Quantitative evaluation of frictional heat of the Futagawa fault ruptured during the Kumamoto Mw 7.1 earthquake and investigation of singular temperature structure in the area

• Project/Area Number: 19H00717
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 17:Earth and planetary science and related fields
• Research Institution: Kyoto University
• Principal Investigator: Lin Weiren 京都大学, 工学研究科, 教授 (80371714)
• Co-Investigator(Kenkyū-buntansha): 山本 由弦 神戸大学, 理学研究科, 教授 (10435753) ; 木下 正高 東京大学, 地震研究所, 教授 (50225009) ; 濱田 洋平 国立研究開発法人海洋研究開発機構, 高知コア研究所, 研究員 (80736091)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Project Status: Completed (Fiscal Year 2023)
• Budget Amount: ¥45,630,000 (Direct Cost: ¥35,100,000、Indirect Cost: ¥10,530,000); Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2022: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000); Fiscal Year 2021: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000); Fiscal Year 2020: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000); Fiscal Year 2019: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
• Keywords: 布田川断層 / 温度分布 / 地下水 / 応力状態 / 孔内温度分布 / 熱物性 / 地震断層掘削 / 温度構造 / 摩擦熱 / 地質構造 / 間隙率

Outline of Research at the Start

マグニチュード7.1の熊本地震は、2016年4月16日に、布田川断層が滑ったことにより発生した。地震発生後、深度700mの調査孔が阿蘇火山地帯に位置する益城町で掘削され、震源断層布田川断層を貫通した。本研究では、まず当該掘削孔を利用して、布田川断層の地震時すべりの摩擦熱による温度の異常分布を正確に測定し、熊本地震時の断層のすべり特性である動的摩擦係数の決定を目指す。また、当該掘削孔では特異な温度分布が認められていたため、本研究はこの特異な温度構造を確実に捉え、その形成メカニズムを解明したい。

Outline of Final Research Achievements

After the Mw 7.0 mainshock of the 2016 Kumamoto earthquake sequence, a 700 m-deep borehole and two shallow boreholes drilled for scientific investigation penetrated the Futagawa fault which ruptured during the mainshock. In this study, an ancient >200 m cumulative normal faulting displacement along the Futagawa fault dextrally slipped during the mainshock was identified by analyses of retrieved rock samples and logging data in the multiborehole drilling program. For identifying possible temperature anomaly caused by coseismic frictional heating of the Futagawa fault, measurements of temperature depth profile in the deep main borehole were repeated, and temperature change with time was monitored. In addition, observation of groundwater level in the main borehole in which groundwater is connecting to the aquifer below 300 m-depth suggested that the second aquifer layer traditionally confirmed at shallower than 200 m might extend to the formations below 300 m.

Academic Significance and Societal Importance of the Research Achievements

地震は震源断層が高速で滑ることによって発生するため，断層の滑り特性は被害を引き起こす地表の地震動などを大きく左右する．2016年に発生した熊本地震（本震）の震源である布田川断層についてもその滑り特性は未解明の部分が多い．本研究では，熊本地震後に掘削された深度700ｍの調査孔を利用して，布田川断層に関する研究を行った。研究成果の一例として，布田川断層は熊本地震ではほぼ水平にずれるように滑っていたが，約9万年前までは縦に滑ることによる累積の鉛直落差が200 mにも及んでいることを発見した．このような研究の知見の積み重ねは，将来の地震・津波に対する防災・減災対策の構築にも資すると期待される．

