuhira, Dian Darisma, Hiroshi Asanuma

    Proceedings of Coufrac 2024　2024/11

  7. Basic Study on the Control of the Fluid Flow with Functional Fluid Peer-reviewed

    Yusuke Mukuhira, Tongfei Tian, Shingo Ishihara, Takaaki Tomai, Yuko Arai, Masaoki Uno, Rongchang Zhang, Lu Wang, Takatoshi Ito

    Proceedings of Coufrac 2024　2024/11

  8. Building the fracture network model for the Okuaizu geothermal field based on microseismic data analysis Peer-reviewed

    Dian Darisma, Yusuke Mukuhira, Kyosuke Okamoto, Naoki Aoyogi, Takahiko Uchide, Takuya Ishibashi, Hiroshi Asanuma, Takatoshi Ito

    Earth, Planets and Space　76　(107)　1-17　2024/08/06

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40623-024-02049-w 　

    eISSN： 1880-5981

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    Abstract Understanding flow behavior in a geothermal reservoir is important for managing sustainable geothermal energy extraction. Fluid flow in geothermal reservoirs generally occurs in complex existing fracture systems in which the reservoirs are situated in highly fractured rocks. To simulate a discrete fracture model, the location and orientation of the fracture were computed using statistical processes and observational data. In many cases, estimating the location and orientation of fractures from 1D borehole logging data is challenging. In this study, we used microseismic data to build the fracture network systems and extract the detailed positions and dimensions of the fractures. We used the microseismic data recorded at the Okuaizu Geothermal Field, Fukushima Prefecture, Japan, from 2019 to 2021. First, we located the hypocenters, removing the effect of uncertainty in the velocity structure of the geothermal fluids. We relocated and clustered the seismic events based on waveform similarity. We analyzed each cluster to define the fracture orientation using principal component analysis (PCA) and focal mechanism (FM) analysis. We used the P polarity with the S/P ratio as a constraint for a better fault-plane solution. With PCA, we can extract the fracture dimension of each cluster. Our cluster analysis showed that the clusters were not always planar fractures, and we interpreted them as fracture zones. Based on the consistency between PCA and FM, each cluster/fracture zone was classified into three conceptual models to characterize the fracture network system in this field. This model showed variations in the orientation of small fractures within the fracture zone. We characterized the spatial variation in fracture distribution and orientations in the reservoir and demonstrated the fracture network system of this field. The fracture zone near the injection well has a N–S strike, and the dip is above 80°; however, the fracture zone in the northeastern part of the injection well has a NW–SE strike with a dip between 60° and 80°. The fracture network system estimated in this study is crucial for robust reservoir modeling because our model is more realistic, observation-orientated, and includes local anomalies of reservoir properties. Graphical Abstract

  9. Dynamic triggering of earthquakes and the role of overpressure fluids in active geothermal areas in Yunnan, China International-journal

    Zhiwei Wang, Xinglin Lei, Shengli Ma, Hong Fu, Xiaojing Hu, Kaiying Wang, Yusuke Mukuhira, Changrong He

    Tectonophysics　882　230361-230361　2024/07/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.tecto.2024.230361 　

    ISSN： 0040-1951

  10. Effect of shear thickening fluid on the hydraulic fracturing behavior International-journal Peer-reviewed

    Mukuhira, Yusuke, Watanabe, Noriaki, Sueyoshi, Kazumasa, Takuma, Kohei, Zhang, Rongchang, Tomai, Takaaki, Arai, Yuko, Uno, Masaoki, Ito, Takatoshi, Goto , Ryota, Tongfei, Tian, Sokolovski, Vladimir, Naoi, Makoto

    Proceedings of the 58th US Rock Mechanics / Geomechanics Symposium　2024/06/24

    Publisher: American Rock Mechanics Association

  11. P–S Travel-Time Detection and Hypocenter Location of Low-SNR Events Using Polarization in the Time–Frequency Domain Peer-reviewed

    Jingyi Sun, Yusuke Mukuhira, Takayuki Nagata, Taku Nonomura, Michael C. Fehler, Hirokazu Moriya, Nori Nakata, Takatoshi Ito

    Bulletin of the Seismological Society of America　2024/06/07

    Publisher: Seismological Society of America (SSA)

    DOI： 10.1785/0120230280 　

    ISSN： 0037-1106

    eISSN： 1943-3573

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    ABSTRACT The detection of microseismic events with low signal-to-noise ratios (SNRs) can expand the seismic catalog and provide opportunities for a deeper understanding of subsurface reservoir features. We propose a novel polarization analysis method for comprehensively detecting S-wave arrival and P–S travel time of low-SNR events from the particle motion of P and S waves in the time and frequency domain. In most circumstances, the direct S-wave particle motion shows a flat plane, and that is perpendicular to the direct P-wave motion direction. We combine these two properties to detect the S-wave arrival of low-SNR events. Our previous study applied spectral matrix (SPM) analysis to characterize the 3D particle motion of P waves. However, SPM analysis had limitations in detecting S-wave arrivals. We then introduce the time-delay components of the SPM (complex spectral matrix [cSPM]) to characterize the S-wave particle motion, separate the S-wave from the noise, and detect S-wave arrivals. Using the cSPM analysis method, we assess the planarity and perpendicularity of the S-wave polarization in the time and frequency domains. We then define a characteristic function that detects S-wave arrivals by combining two properties, planarity and perpendicularity, to detect more low-SNR events. The P–S travel time is obtained by setting the threshold values for the P- and S-wave characteristic functions. We apply our method to 4 hr and 2 months of field data recorded at the Groningen field in the Netherlands. Our method successfully detects the P–S travel time of all catalog events and several additional undetected events. We locate the hypocenter of all events using the detected P–S travel times with a grid-based search method.

  12. On the b-value dependency of injection-induced seismicity on geomechanical parameters International-journal International-coauthorship Peer-reviewed

    Y. Mukuhira, M.C. Fehler, E.K. Bjarkason, T. Ito, H. Asanuma

    International Journal of Rock Mechanics and Mining Sciences　174　105631-105631　2024/02

    Publisher: Elsevier BV

    DOI： 10.1016/j.ijrmms.2023.105631 　

    ISSN： 1365-1609

  13. Polarization Analysis in Time-Frequency Domain by Complex Spectral Matrix -Application to Various Mode of Seismogram- International-journal Peer-reviewed

    Takayuki Nagata, Yusuke Mukuhira, Jingyi Sun, Hirokazu Moriya, Takahiro Shiina, Taku Nonomura

    IEEE Transactions on Geoscience and Remote Sensing　1-1　2024/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI： 10.1109/tgrs.2024.3352817 　

    ISSN： 0196-2892

    eISSN： 1558-0644

  14. Machine learning automatic picker for geothermal microseismicity analysis for practical procedure to reveal fine reservoir structures International-journal Peer-reviewed

    Kyosuke Okamoto, Yusuke Mukuhira, Dian Darisma, Hiroshi Asanuma, Hirokazu Moriya

    Geothermics　116　102832-102832　2024/01

    Publisher: Elsevier BV

    DOI： 10.1016/j.geothermics.2023.102832 　

    ISSN： 0375-6505

  15. Laboratory hydraulic shearing of granitic fractures with surface roughness under stress states of EGS: Permeability changes and energy balance International-journal Peer-reviewed

    Takuya Ishibashi, Hiroshi Asanuma, Yusuke Mukuhira, Noriaki Watanabe

    International Journal of Rock Mechanics and Mining Sciences　170　105512-105512　2023/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.ijrmms.2023.105512 　

    ISSN： 1365-1609

  16. Scaling Microseismic Cloud Shape during Hydraulic Stimulation using In‐situ Stress and Permeability Peer-reviewed

    Y. Mukuhira, M. Yang, T. Ishibashi, K. Okamoto, H. Moriya, Y. Kumano, H. Asanuma, S. A. Shapiro, J. L. Rubinstein, T. Ito, K. Yan, Y. Zuo

    Journal of Geophysical Research: Solid Earth　128　(8)　2023/08/03

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2023jb026839 　

    ISSN： 2169-9313

    eISSN： 2169-9356

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    Abstract Forecasting microseismic cloud shape as a proxy of stimulated rock volume may improve the design of an energy extraction system. The microseismic cloud created during hydraulic stimulation of geothermal reservoirs is known empirically to extend in the general direction of the maximum principal stress. However, this empirical relationship is often inconsistent with reported results, and the cloud growth process remains poorly understood. This study investigates microseismic cloud growth using data obtained from a hydraulic stimulation project in Basel, Switzerland, and explores its correlation with measured in‐situ stress. We applied principal component analysis to a time series of microseismicity for macroscopic characterization of microseismic cloud growth in two‐ and three‐dimensional space. The microseismic cloud, in addition to extending in the general direction of maximum principal stress, expanded in the direction of intermediate principal stress. The orientation of the least microseismic cloud growth was stable and almost identical to the minimum principal stress direction. Further, microseismic cloud shape ratios showed good agreement when compared with in‐situ stress magnitude ratios. The permeability tensor estimated from microseismicity also provided a good correlation in terms of direction and magnitude with the microseismic cloud growth. We show that in‐situ stress plays a dominant role by controlling the permeability of each existing fracture in the reservoir fracture system. Consequently, microseismic cloud growth can be scaled by in‐situ stress as a first‐order approximation if there is sufficient variation in the orientation of existing faults.

  17. Upward earthquake migration in the northeastern Noto Peninsula, Japan, initiated from a deep ring‐shaped cluster: Possibility of fluid leakage from a hidden magma system International-journal Peer-reviewed

    Keisuke Yoshida, Masaoki Uno, Toru Matsuzawa, Yohei Yukutake, Yusuke Mukuhira, Hiroshi Sato, Takeyoshi Yoshida

    Journal of Geophysical Research: Solid Earth　128　(6)　2023/06/08

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022jb026047 　

    ISSN： 2169-9313

    eISSN： 2169-9356

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    Abstract This study describes an ongoing intense earthquake swarm in the crust of the northeastern Noto Peninsula, Japan, that began around the end of 2019. Fluid movement related to volcanic activity is often involved in earthquake swarms in the crust. However, no volcanic activity has occurred in this region since the Middle Miocene (15.6 Ma). This study investigates the cause of this earthquake swarm based on the spatiotemporal evolution of earthquake hypocenters and seismic reflectors. The hypocenter relocation of 10,940 earthquakes (M > 1) reveals that they are all crustal and migrated upward, activating a complex network of faults at depths shallower than 20 km. The initiation of this earthquake swarm occurred at a locally deep depth (z = 17 km), and the local hypocenter distribution shows a characteristic circular pattern. We find a distinctive S‐wave reflector in the immediate vicinity. A low‐velocity anomaly exists below the reflector, and a high helium isotope ratio and a low‐gravity anomaly were observed at the surface. These observations suggest that the current seismicity is associated with fluids released by ancient or possibly unrecognized modern magmatic activity, although no volcanic activity has been documented in this area for 15 million years. Significant crustal deformation was observed during this swarm and is probably related to the fluid movement and aseismic deformation that contributed to this earthquake swarm. The strongest M5.4 earthquake (as of October 2022) occurred near the migration front on the largest planar structure, leaving the shallow extension unruptured.