Research Products

• [Int'l Joint Research] 中国地質科学院/地質力学研究所(中国)
• [Int'l Joint Research] コネチカット大学(米国)
• [Int'l Joint Research] 中国地質科学院/地質力学研究所(中国)
• [Int'l Joint Research] University of California, Santa Cruz(米国)
• [Int'l Joint Research] Chinese Academy of Sciences(中国)
• [Int'l Joint Research] National Taiwan Normal University(その他の国・地域)
• [Int'l Joint Research] Victoria University of Wellington(ニュージーランド)
• [Journal Article] Anisotropy of Thermal Conductivity and P-wave Velocity in Sedimentary Soft Rocks and their Relationships with Porosity (2024)
  • Author(s): 友松 広大, 神谷 奈々, 林 為人, 石塚 師也
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 73 Issue: 3 Pages: 205-211
  • DOI: 10.2472/jsms.73.205
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2024-03-15
  • Peer Reviewed / Open Access
• [Journal Article] Anisotropy of Consolidation Yield Stress and Comparison with Anisotropy of Elastic Wave Velocity and Tensile Strength in Sedimentary Soft Rocks (2024)
  • Author(s): MIYAZAKI Masahiro、KAMIYA Nana、LIN Weiren、ISHITSUKA Kazuya
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 73 Issue: 1 Pages: 84-91
  • DOI: 10.2472/jsms.73.84
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2024-01-15
  • Peer Reviewed / Open Access
• [Journal Article] Comprehensive analysis of stress magnitude and orientations and natural fractures in complex structural regimes oil reservoir: Implications for tectonic and oil field development in the Zagros suture zone (2024)
  • Author(s): Mafakheri Bashmagh Nazir、Lin Weiren、Radwan Ahmed E.、Manshad Abbas Khaksar
  • Journal Title: Marine and Petroleum Geology Volume: 160 Pages: 106615-106615
  • DOI: 10.1016/j.marpetgeo.2023.106615
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Compressive Strength of a Pliocene Sedimentary Soft Rock Retrieved from Nankai Trough Ocean Drillings (2023)
  • Author(s): Lin Weiren、Nakamura Toshiaki、Kamiya Nana、Murata Sumihiko
  • Journal Title: MATERIALS TRANSACTIONS Volume: 64 Issue: 12 Pages: 2722-2728
  • DOI: 10.2320/matertrans.MT-Z2023007
  • ISSN: 1345-9678, 1347-5320
  • Year and Date: 2023-12-01
  • Peer Reviewed / Open Access
• [Journal Article] Measurements of Thermal Conductivity of Intact Rocks by Using Cuttings (2023)
  • Author(s): HASHIMOTO Shun、LIN Weiren、ISHITSUKA Kazuya
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 72 Issue: 11 Pages: 828-835
  • DOI: 10.2472/jsms.72.828
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2023-11-15
  • Peer Reviewed / Open Access
• [Journal Article] Spatial and Temporal Stress Variations before and after the 2008 Wenchuan <i>M</i>_w 7.9 Earthquake and its Implications: A Study based on Borehole Stress Data (2023)
  • Author(s): MENG Wen、LIN Weiren、CHEN Qunce、LI Yonghua
  • Journal Title: Acta Geologica Sinica - English Edition Volume: 97 Issue: 1 Pages: 226-242
  • DOI: 10.1111/1755-6724.14965
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurement of thermal conductivities of drill cuttings and quantification of the contribution of thermal conduction to the temperature log of the Hachimantai geothermal field, Japan (2023)
  • Author(s): Sugamoto Haruto、Ishitsuka Kazuya、Lin Weiren、Sakai Takemi
  • Journal Title: Geothermics Volume: 112 Pages: 102742-102742
  • DOI: 10.1016/j.geothermics.2023.102742
  • Peer Reviewed
• [Journal Article] Three-dimensional stress state above and below the plate boundary fault after the 2011 Mw 9.0 Tohoku earthquake (2023)
  • Author(s): Lin Weiren、Yamamoto Yuhji、Hirose Takehiro
  • Journal Title: Earth and Planetary Science Letters Volume: 601 Pages: 117888-117888
  • DOI: 10.1016/j.epsl.2022.117888
  • Peer Reviewed / Open Access
• [Journal Article] Calculation of P-Wave Velocity in Sandstones with Different Pore Size Distributions Using Digital Rock Model without Segmentation (2022)
  • Author(s): K. Ishitsuka, W. Lin, N. Kamiya and Y. Nara
  • Journal Title: MATERIALS TRANSACTIONS Volume: 63 Issue: 11 Pages: 1515-1522
  • DOI: 10.2320/matertrans.MT-Z2022014
  • ISSN: 1345-9678, 1347-5320
  • Year and Date: 2022-11-01
  • Peer Reviewed / Open Access