  18. Hidden magma system causing intense earthquake swarm in the northeastern Noto Peninsula, Japan

    Keisuke Yoshida, Masaoki Uno, Toru Matsuzawa, Yohei Yukutake, Yusuke mukuhira, Hiroshi Sato, Takeyoshi Yoshida

    2022/11/19

    DOI： 10.1002/essoar.10512876.1 　

  19. Slab-derived fluid storage in the crust elucidated by earthquake swarm International-journal Peer-reviewed

    Yusuke Mukuhira, Masaoki Uno, Keisuke Yoshida

    COMMUNICATIONS EARTH & ENVIRONMENT　3　(1)　2022/11

    DOI： 10.1038/s43247-022-00610-7 　

    eISSN： 2662-4435

  20. P-S travel time detection of low SNR induced seismicity based on time-domain particle motion analysis International-journal Peer-reviewed

    J. Sun, Y. Mukuhira, T. Nagata, T. Nonomura, H. Moriya, T.Ito

    Proc. the 4th lnternational Conference on Rock Dynamics and Applications　2022/08

  21. Physical property studies to elucidate the source of seismic reflectivity within the ICDP DSeis seismogenic zone: Klerksdorp goldfield, South Africa

    Nomqhele Z. Nkosi, Musa S.D. Manzi, Michael Westgate, Dave Roberts, Raymond J. Durrheim, Hiroshi Ogasawara, Martin Ziegler, Michael Rickenbacher, Bennie Liebenberg, Tullis C. Onsto, DSeis Team

    International Journal of Rock Mechanics and Mining Sciences　155　105082-105082　2022/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.ijrmms.2022.105082 　

    ISSN： 1365-1609

  22. 地熱開発におけるAE法の適用 Invited Peer-reviewed

    森谷祐一, 椋平祐輔

    非破壊検査　71　(6)　245-250　2022/06

    Publisher: 一般社団法人日本非破壊検査協会

  23. 地熱地域の地震観測網を対象とした深層学習によるP，S波の自動読み取り International-coauthorship

    岡本京祐, 椋平祐輔, 浅沼宏, Häring Markus

    日本地熱学会令和3年学術講演会講演要旨集　144-144　2021/10

  24. 注水によるせん断すべり挙動解明のための実験的研究

    青木晃司, 椋平祐輔, 伊藤 高敏

    日本地熱学会令和3年学術講演会講演要旨集　131-131　2021/10

  25. 地殻応力にスケールされる微小地震クラウドの成長過程 International-coauthorship

    椋平祐輔, 伊藤高敏, 岡本京祐, 石橋琢也, 浅沼宏, 熊野裕介, 森谷祐一, Meihua Yang, Kangnan Yan, Yunhei Zuo, Justin Rubinstein, Markus O. Häring

    日本地熱学会令和3年学術講演会講演要旨集　42-42　2021/10

  26. Detection of S-wave Arrival of Low SNR Event using Polarization International-journal

    S. Jingyi, Y. Mukuhira, N. Nakata

    Proc. the 21st International Symposium on Advanced Fluid Information　2021/10

  27. Understanding failure phenomena accelerated by machine learning for subsurface energy development International-journal

    K. Aoki, Y. Mukuhira, M. Naoi, T. Ito

    Proc. the 21st International Symposium on Advanced Fluid Information　2021/10

  28. Application of core-based inversion to reconstruct stress field in an underground geoscience laboratory International-journal International-coauthorship

    X. Ma, Y. Mukuhira, T. Ito

    Proc. the 21st International Symposium on Advanced Fluid Information　2021/10

  29. Detection of P-S travel time for Low SNR Event by particle motion analysis International-journal Peer-reviewed

    Sun Jingyi, Yusuke Mukuhira, Takayuki Nagata, Taku Nonomura, Hirokazu Moriya, Takatoshi Ito

    Proc. the 14th SEGJ International Symposium　2021/10

  30. Development of microseismic monitoring system using deep learning P- and S-waves picker in geothermal fields International-journal International-coauthorship Peer-reviewed

    Kyosuke Okamoto, Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    Proc. the 14th SEGJ International Symposium　2021/10

  31. Extension of low-SNR coherent signal detection method based on spectral matrix analysis by using wavelet transformation and time delay coordinate International-journal Peer-reviewed

    Takayuki Nagata, Yusuke Mukuhira, Taku Nonomura

    Proc. the 14th SEGJ International Symposium　2021/10

  32. Characteristic of Pore Pressure Migration Clarified by Multidisciplinary Microseismic Analysis International-journal International-coauthorship Peer-reviewed

    Yusuke Mukuhira, Takatoshi Ito, Hirokazu Moriya, Hiroshi Asanuma, Markus Häring

    Proceedings of WGC2020+1　2021/07

  33. Injection-Induced Seismicity Size Distribution Dependent on Shear Stress International-journal International-coauthorship Peer-reviewed

    Y. Mukuhira, M. C. Fehler, T. Ito, H. Asanuma, M. O. Häring

    Geophysical Research Letters　48　(8)　2021/04

    DOI： 10.1029/2020GL090934 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  34. 既存き裂情報と岩石力学情報から推定する誘発地震活動 International-coauthorship Peer-reviewed

    椋平祐輔, Martin Ziegler, 伊藤高敏, 浅沼宏, Markus O. Häring

    第15回岩の力学国内シンポジウム要旨集　2021/01

  35. Low SNR microseismic detection using direct P-wave arrival polarization Peer-reviewed

    Y. Mukuhira, O.V. Polianinikov, M.C. Fehler, H. Moriya

    Bulletin of the Seismological Society of America　110　(6)　3115-3129　2020

    DOI： 10.1785/0120190192 　

    ISSN： 0037-1106

    eISSN： 1943-3573

  36. Evaluation of flow paths during stimulation in an EGS reservoir using microseismic information Peer-reviewed

    Yusuke Mukuhira, Takatoshi Ito,Hiroshi Asanuma,Markus Häring

    Geothermics　87　2020

    DOI： 10.1016/j.geothermics.2020.101843 　

    ISSN： 0375-6505

    eISSN： 1879-3576

  37. Introduction of natural fracture information to induced seismicity analysis Peer-reviewed

    Y. Mukuhira, M. Ziegler, T. Ito, H. Asanuma, M.O. Häring

    Proc. YSRM2019 & REIF 2019　2019/12

  38. In-situ stress constraints on the focal mechanisms of induced seismicity Peer-reviewed

    Y. Mukuhira, T. Ito, M.C. Fehler, M. Naoi, H. Moriya, H. Asanuma, M. O. Häring

    Proc. ISRM2019　1380-1387　2019/09

  39. Introduction of in-situ stress information from borehole logging to source characterization of microseismic events Peer-reviewed

    Yusuke Mukuhira, Kazumasa Fuse, Makoto Naoi, Takatoshi Ito, Michael C. Fehler, Hirokazu Moriya, Hiroshi Asanuma, Markus O. Häring

    Proc. SEGJ symposium　2018/11

  40. Low S/N seismicity detection using features of 3D particle motions of direct P-waves Peer-reviewed

    Yusuke Mukuhira, Oleg V. Poliannikov, Michael C. Fehler, Hirokazu Moriya

    2018 SEG International Exposition and Annual Meeting, SEG 2018　2882-2886　2018

    DOI： 10.1190/segam2018-2965365.1 　

  41. Hybrid focal mechanism determination: Constraining focal mechanisms of injection induced seismicity using in situ stress data Peer-reviewed

    Y. Mukuhira, K. Fuse, M. Naoi, M. C. Fehler, H. Moriya, T. Ito, H. Asanuma, M. O. Häring

    Geophysical Journal International　215　(2)　1427-1441　2018

    DOI： 10.1093/GJI/GGY333 　

    ISSN： 0956-540X

    eISSN： 1365-246X

  42. Buried microseismic detection from continuous data using spectral matrix analysis of triaxial particle motion Peer-reviewed

    Yusuke Mukuhira, Michael Fehler, Moriya Hirokazu

    SEG Technical Program Expanded Abstracts 2017　2797-2801　2017/09

    DOI： 10.1190/segam2017-17589398.1 　

    ISSN： 1052-3812

    eISSN： 1949-4645

  43. Pore pressure migration during hydraulic stimulation due to permeability enhancement by low-pressure subcritical fracture slip Peer-reviewed

    Yusuke Mukuhira, Hirokazu Moriya, Takatoshi Ito, Hiroshi Asanuma, Markus Häring

    Geophysical Research Letters　44　(7)　3109-3118　2017/04

    DOI： 10.1002/2017GL072809 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  44. Pore pressure behavior at the shut-in phase and causality of large induced seismicity at Basel, Switzerland Peer-reviewed

    Y. Mukuhira, C. Dinske, H. Asanuma, T. Ito, M. O. Häring

    Journal of Geophysical Research: Solid Earth　122　(1)　411-435　2017/01/01

    DOI： 10.1002/2016JB013338 　

    ISSN： 2169-9313

    eISSN： 2169-9356

  45. Physics-based seismic evaluation method: Evaluating possible seismic moment based on microseismic information due to fluid stimulation Peer-reviewed

    Yusuke Mukuhira, Hiroshi Asanuma, Takatoshi Ito, Markus O. Häring

    Geophysics　81　(6)　KS195-KS205　2016/11/01

    DOI： 10.1190/GEO2015-0648.1 　

    ISSN： 0016-8033

    eISSN： 1942-2156

  46. Stress state analysis of a fault plane with large induced seismicity Peer-reviewed

    Y. Mukuhira, T. Ito, H. Asanuma, M. Haring

    50th US Rock Mechanics / Geomechanics Symposium 2016　4　3287-3293　2016

  47. Numerical thermo-elastic simulation for change in fracture aperture associated with cold fluid injection Peer-reviewed

    Kosuke Kaneta, Yusuke Mukuhira, Takatoshi Ito

    Transactions - Geothermal Resources Council　38　301-304　2014

    ISSN： 0193-5933

  48. Study on trigger mechanism of large induced seismicity at a hydraulic stimulation in Basel, Switzerland Peer-reviewed

    Y. Mukuhira, H. Asanuma, M. Häring

    Proc. SEGJ Symposium 2013　2013/11

  49. Geomechanical interpretation of induced seismicity observed at Basel geothermal reservoir Peer-reviewed

    Y. Mukuhira, H. Asanuma, M. Häring

    Proc. RS2013　194-201　2013/08

  50. Seismostatical modeling of earthquakes from geothermal fields Peer-reviewed

    T. Eto, H. Asanuma, M. Adachi, K. Saeki, K. Aoyama, H. Ozeki, Y. Mukuhira

    Proc. RS2013　214-221　2013/08

  51. Application of the ETAS seismostatistical model to microseismicity from geothermal fields Peer-reviewed

    Tai Eto, Hiroshi Asanuma, Masaho Adachi, Kazuhiro Saeki, Kengo Aoyama, Hitoshi Ozeki, Yusuke Mukuhira, Markus Har̈ing

    Transactions - Geothermal Resources Council　37　(PART 1)　149-153　2013

    ISSN： 0193-5933

  52. Characteristics of large-magnitude microseismic events recorded during and after stimulation of a geothermal reservoir at Basel, Switzerland Peer-reviewed

    Yusuke Mukuhira, Hiroshi Asanuma, Hiroaki Niitsuma, Markus O. Häring

    Geothermics　45　1-17　2013/01

    DOI： 10.1016/j.geothermics.2012.07.005 　

    ISSN： 0375-6505

  53. Fault plane solutions of earthquakes from deep geothermal reservoirs

    H. Asanuma, Y. Mukuhira, S. Mitsumori, M. Häring, D. Wyborn, M. Adachi

    Proc. EGU General Assembly　2012

  54. Correlation between the coulomb stress and occurrence of the large induced seismicity at Basel, Switzerland in 2006 Peer-reviewed

    Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    Transactions - Geothermal Resources Council　36 1　523-528　2012

    ISSN： 0193-5933

  55. Characteristics of large seismic events observed during a stimulation of geothermal reservoir at Basel 2006 Peer-reviewed

    Y. Mukuhira, H. Asanuma, H. Niitsuma, M. Häring

    Proc. SEGJ Symposium 2011　116-119　2011/11

  56. Characteristics of microearthquakes at Yanaizu-Nishiyama geothermal field Peer-reviewed

    H. Asanuma, S. Mitsumori, M. Adachi, K. Saeki, K. Aoyama, H. Ozeki, Y. Mukuhira, H. Niitsuma

    Transactions - Geothermal Resources Council　35 2　1613-1616　2011

    ISSN： 0193-5933

  57. Identification of fracture orientation for large induced seismicity recorded at Basel, Switzerland in 2006 Peer-reviewed

    Yusuke Mukuhira, Hiroshi Asanuma, Hiroaki Niitsuma, Markus Häring

    Transactions - Geothermal Resources Council　35 1　487-491　2011

    ISSN： 0193-5933

  58. Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoirs at Cooper Basin, Australia and Basel, Switzerland

    Y. Mukuhira, H. Asanuma, H. Nozaki, H. Niitsuma, D. Wyborn, M. Häring

    Proc. RE2010　2010/06

  59. Estimation of stimulation process of HDR/EGS reservoirs by analysis of microseismic multiplets

    H.Asanuma, Y. Kumano, Y. Kenmoku, Y. Kawamura, Y. Mukuhira, H. Niitsuma, D. Wyborn, M. Haring

    Proc. RE2010　2010/06

  60. Analysis of microseismic events with larger magnitude collected at Cooper Basin, Australia and Basel, Switzerland Peer-reviewed

    Y. Mukuhira, H. Asanuma, H. Nozaki, H. Niitsuma, D. Wyborn, M. Häring

    Proc. WGC2010　2010/04

  61. Investigation of physics behind large magnitude microseismic events observed at Basel, Switzerland Peer-reviewed

    H. Asanuma, Y. Mukuhira, H. Niitsuma, M. Häring

    Proc. 2nd European Geothermal Review　47-51　2010

  62. Estimation of source parameter of microseismic events with large magnitude collected at Basel, Switzerland in 2006 Peer-reviewed

    Yusuke Mukuhira, Hiroshi Asanuma, Hiroaki Niitsuma, Markus Häring, Nicholas Deichmann

    Transactions - Geothermal Resources Council　34 1　375-380　2010

    ISSN： 0193-5933

  63. Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoir at Basel, Switzerland Peer-reviewed

    Y. Mukuhira, H. Asanuma, H. Niitsuma, M. H Häring, N. Deichmann

    Proc. 15th Formation Evaluation Symposium of Japan　2009/10

  64. Relationship of pore pressure to large microseismic events during hydraulic stimulation at Basel, Switzerland, in 2006 Peer-reviewed

    Yusuke Mukuhira, Hiroshi Asanuma, Hiroaki Niitsuma, Markus Häring, Nicholas Deichmann

    Transactions - Geothermal Resources Council　33　298-302　2009

    ISSN： 0193-5933

  65. Characterization of microseismic events with larger magnitude collected at Basel, Switzerland in 2006 Peer-reviewed

    Yusuke Mukuhira, Hiroshi Asanuma, Hiroaki Niitsuma, Ulrich Schanz, Markus Häring

    Transactions - Geothermal Resources Council　32　74-80　2008

    ISSN： 0193-5933

Show all ︎Show first 5

Misc. 24

  1. Summary of “Laboratory hydraulic shearing of granitic fractures with surface roughness under stress states of EGS: Permeability changes and energy balance”

    Takuya ISHIBASHI, Hiroshi ASANUMA, Yusuke MUKUHIRA, Noriaki WATANABE

    International Journal of the JSRM　21　(1)　2025/02/14

    DOI： 10.11187/ijjsrm.250101 　

  2. Automatic event picker based on deep leaning for seismic network in geothermal fields and detailed understanding of reservoir structures

    岡本京祐, 椋平祐輔, 浅沼宏, 森谷祐一

    日本地熱学会学術講演会講演要旨集　2023　2023

  3. スペクトル行列解析を用いた低SNR地震動検出手法の時間遅延座標による拡張

    永田貴之, 椋平祐輔, 野々村拓

    2021年度統計関連学会連合大会　2021　2021/09

  4. 主応力比情報を用いた微小地震の断層面解範囲絞り込み

    椋平 祐輔, 伊藤 高敏, 浅沼 宏, Markus O. Häring

    日本地熱学会令和2 年学術講演会要旨集　2020/11

  5. Low-SNR Microseismic Detection Using Direct P-Wave Arrival Polarization International-coauthorship

    椋平 祐輔, Oleg Poliannikov, Michael Fehler, 森谷 祐一

    日本地震学会 2020 年度秋季大会要旨集　2020/10

  6. Case Studies on Worldwide Fluid-Induced Seismicity in Geothermal and Oil/Gas Field

    Yusuke Kumano, Kazuhiko Tezuka, Hiroshi Asanuma, Takuya Ishibashi, Kyosuke Okamoto, Katsuya Kiyono, Yusuke Mukuhira

    Proceedings of the Seventeenth International Conference on Flow Dynamics　248-249　2020/10

  7. Estimation of focal mechanisms of large number of induced seismicity to understand fracture system in the geothermal reservoir International-coauthorship

    Kangnan Yan, Yusuke Mukuhira, Takatoshi Ito, Yinhui Zuo, Hiroshi Asanuma, Markus O Häring

    Proceedings of JpGU-AGU Joint Meeting 2020　2020/07

  8. Investigation of the physical link between the injection induced seismicity and information from borehole logging International-coauthorship

    Yusuke Mukuhira, Martin Ziegler, Takatoshi Ito, Hiroshi Asanuma, Markus O Häring

    Proceedings of JpGU-AGU Joint Meeting 2020　2020/07

  9. Constraint on the range of the focal mechanism of microseismicity with In-situ Stress Information

    椋平祐輔, 直井誠, 森谷祐一, 伊藤高敏, 浅沼宏, HAERING Markus O.

    石油技術協会誌(CD-ROM)　85　(1-6)　2020

    ISSN： 2436-2840

  10. 注水による断層すべりの発生機構に関するシミュレーション

    横山 佳祐, 椋平 祐輔, 伊藤 高敏

    日本地熱学会令和元年学術講演会要旨集　2019/11

  11. 地殻応力情報を用いた微小地震の断層面解範囲絞り込み

    椋平 祐輔, 直井 誠, Michael C. Fehler, 森谷 祐一, 伊藤 高敏, 浅沼 宏, Markus O. Häring

    日本地熱学会令和元年学術講演会要旨集　2019/11

  12. き裂システムに対する注水時の間隙水圧伝播

    椋平 祐輔, 森谷 祐一, 伊藤 高敏, 浅沼 宏, Markus O. Häring

    日本地熱学会平成30年学術講演会要旨集　2018/11

  13. Estimation of Fracture Permeability by Integrating Microseismic Observational Data and Reservoir Engineering Modeling International-coauthorship

    Yusuke Mukuhira, Jack H. Norbeck, Justin L. Rubinstein

    Proceedings of the 18th International Symposium on Advanced Fluid Information　2018/11

  14. Link between tracer and microseismic analysis to comprehensive understanding of hydraulic feature of fractured geothermal reservoir

    Suzuki Anna, Mukuhira Yusuke, Ito Takatoshi, Horne Ronald N, Fehler M. C, Kang Peter

    Proceedings of the 18th International Symposium on Advanced Fluid Information　66-67　2018/11

  15. 誘発地震b値のせん断応力依存性 International-coauthorship

    椋平 祐輔, 伊藤 高敏, Micheal C. Fehler, 浅沼 宏, Markus O. Häring

    日本地震学会2018年度秋季大会講演予稿集　2018/10

  16. Constraining of Focal Mechanisms of Induced Seismicity Using Borehole Logging Information International-coauthorship

    Yusuke Mukuhira, Kazumasa Fuse, Makoto Naoi, Michael Fehler, Takatoshi Ito, Hirokazu Moriya, Hiroshi Asanuma, Markus O. Häring

    Proceedings of the 43rd Stanford GEothermal Workshop　SGP-TR-213　2018/02

  17. Shut-in時の間隙水圧伝播と誘発有感地震発生の因果関係

    椋平祐輔, Carsten Dinske, 浅沼 宏, 伊藤高敏, M. Häring

    日本地熱学会平成29年学術講演会　2017/10

  18. Causality between expansion of seismic cloud and maximum magnitude of induced seismicity in geothermal field International-coauthorship

    Yusuke Mukuhira, Hiroshi Asanuma, Takatoshi Ito, Markus Häring

    Proceedings of EGU General Assembly 2016　2016/04

  19. Migration of Shut-in Pressure and its Effect to Occurrence of the Large Events at Basel Hydraulic Stimulation International-coauthorship

    Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    Proceedings of the 41st Stanford Geothermal Workshop　SGP-TR-209　2016/02

  20. Slip-able area」の概念に基づく水圧刺激時の誘発地震リスクアセスメント法の提案

    椋平祐輔, 浅沼 宏, 伊藤高敏, M. Häring

    日本地熱学会平成27年学術講演会　2015/10

  21. Progress in Understanding the Physics of Large Induced Seismicity at Basel, Switzerland

    Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    Proceedings of World Geothermal Congress 2015　2015/04

  22. New seismic risk assessment: evaluation of the cumulative fault area under critical state based on microseimic information

    Y. Mukuhira, H. Asanuma, M. Häring, T. Ito

    Proceedings of First Schatzalp Workshop on Induced Seismicity　2015/03

  23. Report of WGC2015(Part 2)

    Journal of the Geothermal Research Society of Japan　37　(4)　153-176　2015

    Publisher: THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

    DOI： 10.11367/grsj.37.153 　

    ISSN： 0388-6735

  24. Report of WGC2015(Part 1)

    Journal of the Geothermal Research Society of Japan　37　(3)　101-117　2015

    Publisher: THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN

    DOI： 10.11367/grsj.37.101 　

    ISSN： 0388-6735

Show all ︎Show first 5

Presentations 145

  1. スラリーによる流路閉塞現象に関する実験的研究

    金子寛仁, 椋平祐輔, 渡邉則昭, 田村諒太, 野々山貴行, 大島逸平, 石原真吾, 久志本築, 加納純也, 伊藤高敏

    石油技術協会 令和7年度春季講演会　2025/06/12

  2. Introduction of continuous AE measurement system to laboratory experiments using a sub-meter scale specimen International-presentation

    Japan Geoscience Union Meeting 2025　2025/05/28

  3. せん断増粘流体による岩石の多方向水圧破砕のDEMシミュレーション International-presentation

    和田 琉, 椋平 祐輔, 石原 真吾, 渡邉 則昭, 伊藤 高敏

    日本地球惑星科学連合2025年大会　2025/05/27

  4. Acoustic measurement of viscosity change in functional fluid International-presentation

    Japan Geoscience Union Meeting 2025　2025/05/28

  5. Basel地熱地帯における誘発地震の地震パラメタ推定

    吉光奈奈, 椋平祐輔, 浅沼宏

    地震研究所共同利用研究集会（2024-W-08）「大気・海洋・固体地球の波形解剖学：新たな海陸高密度観測に基づく高分解能イメージングと震源過程解析」　2024/12/23

  6. STF as a Potential Buffer for Induced Seismicity Mitigation

    Lu Wang, Yusuke Mukuhira, Yasuo Yabe, Sando Sawa, Jun Muto

    American Geophysical Union 24 Annual Meeting (AGU24)　2024/12/10

  7. CO2 and water injection-induced shear-slip of fracture in volcanic rock under geothermal environment

    Y. Mukuhira, K. Sueyoshi, E. Pramudyo, K. Miyazaki, K. Sakaguchi, S. Ogata, K. Osato, A. Terai, N. Watanabe

    The 13th Early Career Researchers Ensemble Workshop, TOHOKU UNIV　2024/12/11

  8. STF as a Potential Buffer for Induced Seismicity Mitigation

    Lu Wang, Sando Sawa, Yusuke Mukuhira

    The 13th Early Career Researchers Ensemble Workshop, TOHOKU UNIV　2024/12/11

  9. Double-difference法に基づいたタイムラプス地震波速度・減衰トモグラフィによる流体挙 動の評価: 奥会津地熱地域での涵養注水試験への適用事例

    岡本 京祐, 青栁 直樹, 椋平 祐輔, 浅沼 宏

    日本地熱学会令和6年学術講演会(東京大会)　2024/11/26

  10. 坑井への注水における貯留層挙動の評価: 鉛川地域および城ヶ倉地域を例に

    石橋 琢也, 岡本 京祐, 渡邉 教弘, 鈴木 陽大, 浅沼 宏, 椋平 祐輔, 木原 尚平

    日本地熱学会令和6年学術講演会(東京大会)　2024/11/26

  11. 鉛川地域および城ヶ倉地域において注水時に発生した微小地震の基本的性状

    椋平 祐輔, Dian Darisma, 石橋 琢也, 岡本 京祐, 渡邉 教弘, 鈴木 陽大, 浅沼 宏, 木原 尚平

    日本地熱学会令和6年学術講演会(東京大会)　2024/11/26

  12. Combined In situ & Ex situ, Multi-scale Stress Measurements in Crystalline Geothermal Reservoirs

    Yusuke Mukuhira, Xiaodong Ma, Shihuai Zhang, Takatoshi Ito

    Twenty-first International Conference on Flow Dynamics　2024/11/19

  13. Temporal variations in seismic velocity and attenuation structure in response to a water recharge test in the Okuaizu geothermal field, Fukushima, Japan

    Kyosuke Okamoto, Naoki Aoyagi, Yusuke Mukuhira, Dian Darisma, Hiroshi Asanuma

    The 4th International Conference on Coupled Processes in Fractured Geological Media: Observation, Modeling and Application (Coufrac)　2024/11/13

  14. Basic Study on the Control of the Fluid Flow with Functional Fluid

    Yusuke Mukuhira, Tongfei Tian, Shingo Ishihara, Takaaki Tomai, Yuko Arai, Masaoki Uno, Rongchang Zhang, Lu Wang, Takatoshi Ito

    The 4th International Conference on Coupled Processes in Fractured Geological Media: Observation, Modeling and Application (Coufrac)　2024/11/13

  15. Dynamic tensile behavior of hollow rocks under pre-tension condition

    Lu Wang, Yusuke Mukuhira

    The 4th International Conference on Coupled Processes in Fractured Geological Media: Observation, Modeling and Application (Coufrac)　2024/11/13

  16. Multidirectional fracturing of rock using shear thickening fluid

    Kouta Tokutake, Kazumasa Sueyoshi, Yusuke Mukuhira, Masaoki Uno, Noriaki Watanabe

    The 4th International Conference on Coupled Processes in Fractured Geological Media: Observation, Modeling and Application (Coufrac)　2024/11/13

  17. Single-station multi-phase detection and hypocenter inversion using polarization analysis International-presentation

    Jingyi Sun, Nori Nakata, Yusuke Mukuhira, Takatoshi Ito

    International Joint Workshop on Slow-to-Fast Earthquakes 2024　2024/09/18

  18. Characterizing Fracture Networks Using Microseismic Data Analysis at the Okuaizu Geothermal Field International-presentation

    Dian Darisma, Yusuke Mukuhira, Kyosuke Okamoto, Naoki Aoyogi, Takahiko Uchide, Takuya Ishibashi, Hiroshi Asanuma, Takatoshi Ito

    International Joint Workshop on Slow-to-Fast Earthquakes 2024　2024/09/17

  19. Discussion on the causality of fluid for the series of earthquakes in Noto peninsula International-presentation

    Yusuke Mukuhira, Takaaki Kawahito, Keisuke Yoshida, Masaoki Uno, Takatoshi Ito

    International Joint Workshop on Slow-to-Fast Earthquakes 2024　2024/09/18

  20. 圧力・温度自動応答スマート流体による資源開発革命

    椋平祐輔

    JST創発的研究支援事業 自発的融合の場 「破壊の先を考える 第2回」　2024/08/06

  21. Effect of shear thickening fluid on the hydraulic fracturing behavior International-presentation International-coauthorship

    Yusuke Mukuhira, Watanabe, Noriaki, Sueyoshi, Kazumasa, Takuma, Kohei, Zhang, Rongchang, Tomai, Takaaki, Arai, Yuko, Uno, Masaoki, Ito, Takatoshi, Goto , Ryota, Tongfei, Tian, Sokolovski, Vladimir, Naoi, Makoto

    58th US Rock Mechanics / Geomechanics Symposium　2024/06/24

  22. せん断増粘流体の圧入による花崗岩の多方向破砕

    徳竹 康太, 末吉 和公, 椋平 祐輔, 宇野 正起, 渡邉 則昭

    2024(令和6)年度 資源・素材学会 東北支部 春季大会　2024/06/14

  23. Double-difference法に基づいた地震波速度と減衰構造の推定：奥会津地熱地域での涵養注水試験への適用事例

    岡本 京祐, 青栁 直樹, 椋平 祐輔, Dian Darisma, 浅沼 宏

    公益社団法人物理探査学会 第150回(2024年春季)学術講演会　2024/06/05

  24. せん断増粘流体を用いた岩石破砕の個別要素法によるシミュレーションに関する研究

    和田 琉, 椋平 祐輔, 石原 真吾, 渡邉 則昭, 伊藤 高敏

    令和6年度石油技術協会春季講演会　2024/06/05

  25. 能登半島における一連の地震活動への流体の因果関係についての考察

    川人 崇央, 椋平 祐輔, 吉田 圭佑, 宇野 正起, 伊藤 高敏

    日本地球惑星科学連合2024年大会　2024/05/28

  26. Microseismic Data Analysis for Characterizing the Fracture Network System: A Case Study of the Okuaizu Geothermal Field

    Dian Darisma, Yusuke Mukuhira, Kyosuke Okamoto, Naoki Aoyagi, Takahiko Uchide, Takuya Ishibashi, Hiroshi Asanuma, Takatoshi Ito

    日本地球惑星科学連合2024年大会　2024/05/26

  27. せん断増粘流体による岩石の多方向水圧破砕 Invited

    椋平 祐輔, 後藤 遼太, 渡邉 則昭, 末吉 和公, 詫間 康平, Rongchang Zhang, 直井 誠, Tongfei Tian, Vladimir Vladimir, 笘居 高明, 新井 裕, 子, 宇野 正起, 伊藤 高敏

    日本地球惑星科学連合2024年大会　2024/05/27

  28. 奥会津地熱地域における涵養注水試験に伴う地震波速度と減 衰構造の変化

    岡本 京祐, 青栁 直樹, 椋平 祐輔, Darisma Dian, 浅沼 宏

    日本地球惑星科学連合2024年大会　2024/05/28

  29. Various field data applications of cSPM analysis for comprehensive evaluation of 3D particle motion

    椋平 祐輔, 永田 貴之, Sun Jingyi, 森谷 祐一, 椎名 高裕, Fehler Michael, Nakata Nori, 伊藤 高敏, 野々村 拓

    日本地球惑星科学連合2024年大会　2024/05/27

  30. From DSeis to PROTEA - Probing the heart of an earthquake, especially the interaction between metasedimentary rocks and mantle-derived intrusions Invited

    Hiroshi Ogasawara, Yasuo Yabe, Raymond Durrheim, Musa Manzi, Thomas Kief, Devan Nisson, Julio Castillo, Alba Gómez-Arias, Bennie Liebenberg, Team DSeis, PROTEA

    EGU2024

  31. Machine learning multivariate analysis for injection-induced seismicity risk evaluation

    Yusuke Mukuhira

    GEoREST Workshop　2024/03/11

  32. Revisiting pore pressure behavior at the shut-in phase and causality of large induced seismicity at Basel, Switzerland Invited

    Yusuke Mukuhira

    GEoREST Workshop　2024/03/11

  33. 圧力・温度自動応答スマート流体による資源開発革命

    椋平祐輔

    JST 創発自発的な融合の場 第 2 回 動く・流れるソフトマテリアル研究会 in 仙台　2023/12/18

  34. Experimental Evidence and Numerical Modeling of Velocity-Dependent Rate-and-State Friction Parameters International-presentation International-coauthorship

    Lu Wang, Yusuke Mukuhira, Cheng Mei

    AGU23　2023/12/13

  35. Slab-derived fluid storage in the crust elucidated by earthquake swarm International-presentation

    Yusuke Mukuhira, Masaoki Uno, Keisuke Yoshida

    AGU23　2023/12/12

  36. Scaling Microseismic Cloud Shape during Hydraulic Stimulation using In-situ Stress and Permeability International-presentation International-coauthorship

    Yusuke Mukuhira, Meihua Yang, Takuya Ishibashi, Kyosuke Okamoto, Hirokazu Moriya, Yusuke Kumano, Hiroshi Asanuma, Serge Alexander Shapiro, Justin L Rubinstein, Takatoshi Ito, Kangnan Yan, Yinhui Zuo

    AGU23　2023/12/15

  37. Low SNR events detection of P-S travel time and hypocenter location using polarization International-presentation International-coauthorship

    Jingyi Sun, Yusuke Mukuhira, Takayuki Nagata, Taku Nonomura, Michael C Fehler, Hirokazu Moriya, Nori Nakata, Takatoshi Ito

    AGU23　2023/12/15

  38. 誘発地震リスク評価のための機械学習を用いた多変量解析

    椋平祐輔, 鎌田裕亮, 熊野裕介, 岡本京祐, 石橋琢也, 浅沼宏

    日本地熱学会令和5年学術講演会　2023/11/14

  39. 地熱地域の地震観測網を対象とした深層学習によるイベント読み取りと貯留層構造の詳細把握

    岡本京祐, 椋平祐輔, 浅沼宏, 森谷祐一

    日本地熱学会令和5年学術講演会　2023/11/14

  40. Direct Comparison between Resolved Shear Stress and Stress Drop International-presentation

    N. Yoshimitsu, Y. Mukuhira, H. Asanuma

    The 23rd International Symposium on Advanced Fluid Information　2023/11/06

  41. Acoustic Measurement on Basic Physical Properties of Functional Fluids for Innovative Underground Development International-presentation

    K. Sawayama, Y. Mukuhira, Z. Rongchang, T. Ito

    The 23rd International Symposium on Advanced Fluid Information　2023/11/06

  42. Introduction of New AE Monitoring System for Big-data AI-aided Acoustic Emission Analysis International-presentation

    Y. Mukuhira, M. Naoi, T. Ito

    The 23rd International Symposium on Advanced Fluid Information　2023/11/06

  43. Experimental Investigation on the Flow State of Shear Thickening Fluid in a Circular Channel International-presentation

    R. Zhang, Y. Mukuhira, S. Ishihara, T. Tian, Y. Arai, M. Uno, V. Sokolovski, T. Tomai, T. Ito

    Twentieth International Conference on Flow Dynamics　2023/11/08

  44. Basel地熱地帯における誘発地震データとその地震パラメタの評価

    吉光奈奈, 椋平祐輔, 浅沼宏

    日本地震学会 2023 年度秋季大会　2023/10/31

  45. Scaling Microseismic Cloud Shape during Hydraulic Stimulation using In-situ Stress and Permeability International-presentation International-coauthorship

    Y. Mukuhira, M. Yang, T. Ishibashi, K. Okamoto, H. Moriya, Y. Kumano, H. Asanuma, S. A. Shapiro, J. L. Rubinstein, T. Ito, K. Yan, Y. Zuo

    International Joint Workshop on Slow-to-Fast Earthquakes 2023　2023/09/13

  46. Slab-derived fluid storage in the crust elucidated by earthquake swarm International-presentation

    Yusuke Mukuhira, Masaoki Uno, Keisuke Yoshida

    Water-Rock Interaction (WRI-17)　2023/08/22

  47. Microseismicity analysis in the Okuaizu geothermal field, Japan International-presentation

    Dian Darisma, Yusuke Mukuhira, Naoki Aoyogi, Kyosuke Okamoto, Takuya Ishibashi, Hiroshi Asanuma, Takatoshi Ito

    Water-Rock Interaction (WRI-17)　2023/08/21

  48. Machine learning multivariate analysis for injection-induced seismicity risk evaluation International-presentation

    鎌田裕亮, 椋平祐輔, 熊野裕介, 岡本京祐, 石橋琢也, 浅沼宏

    JpGU Meeting 2023　2023/05/21

  49. Slab-derived fluid storage in the crust elucidated by earthquake swarm International-presentation Invited

    椋平祐輔, 宇野正起, 吉田圭佑

    JpGU Meeting 2023　2023/05/21

  50. 複素スペクトル行列の固有値分解に基づく偏波解析と低SN 比イベント検出への適用 International-presentation

    永田貴之, 椋平祐輔, 孫静怡, 森谷祐一, 野々村拓

    JpGU Meeting 2023　2023/05/22

  51. Detection of P-S travel time and location for Low SNR Event using polarization International-presentation

    J. Sun, Y. Mukuhira, T. Nagata, T. Nonomura, H. Moriya, T. Ito

    JpGU Meeting 2023　2023/05/24

  52. Fracture mapping using microseismic data analysis at Okuaizu Geothermal Field International-presentation

    D. Darisma, Y. Mukuhira, N. Aoyagi, K. Okamoto, T. Ishibashi, H. Asanuma, T. Ito

    JpGU Meeting 2023　2023/05/23

  53. Slab-derived fluid storage in the crust elucidated by earthquake swarm Invited

    椋平祐輔

    第10回東北大学若手アンサンブルワークショップ　2023/05/12

  54. Scaling Microseismic Cloud Shape during Hydraulic Stimulation using Permeability and In-situ Stress Invited

    Yusuke Mukuhira

    Talks related to geothermal reservoirs (Basel stimulation) and geomechanics (core-based stress measurement)　2023/04/03

  55. Slab-derived fluid storage in the crust elucidated by earthquake swarm Invited

    椋平祐輔

    「地震活動の物理」2022年度 研究集会　2023/03/22

  56. Building the Fracture Network Model for Okuaizu Geothermal Field Based on Microseismic Data Analysis International-presentation

    Dian Darisma, Yusuke Mukuhira, Naoki Aoyagi, Kyosuke Okamoto, Takuya Ishibashi, Hiroshi Asanuma, Takatoshi Ito

    Stanford Geothermal Workshop 2023　2023/02/08

  57. Permeability Enhancement Process by Shear Slip on Existing Fractures from the Microseismic Perspective International-presentation

    Yusuke Mukuhira, Takuya Ishibashi, Takatoshi Ito, Hiroshi Asanuma

    Stanford Geothermal Workshop 2023　2023/02/07

  58. Machine learning multivariate analysis for injection induced seismicity risk evaluation International-presentation

    Yusuke Mukuhira, Yusuke Kamada, Yusuke Kumano, Kyosuke Okamoto, Takuya Ishibashi, Yusuke Kumano, Hiroshi Asanuma

    Grand Renewable Energy 2022 International Conference　2022/12/14

  59. On the permeability enhancement perpendicular to the shear slip direction from the microseismic perspective International-presentation

    Yusuke Mukuhira

    CouFrac 2022　2022/11/14

  60. 微小地震，岩石力学的視点からのせん断滑りによる透水性改善評価

    椋平祐輔, 伊藤高敏, 石橋琢也, 浅沼宏

    日本地熱学会令和4年学術講演会　2022/11/08

  61. 石川県能登半島北東部の群発地震：マグマ活動に起因する構造と流体供給

    吉田圭佑, 宇野正起, 松澤暢, 行竹洋平, 椋平祐輔, 佐藤比呂志, 吉田武義

    日本地震学会2022年度秋季大会　2022/10/25

  62. P-S travel time of low SNR events using polarization detection International-presentation

    J. Sun, Y. Mukuhira, T. Nagata, T. Nonomura, H. Moriya, T. Ito

    International Joint Workshop on Slow to-Fast Earthquakes 2022　2022/09/14

  63. P-S travel time detection of low SNR induced seismicity based on time-domain particle motion analysis International-presentation

    J. Sun, Y. Mukuhira, T. Nagata, T. Nonomura, H. Moriya, T.Ito

    The 4th lnternational Conference on Rock Dynamics and Applications　2022/08/19

  64. Detection of P-S travel time for Low SNR Event using polarization International-presentation

    J. Sun, Y. Mukuhira, T. Nagata, T. Nonomura, H. Moriya, T. Ito

    JpGU Meeting 2022　2022/05/29

  65. 圧力・温度自動応答スマート流体による資源開発革命

    椋平祐輔

    「融合の場」第１回公開シンポジウム（東北地区）　2022/06/02

  66. 地殻応力にスケールされる微小地震クラウドの成長過程 International-coauthorship

    椋平祐輔, 伊藤高敏, 岡本京祐, 石橋琢也, 浅沼宏, 熊野裕介, 森谷祐一, Meihua Yang, Kangnan Yan, Yunhei Zuo, Justin Rubinstein, Markus O. Häring

    日本地熱学会令和3年学術講演会　2021/10/28

  67. 注水によるせん断すべり挙動解明のための実験的研究

    青木晃司, 椋平祐輔, 伊藤 高敏

    日本地熱学会令和3年学術講演会　2021/10/27

  68. 地熱地域の地震観測網を対象とした深層学習によるP，S波の自動読み取り International-coauthorship

    岡本京祐, 椋平祐輔, 浅沼宏, Häring Markus

    日本地熱学会令和3年学術講演会　2021/10/27

  69. Application of core-based inversion to reconstruct stress field in an underground geoscience laboratory International-presentation International-coauthorship

    X. Ma, Y. Mukuhira, T. Ito

    Proc. the 21st International Symposium on Advanced Fluid Information　2021/10/28

  70. Understanding failure phenomena accelerated by machine learning for subsurface energy development International-presentation

    K. Aoki, Y. Mukuhira, M. Naoi, T. Ito

    Proc. the 21st International Symposium on Advanced Fluid Information　2021/10/28

  71. Detection of S-wave Arrival of Low SNR Event using Polarization International-presentation

    S. Jingyi, Y. Mukuhira, N. Nakata

    Proc. the 21st International Symposium on Advanced Fluid Information　2021/10/28

  72. Extension of low-SNR coherent signal detection method based on spectral matrix analysis by using wavelet transformation and time delay coordinate International-presentation

    Takayuki Nagata, Yusuke Mukuhira, Taku Nonomura

    Proc. the 14th SEGJ International Symposium　2021/10/19

  73. Development of microseismic monitoring system using deep learning P- and S-waves picker in geothermal fields International-presentation International-coauthorship

    Kyosuke Okamoto, Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    Proc. the 14th SEGJ International Symposium　2021/10/19

  74. Detection of P-S travel time for Low SNR Event by particle motion analysis International-presentation

    Sun Jingyi, Yusuke Mukuhira, Takayuki Nagata, Taku Nonomura, Hirokazu Moriya, Takatoshi Ito

    Proc. the 14th SEGJ International Symposium　2021/10/19

  75. スペクトル行列解析を用いた低SNR地震動検出手法の時間遅延座標による拡張

    永田貴之, 椋平祐輔, 野々村拓

    2021年度統計関連学会連合大会　2021/09/09

  76. AEによる注水モニタリング：実験室から地熱フィールドまで Invited

    椋平祐輔

    2021年度第1回アコースティック・エミッション部門講演会　2021/08/31

  77. Characteristic of Pore Pressure Migration Clarified by Multidisciplinary Microseismic Analysis International-presentation International-coauthorship

    Yusuke Mukuhira, Takatoshi Ito, Hirokazu Moriya, Hiroshi Asanuma, Markus Häring

    WGC2020+1　2021/07/06

  78. Microseismic Cloud Growth Process Mainly Controlled by In-Situ Stress During Hydraulic Stimulation International-presentation International-coauthorship

    Yusuke Mukuhira, Meihua Yang, Kyosuke Okamoto, Takuya Ishibashi, Yusuke Kumano, Hirokazu Moriya, Hiroshi Asanuma, Kangnan Yan, Justin Rubinstein, Yinhui Zuo, Markus O Häring

    JpGU Meeting 2021　2021/06/04

  79. Induced Earthquakes Before and After Cessation of Longterm Injections in Rongchang Gas Field, Sichuan, China International-presentation International-coauthorship

    Zhiwei Wang, Xinglin Lei, Jinrong Su, Shengli Ma, Yusuke Mukuhira

    JpGU Meeting 2021　2021/06/03

  80. Automatic hypocenter determination by deep learning for microseismic networks in geothermal areas International-presentation International-coauthorship

    Kyosuke Okamoto, Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    JpGU Meeting 2021　2021/06/03

  81. Inverse analysis of seismic swarm induced by slab-derived fluids International-presentation

    Yusuke Mukuhira, Masaoki Uno, Keisuke Yoshida

    JpGU Meeting 2021　2021/06/04

  82. Experimental study on fluid injection-induced fault slip International-presentation

    Koji Aoki, Yusuke Mukuhira, Takatoshi Ito

    JpGU Meeting 2021　2021/06/04

  83. 既存き裂情報と岩石力学情報から推定する誘発地震活動 International-coauthorship

    椋平祐輔, Martin Ziegler, 伊藤高敏, 浅沼宏, Markus O. Häring

    第15回岩の力学国内シンポジウム　2021/01/14

  84. The physics of induced seismicity discovered by geomechanics and microseismic analysis International-presentation Invited

    Yusuke Mukuhira

    CouFrac 2020　2020/11/13

  85. 主応力比情報を用いた微小地震の断層面解範囲絞り込み International-coauthorship

    椋平 祐輔, 伊藤 高敏, 浅沼 宏, Markus O. Häring

    日本地熱学会令和2 年学術講演会　2020/11/11

  86. Low-SNR Microseismic Detection Using Direct P-Wave Arrival Polarization International-coauthorship

    椋平 祐輔, Oleg Poliannikov, Michael Fehler, 森谷 祐一

    日本地震学会2020年度秋季大会　2020/10/31

  87. 地殻応力情報を用いた微小地震の断層面解限定 International-coauthorship

    椋平 祐輔, 直井 誠, 森谷 祐一, 伊藤 高敏, 浅沼 宏, Markus O. Haring

    令和2年度石油技術協会学術大会　2020/10

  88. Case Studies on Worldwide Fluid-Induced Seismicity in Geothermal and Oil/Gas Field International-presentation

    Yusuke Kumano, Kazuhiko Tezuka, Hiroshi Asanuma, Takuya Ishibashi, Kyosuke Okamoto, Katsuya Kiyono, Yusuke Mukuhira

    The Seventeenth International Conference on Flow Dynamics　2020/10/28

  89. First Application Result of DCDA Method to the Rock Core Samples from Underground Geoscience Laboratory International-presentation International-coauthorship

    Xiaodong Ma, Yusuke Mukuhira, Takatoshi Ito

    The 20th International Symposium on Advanced Fluid Information　2020/10/29

  90. Detection of S-wave Arrival of Low SNR Event using Polarization International-presentation International-coauthorship

    Sun Jingyi, Yusuke Mukuhira, Norimitsu Nakata, Michael Fehler

    The 20th International Symposium on Advanced Fluid Information　2020/10/29

  91. Estimation of Focal Mechanisms of Large Number of Induced Seismicity to Understand Fracture System in the Geothermal Reservoir International-presentation International-coauthorship

    Kangnan Yan, Yusuke Mukuhira, Rubinstein Justin, Norbeck Jack

    The 20th International Symposium on Advanced Fluid Information　2020/10/29

  92. Estimation of focal mechanisms of large number of induced seismicity to understand fracture system in the geothermal reservoir International-presentation International-coauthorship

    Kangnan Yan, Yusuke Mukuhira, Takatoshi Ito, Yinhui Zuo, Hiroshi Asanuma, Markus O Häring

    JpGU-AGU Joint Meeting 2020　2020/07

  93. Investigation of the physical link between the injection induced seismicity and information from borehole logging International-presentation International-coauthorship

    JpGU-AGU Joint Meeting 2020　2020/07

  94. Singular Behavior and Its Control of Hydraulic Fracture in Sands Verified in Laboratory Experiments with Aid of CT Scanner International-presentation

    Takatoshi Ito, Hyuga Yoshida, Yusuke Mukuhira, Koji Yamamoto, Yoshihiro Tsuchiya

    AGU Fall Meeting 2019　2019/12/09

  95. Understanding of the physics of induced seismicity from natural fracture and in-situstress information from borehole logging International-presentation International-coauthorship

    Yusuke Mukuhira, Martin Ziegler, Takatoshi Ito

    AGU Fall Meeting 2019　2019/12/09

  96. Comparative Study of Low-magnitude Earthquake Detection Techniques for Use with Dense Seismic Monitoring Arrays: Applications for Induced Seismicity Monitoring International-presentation International-coauthorship

    Michael C Fehler, Oleg Poliannikov, Yusuke Mukuhira, Paul Wyer, Brian deMartin, Nori Nakata

    AGU Fall Meeting 2019　2019/12/09

  97. Introduction of natural fracture information to induced seismicity analysis International-presentation International-coauthorship

    Yusuke Mukuhira, Martin Ziegler, Takatoshi Ito, Hiroshi Asanuma, Markus O. Häring

    YSRM 2019 & REIF 2019　2019/12/02

  98. Constraint on the Range of the Focal Mechanism of Microseismicity by the Usage of In-situ Stress Information International-coauthorship

    2019/11/22

  99. Simulation Study on Mechanism of Fault Slip Induced by Fluid Injection

    2019/11/22

  100. Link Between Tracer and Microseismic Analysis to Comprehensive Understanding of Hydraulic Feature of Fractured Geothermal Reservoir International-presentation International-coauthorship

    A. Suzuki, Y. Mukuhira, R. N. Horne, A. Abe, A. J. Howkins, T. Ishibashi, P. K. Kang

    ICFD2019　2019/11/07

  101. Validation of Fracture Permeability Estimated by Integrated Approach of Microseismic Observations and Reservoir Engineering Modeling International-presentation International-coauthorship

    M. Yang, Y. Mukuhira, J. H. Norbeck, J. L. Rubinstein

    ICFD2019　2019/11/07

  102. Application of Core-based Inversion to Reconstruct Stress Field in an Underground Geoscience Laboratory International-presentation International-coauthorship

    X. Ma, Y. Mukuhira, T. Ito

    ICFD2019　2019/11/07

  103. In-situ stress constraints on the focal mechanisms of induced seismicity International-presentation International-coauthorship

    Y. Mukuhira, T. Ito, M.C. Fehler, M. Naoi, H. Moriya, H. Asanuma, M. O. Häring

    ISRM2019　2019/09/16

  104. 地下の逆問題解決に対するチート的アプローチ

    椋平 祐輔

    第5回東北大学若手研究者アンサンブルWS　2019/06/07

  105. ICDP DSeis 4: Drilling, core logging, and in-hole geophysical logging of ICDP DSeis drilling into the M5.5 aftershock zones in a South African gold mines. International-presentation International-coauthorship

    Shunsuke YOSHIDA, Tadokoro Ryogo, Kosuke Sugimura, Kanematsu Makoto, Mitsuya Higashi, Benni Liebenberg, Esterhuizen van Heerden, Stephen Tau, Siyanda Mngadi, Ray Durrheim, Martin Ziegler, Yusuke Mukuhira, Ronald Conze, Yasuo Yabe, Shunya Kaneki, Yuki Yokoyama, Nomqhele Nkosi, Dave Roberts, Sifiso Bucci, Hiroshi Ogasawara

    JpGU meeting 2019　2019/05/27

  106. A Novel Method to Estimate Fracture Permeability: Combining microseismic observational data and reservoir engineering model International-presentation

    Meihua Yang, Yusuke Mukuhira, Takatoshi Ito

    JpGU meeting 2019　2019/05/26

  107. Constraint of focal mechanisms of induced seismicity by using misfit angles based on known in-situ stress International-presentation International-coauthorship

    Yusuke Mukuhira, Makoto Naoi, Michael C Fehler, Hirokazu Moriya, Takatoshi Ito, Hiroshi Asanuma, Markus O Häring

    JpGU meeting 2019　2019/05/26

  108. Causality between induced seismicity b-value reduction and stress state of existing fractures International-presentation International-coauthorship Invited

    Yusuke Mukuhira, Michael C Fehler, Takatoshi Ito, Hiroshi Asanuma, Markus O Häring

    JpGU meeting 2019　2019/05/26

  109. 坑井を通した人工注水によってき裂が発生する弾性波を用いた地下深部き裂構造の評価 Invited

    椋平 祐輔

    第22回 表面探傷シンポジウム 「表面探傷技術による健全性診断，品質検査」　2019/03/18

  110. Constraining of Focal Mechanisms of Induced Seismicity Using Borehole Logging Information

    MUKUHIRA Yusuke

    Special Seminar at ETH-Zurich　2019/03/11

  111. Dependency of the induced seismicity b-value on the stress state of existing fractures. International-presentation

    MUKUHIRA Yusuke

    Third Schatzalp Workshop on Induced Seismicity　2019/03/07

  112. 誘発地震の岩石力学的解析から見えたb値のせん断応力依存性 Invited

    椋平 祐輔

    研究集会「地震活動の物理」　2019/02/05

  113. Constraint of focal mechanisms of induced seismicity by analyzing consistency of slip vector using in-situ stress International-presentation

    MUKUHIRA Yusuke

    AGU Fall meeting 2018　2018/12/11

  114. き裂システムに対する注水時の間隙水圧伝播

    椋平 祐輔, 森谷 祐一, 伊藤 高敏, 浅沼 宏, Markus O. Häring

    日本地熱学会平成30年学術講演会　2018/11/16

  115. Introduction of in-situ stress information from borehole logging to source characterization of microseismic events International-presentation International-coauthorship

    Yusuke Mukuhira, Kazumasa Fuse, Makoto Naoi, Takatoshi Ito, Michael C. Fehler, Hirokazu Moriya, Hiroshi Asanuma, Markus O. Häring

    SEGJ2018 International Symposium　2018/11/12

  116. Estimation of Fracture Permeability by Integrating Microseismic Observational data and reservoir engineering modeling International-presentation

    MUKUHIRA Yusuke

    International Conference on Flow Dynamics　2018/11/08

  117. Dependency of the injection induced seismicity b-value on the stress state of existing fractures International-presentation

    MUKUHIRA Yusuke

    International Induced Seismicity Workshop at Banff,　2018/10/24

  118. Dependency of the injection induced seismicity b-value on the stress state of existing fractures

    MUKUHIRA Yusuke

    Brown Bag Seminars at Caltech Seismolab　2018/10/22

  119. Low S/N seismicity detection using features of 3D particle motions of direct P-waves International-presentation

    MUKUHIRA Yusuke

    SEG Annual Meeting 2018　2018/10/15

  120. 誘発地震 b 値のせん断応力依存性

    椋平 祐輔, 伊藤 高敏, Michael C. Fehler, 浅沼 宏, Markus O. Häring

    日本地震学会2018年度秋季大会　2018/10/10

  121. 注水にともなうAE(誘発微小地震)解析の最前線 Invited

    椋平 祐輔

    第２５回AE研究会　2018/10/01

  122. Development of microseismic analysis method with multidisciplinary geophysical data

    MUKUHIRA Yusuke

    MIT earth resources laboratory annual funding member meeting 2018　2018/05/23

  123. Constraining of Focal Mechanisms of Induced Seismicity Using Borehole Logging Information International-presentation

    MUKUHIRA Yusuke

    Stanford Geothermal Workshop 2018　2018/02/12

  124. Dependency of the injection induced seismicity b-value on the stress state of existing fractures International-presentation

    Y. Mukuhira, M. Fehler, T. Ito, H. Asanuma, M. Häring

    AGU 2017 Fall Meeting　2017/12

  125. Shut-in時の間隙水圧伝播と誘発有感地震発生の因果関係

    椋平祐輔, Carsten Dinske, 浅沼 宏, 伊藤 高敏, M. Häring

    日本地熱学会平成29年学術講演会　2017/10/20

  126. Buried microseismic detection from continuous data using spectral matrix analysis of triaxial particle motion International-presentation

    Yusuke Mukuhira, Michael Fehler, Moriya Hirokazu

    SEG 2017 Annual Meeting　2017/09/26

  127. Propagation speed of pore pressure throughout permeable fracture during hydraulic stimulation International-presentation

    Y. Mukuhira, H. Moriya, T. Ito, H. Asanuma, M. Häring

    AGU 2016 Fall Meeting　2016/12

  128. Stress state analysis of a fault plane with large induced seismicity International-presentation

    Y. Mukuhira, T. Ito, H. Asanuma, M. Haring

    50th US Rock Mechanics / Geomechanics Symposium 2016　2016/06

  129. Causality between expansion of seismic cloud and maximum magnitude of induced seismicity in geothermal field International-presentation International-coauthorship

    Yusuke Mukuhira, Hiroshi Asanuma, Takatoshi Ito, Markus Häring

    EGU General Assembly 2016　2016/04/18

  130. Migration of Shut-in Pressure and its Effect to Occurrence of the Large Events at Basel Hydraulic Stimulation International-presentation International-coauthorship

    Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    The 41st Stanford Geothermal Workshop　2016/02

  131. Evaluation of the stress state on the fault plane and its bond to the magnitude of seismic events Invited

    Y. Mukuhira, H. Asanuma, T. Ito, M. Häring

    ICDP WORKSHOP: DRILLING SEISMOLOGIC ZONES IN DEEP SOUTH AFRICAN GOLD　2015

  132. 「Slip-able area」の概念に基づく水圧刺激時の誘発地震リスクアセスメント法の提案

    椋平 祐輔, 浅沼 宏, 伊藤 高敏

    日本地熱学会平成27年学術講演会　2015/10/22

  133. 地下開発により増加する誘発地震リスク

    椋平 祐輔

    東北大学附属研究所 研究所若手アンサンブルワークショップ　2015/07/23

  134. Progress in Understanding the Physics of Large Induced Seismicity at Basel, Switzerland International-presentation

    Yusuke Mukuhira, Hiroshi Asanuma, Markus Häring

    World Geothermal Congress 2015　2015/04

  135. New seismic risk assessment: evaluation of the cumulative fault area under critical state based on microseimic information International-presentation

    Y. Mukuhira, H. Asanuma, M. Häring, T. Ito

    First Schatzalp Workshop on Induced Seismicity　2015/03

  136. Estimation of the Cumulative Fault Area Under Critical State Based on Microseismic Dataset at Hydraulic Stimulation for Seismic Risk Assessment International-presentation

    Y. Mukuhira, H. Asanuma, M. Häring, T. Ito

    AGU 2014 Fall Meeting　2014/12

  137. Study on trigger mechanism of large induced seismicity at a hydraulic stimulation in Basel, Switzerland International-presentation

    Y. Mukuhira, H. Asanuma, M. Häring

    SEGJ Symposium 2013　2013/11/20

  138. Seismostatical modeling of earthquakes from geothermal fields International-presentation

    T. Eto, H. Asanuma, M. Adachi, K. Saeki, K. Aoyama, H. Ozeki, Y. Mukuhira

    RS2013　2013/08/20

  139. Geomechanical interpretation of induced seismicity observed at Basel geothermal reservoir International-presentation

    Y. Mukuhira, H. Asanuma, M. Häring

    RS2013　2013/08/20

  140. Characteristics of large seismic events observed during a stimulation of geothermal reservoir at Basel 2006 International-presentation

    Y. Mukuhira, H. Asanuma, H. Niitsuma, M. Häring

    SEGJ Symposium 2011　2011/11/20

  141. Estimation of stimulation process of HDR/EGS reservoirs by analysis of microseismic multiplets

    H.Asanuma, Y. Kumano, Y. Kenmoku, Y. Kawamura, Y. Mukuhira, H. Niitsuma, D. Wyborn, M. Haring

    RE2010　2010/06

  142. Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoirs at Cooper Basin, Australia and Basel, Switzerland

    Y. Mukuhira, H. Asanuma, H. Nozaki, H. Niitsuma, D. Wyborn, M. Häring

    RE2010　2010/06

  143. Analysis of microseismic events with larger magnitude collected at Cooper Basin, Australia and Basel, Switzerland International-presentation

    Y. Mukuhira, H. Asanuma, H. Nozaki, H. Niitsuma, D. Wyborn, M. Häring

    WGC2010　2010/04

  144. Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoir at Basel, Switzerland

    Y. Mukuhira, H. Asanuma, H. Niitsuma, M. H Häring, N. Deichmann

    15th Formation Evaluation Symposium of Japan　2009/10

  145. Discrete element modeling of rock fracturing with shear thickening fluid

    Ryu Wada, Yusuke Mukuhira, Hiroyuki Shimizu, Shingo Ishihara, Noriaki Watanabe, Lu Wang, Takatoshi Ito

    The 4th International Conference on Coupled Processes in Fractured Geological Media: Observation, Modeling and Application (Coufrac)　2024/11/13

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Industrial Property Rights 4

  1. 地震の抑制方法

    椋平 祐輔, Wang Lu, 矢部 康男

    Property Type: Patent

  2. 流動制御方法

    椋平祐輔, 石原真吾

    Property Type: Patent

  3. （仮）流体によるき裂閉塞を用いた多方向水圧破砕法

    椋平祐輔, 渡邉則昭, 後藤遼太

    Property Type: Patent

  4. ORIENTING PROCESSING DEVICE, ORIENTING ASSISTANCE METHOD, AND PROGRAM

    Property Type: Patent

Research Projects 15

  1. 地殻応力の支配からの解放：多方向水圧破砕法の開発と破壊様式の確立

    椋平 祐輔

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 基盤研究(B)

    Category: 基盤研究(B)

    Institution: 東北大学

    2023/04/01 - 2028/03/31

  2. 圧力・温度自動応答スマート流体による資源開発革命（フェーズ２）

    Offer Organization: 科学技術振興機構

    System: 創発的研究支援事業

    2024/04 - 2028/03

  3. 間隙水圧とSlow地震の関連性解明のための室内岩石実験の完遂

    椋平 祐輔

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 学術変革領域研究(A)

    Institution: 東北大学

    2024/04 - 2026/03

  4. 資源工学的視点の室内岩石実験による間隙水圧とSlow地震の関連性解明

    椋平 祐輔

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 学術変革領域研究(A)

    Category: 学術変革領域研究(A)

    Institution: 東北大学

    2022/06/16 - 2024/03/31

  5. 圧力・温度自動応答スマート流体による資源開発革命

    Offer Organization: 科学技術振興機構

    System: 創発的研究支援事業

    2021/04 - 2024/03

  6. 坑井検層による地球物理データが導く微小地震き裂面方向逆解析のベイズ統計学的展開

    椋平 祐輔, 吉田 圭佑

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 基盤研究(C)

    Category: 基盤研究(C)

    Institution: 東北大学

    2020/04/01 - 2023/03/31

    More details Close

    本年度は，前年度，研究分担者と本研究で提案する手法に周辺の応用分野や，現象についても議論を深めた結果，有望な本技術の応用先である群発地震に関してより理解を深めることとした。研究分担者が，精力的に研究を行なっている東北地方の群発地震に対して，これまで注水時の誘発地震の解析で蓄積されてきた知識や解析手法を応用することで，群発地震を励起させたと考えられる流体の量を逆推定することができた。 ここでは，群発地震発生領域の時間発展をモデリングし，その進展から求めた水理学的パラメータを用いて，流体の量を逆推定することに成功した。一方で，誘発地震分野でハザード予測に用いられている，流体と地震活動を結びつける法則を用いて群発地震活動から流体量を逆推定した。得られた流体量を地質学的な知見から議論し，蓄積されていた流体量がどれくらいの年月の脱水過程で供給されるかを検討した。 上記は，本来の研究実施計画に必ずしも沿ったものではないが，近年の誘発地震研究分野の蓄積が可能にした大変斬新なアプローチであるため，実施した。 なお，本研究にそったフレームワーク部分も，着実に進捗を重ね，対象フィールドに対してモーメントテンソルインバージョンのコードの書き換え等も終了し，基礎解析を進めている。 ベイズ理論の応用に関しても様々な学会や，論文等からベイズ統計学の地震学分野での実際の応用状況を把握し，実装に向けた知識を蓄積することができた。

  7. 群発地震を通した沈み込み帯流体ダイナミクス理解の空間的展開

    椋平祐輔, 宇野正起, 吉田圭佑, Zhiwei Wang

    Offer Organization: 東北大学

    System: 2022年度若⼿研究者アンサンブルグラント

    2022/04 - 2023/03

  8. 機械学習を用いた地熱地帯の微小地震検出法の開発とスタンダード化

    椋平祐輔, 岡本京祐

    Offer Organization: 東北大学

    System: 令和３年度 東北大学―産総研マッチング研究支援事業

    2021/06 - 2022/03

  9. Expansion of slow slip microearthquake into the field of subsurface fluid energy utilization

    Moriya Hirokazu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2019/06/28 - 2021/03/31

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    The seismic events, which were considered to be slow events, were detected by analyzing continuous waveform data measured in the Groningen gas field. Despite the depth of the earthquake source is thought to be around 3km-5km, events with a time duration around 30 seconds were included. When the source depth is about 3 km, the shear slip of the crack is generally several ms and the time duration of detected waveforms is several seconds general. Therefore, the event detected in this analysis seemed that the shear slip was more slowly than the normal AE. On the other hand, since the velocity structure of the field is composed of relatively low-velocity layers, it was found that detailed examination is required in consideration of such as the Q value.

  10. 群発地震の逆解析による沈み込み帯の流体ダイナミクスの解明

    椋平祐輔, 宇野正起

    Offer Organization: 東北大学

    System: 2020 年度若⼿研究者アンサンブルグラント

    2020/07 - 2021/03

  11. Development of hybrid focal mechanism method by combining borehole logging and microseismic information

    Mukuhira Yusuke

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Early-Career Scientists

    Institution: Tohoku University

    2018/04/01 - 2020/03/31

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    Microseismicity occurs from the shear slip on existing fractures at the sub-surface fluid resource developments such as geothermal development. Existing fractures play a very important role in resource development because they storage the resources and act as flow paths. However, estimating the orientation of existing fractures is difficult due to the limitation of seismological information acquisition from microseismicity. This study utilizes the geophysical information such as in-situ stress and existing fractures both from borehole logging and combined into the seismological analysis process. This attempt successfully constrains the range of the focal mechanism of microseismicity. In other words, the geophysical information from borehole logging compensates for the lack of seismology information in the seismological analysis.

  12. Development of hydraulic fracture evaluation by laboratory experiments and AE analysis

    Naoi Makoto, Moriya Hirokazu, Mukuhira Yusuke

    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: Kyoto University

    2016/04/01 - 2019/03/31

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    We conducted hydraulic fracturing experiments in order to investigate the relationship between hydraulic fractures and induced microearthquakes. We monitored acoustic emissions during the experiments and compared the hypocenter distributions to fluid penetration regions that observed after the experiments. Fluid pressure history, fluid penetration region, acoustic emission activities, and their dominant mechanism significantly depended on the kind of rocks and dominant direction of preexisting fractures, revealing many important points that should be considered when estimating influence regions by microseismic activities.

  13. Development of "Slip-able area" model for risk assessment of induced seismicity

    MUKUHIRA Yusuke, ITO Takatoshi, ASANUMA Hiroshi, Markus Häring

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

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

    Institution: Tohoku University

    2015/04/01 - 2017/03/31

    More details Close

    We have developed a seismic evaluation method called the possible seismic moment (PoSeMo) model to assess the potential seismic moment that could be released in the future based on current seismic activity. The PoSeMo model assumes the existence of a representative parameter that can describe the seismic characteristics of a given field. This parameter is defined as the seismic moment density, which quantifies the seismic moment able to be released per rock volume. The rock volume presumed to be in critical condition because of stimulation is defined as the stimulated rock volume. The current stimulation condition for the PoSeMo model can be estimated from the product of these two parameters. The difference between the output of the PoSeMo model and the observed cumulative seismic moment corresponds to the cumulative seismic moment that could be released in the future. This value can be transformed into the possible maximum magnitude that has clear physical meaning.

  14. 超高温延性領域における地熱開発のための誘発微小地震発生メカニズムの解明

    椋平 祐輔

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東北大学

    2013/04/01 - 2016/03/31

    More details Close

    本研究は，超高温延性領域内における地熱開発時の，誘発微小地震の発生に関して岩石学・地震学の新理論を導出するとともに数値シミュレーション，室内実験等により貯留層内外での地震発生現象の解明を試みる。これにより，超高温延性領域内における能動的地熱開発時の誘発微小地震の発生可能性，発生メカニズム，有感地震発生リスク，微小地震による貯留層モニタリングの可能性を明らかにする事を目的とした。 初年度，誘発微小地震発生に関わる岩石力学・地震学的理論の導出より，超高温延性領域における地熱開発時に発生すると考えられる熱応力を理解することが必要であると考えた。２年目には実験的に，超高温延性領域と同等な条件下で高温の岩体に対して注水実験等を行うことで，熱応力を再現しその現象の解明，破壊への寄与の解明に迫ることとした。そこで，モルタルで作成する模擬岩石内にあらかじめ歪ゲージを埋め込むみ，さらに引っ張りき裂を作成し，模擬既存き裂とすることで，既存き裂を含む模擬岩石試験片を用いる。さらに，高温真三軸試験器を用い，高温・封圧下にある試験片に冷却水を注入し，生じる熱歪みを直接測定しようとする実験機構を考案した。ここで計測される熱歪みから，熱応力は計算できると考えた。最終年度には，実験装置に改造を施し，高温の試験片内の歪みをモニター可能にした。引っ張りき裂を有する試験片を用いて予備実験を何度か行い透水試験を行うことに成功した。しかし，実験装置の改造，実験ノウハウの蓄積に反して，度重なる実験装置の制御系の故障・ヒータ等の基幹となる部品の損傷等によって，本期間内に明らかに有意な実験結果を得ることはできなかった。しかし，これまで蓄積してきた実験ノウハウや環境整備，更には予備実験を始めとする基礎データは，非常に価値があり，本実験の成功まであと一歩ということ所まで達成できたと言える。

  15. 地熱貯留層の水圧刺激時に発生する大マグニチュードAEの発生メカニズムの解明

    椋平 祐輔

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東北大学

    2010 - 2012

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    最終年度までに,大マグニチュードAEの実データ解析を徹底的に行ったことにより,大マグニチュードAEの性状を徐々に明らかにすることに成功してきた。最終年度は,主にこれまでに得てきた大マグニチュードAEに関する観測事実の総合解釈を行い,大マグニチュードAEの発生特性としてまとめるとともに,大マグニチュードAEのトリガメカニズム,マグニチュード支配要因についても検討した。その内容を以下の(A)～(C)にまとめる。 (A)大マグニチュードAEの発生特性 大マグニチュードAEは,発生場所・発生時間により特徴が異なることが明らかになり,それらを深部大マグニチュードAE,浅部大マグニチュードAEと分類できた。これまでの解析から得られた観測事実より,深部大マグニチュードAEと,浅部大マグニチュードAEの発生特性の大部分が明らかになった。 (B)大マグニチュードAEのトリガ Coulombの破壊基準のパラメータのうち,間隙水圧,もしくは応力変化がせん断滑りをトリガしたというモデルを検討した。その結果,Coulombの破壊基準から推定される間隙水圧がほとんどのAEのせん断滑りに対して最も支配的なトリガメカニズムである事がわかった。一方で,拡散過程に従う間隙水圧,先行する誘発微小地震のせん断滑りに起因する応力変化は,AEの支配的なトリガである可能性が低いということもわかった。 (C)AEのマグニチュード支配要因 Coulombの破壊基準のパラメータである間隙水圧,および,き裂に作用する応力が誘発微小地震のマグニチュードを支配要因であるというモデルを検討した。その結果,誘発微小地震のマグニチュードと間隙水圧は直接相関がない一方で,き裂に作用するせん断応力が大きい断層面からマグニチュードが大きい誘発微小地震が発生する傾向が見られ,せん断応力が大きいことが,破壊を進展させ大マグニチュードAEを発生させる1つの条件であると結論付けた。

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Social Activities 1

  1. ボストン日本人研究者交流会 幹事

    2016/12 - 2018/08

Media Coverage 4

  1. 新たな岩石の破砕法で地下資源開発のコスト低減の可能性

    ASCII.jp　ASCII.jp　【JSTnews6月号掲載】NEWS&TOPICS 研究成果／創発的研究支援事業（FOREST）

    2025/06

    Type: Internet

  2. Precise evaluation of seismic particle motions with signal processing technology: Introduction of time-delay components for underground resource development and other applications

    Japan Science and Technology Agency　Science Japan　Latest News

    2024/05/08

    Type: Internet

  3. 信号処理技術で地震動を精密評価 時間遅れ成分を導入、地下資源開発など応用へ

    国立研究開発法人科学技術振興機構　JSTnews　研究成果 創発的研究支援事業

    2024/04

    Type: Internet

  4. 地下資源開発で起こる微小地震をコントロールする

    河合塾　みらいぶっく 学問・大学ナビ

    2024/02

    Type: Internet

Academic Activities 13

  1. IASPEI: S09 Anthropogenic Seismicity

    2025/08/31 - 2025/09/05

    Activity type: Academic society, research group, etc.

  2. Coufrac 2024

    2024/11/13 - 2024/11/15

    Activity type: Academic society, research group, etc.

  3. A‐6: Geophysical Monitoring Session Chair

    2022/11/16 - 2022/11/16

    Activity type: Academic society, research group, etc.

  4. 日本地熱学会 令和３年学術講演会

    2021/10/26 - 2021/10/29

    Activity type: Academic society, research group, etc.

  5. Energy Transition/ Environmental Applications セッションコンビーナ

    2021/10/19 - 2021/10/19

    Activity type: Academic society, research group, etc.

  6. Session Chair person

    2021/06/04 - 2021/06/04

    Activity type: Academic society, research group, etc.

  7. Session Chair; Enhanced Geothermal Systems 9 -- Novel Stimulation Methods

    2021/05/12 - 2021/05/12

    Activity type: Academic society, research group, etc.

  8. 議長

    2020/11/11 - 2020/11/13

    Activity type: Academic society, research group, etc.

  9. Organizer : Fluid and Seismicity

    2020/10/28 - 2020/10/30

    Activity type: Academic society, research group, etc.

  10. Convener : Fluid and Seismicity

    2020/10/28 - 2020/10/30

    Activity type: Academic society, research group, etc.

  11. Sesson Convener: INDUCED AND TRIGGERED SEISMICITY: CASE STUDIES, MONITORING AND MODELING TECHNIQUES

    2020/07/12 - 2020/07/16

    Activity type: Academic society, research group, etc.

  12. 座長

    熊本

    2019/11/20 - 2019/11/20

    Activity type: Academic society, research group, etc.

  13. JST創発的研究支援事業 自発的融合の場 「破壊の先を考える 第2回」

    東北大学片平キャンパス

    2024/08/06 -

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