• [Journal Article] Observations on Groundwater Level Change at Depths below 300 m in a Borehole Penetrating through the Futagawa Fault (2022)
  • Author(s): SHIBUTANI Susumu、LIN Weiren、SADO Koichiro、KAMIYA Nana、SUGIMOTO Tatsuhiro
  • Journal Title: Journal of the Japan Society of Engineering Geology Volume: 63 Issue: 1 Pages: 13-23
  • DOI: 10.5110/jjseg.63.13
  • ISSN: 0286-7737, 1884-0973
  • Year and Date: 2022-04-10
  • Peer Reviewed / Open Access
• [Journal Article] Compressive Strength of a Pliocene Sedimentary Soft Rock Retrieved from Nankai Trough Ocean Drillings (2022)
  • Author(s): 林 為人、中村 敏明、神谷 奈々、村田 澄彦
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 71 Issue: 3 Pages: 251-258
  • DOI: 10.2472/jsms.71.251
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2022-03-15
  • Peer Reviewed / Open Access
• [Journal Article] Estimation of Porosity for Sedimentary Rocks and Volcanic Rocks from Sonic Log Data in the Futagawa Fault Drilling (2022)
  • Author(s): 澁谷奨、林為人、佐野暉、村田澄彦、藤井元宏、佐渡耕一郎
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 71 Issue: 3 Pages: 243-250
  • DOI: 10.2472/jsms.71.243
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2022-03-15
  • Peer Reviewed / Open Access
• [Journal Article] Calculation of P-Wave Velocity in Sandstones with Different Pore Size Distributions Using Digital Rock Model without Segmentation (2022)
  • Author(s): 石塚師也, 林為人, 神谷奈々, 奈良禎太
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 71 Issue: 3 Pages: 235-242
  • DOI: 10.2472/jsms.71.235
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2022-03-15
  • Peer Reviewed / Open Access
• [Journal Article] Determining In-Situ Stress State by Anelastic Strain Recovery Method Beneath Xiamen: Implications for the Coastal Region of Southeastern China (2022)
  • Author(s): Zhang Chongyuan、Lin Weiren、He Manchao、Tao Zhigang、Meng Wen
  • Journal Title: Rock Mechanics and Rock Engineering Volume: 55 Issue: 9 Pages: 5687-5703
  • DOI: 10.1007/s00603-022-02915-7
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnitudes and orientations of present-day in-situ stresses in the Kurdistan region of Iraq: Insights into combined strike-slip and reverse faulting stress regimes (2022)
  • Author(s): Mafakheri Bashmagh Nazir、Lin Weiren、Murata Sumihiko、Yousefi Foad、Radwan Ahmed E.
  • Journal Title: Journal of Asian Earth Sciences Volume: 239 Pages: 105398-105398
  • DOI: 10.1016/j.jseaes.2022.105398
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] An Ancient >200m Cumulative Normal Faulting Displacement Along the Futagawa Fault Dextrally Ruptured During the 2016 Kumamoto, Japan, Earthquake Identified by a Multiborehole Drilling Program (2022)
  • Author(s): Shibutani Susumu、Lin Weiren、Sado Koichiro、Aizawa Akihiro、Koike Katsuaki
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 23 Issue: 1
  • DOI: 10.1029/2021gc009966
  • NAID: 120007185927
  • Peer Reviewed / Open Access
• [Journal Article] Stability of novel cellulose-nanofiber-containing foam as environmentally friendly fracturing fluid (2022)
  • Author(s): Ishii Mikihito、Murata Sumihiko、Ishitsuka Kazuya、Lin Weiren
  • Journal Title: Journal of Petroleum Science and Engineering Volume: 208 Pages: 109512-109512
  • DOI: 10.1016/j.petrol.2021.109512
  • Peer Reviewed
• [Journal Article] Theoretical Investigation on New Analyzing Procedure of Anelastic Strain Recovery Method for Stress Measurements Based on Bayesian Statistical Modeling (2021)
  • Author(s): Sugimoto Tatsuhiro、Ishitsuka Kazuya、Lin Weiren
  • Journal Title: MATERIALS TRANSACTIONS Volume: 62 Issue: 12 Pages: 1695-1702
  • DOI: 10.2320/matertrans.MT-Z2021015
  • NAID: 130008120267
  • ISSN: 1345-9678, 1347-5320
  • Year and Date: 2021-12-01
  • Peer Reviewed / Open Access
• [Journal Article] Measurements of Post-seismic Stress State to 700 Meters Depth Using Anelastic Strain Recovery Method in Source Area of the 2016 Kumamoto Earthquakes (2021)
  • Author(s): 杉本達洋，澁谷 奨，林 為人，村田澄彦
  • Journal Title: Journal of the Japan Society of Engineering Geology Volume: 62 Issue: 1 Pages: 13-22
  • DOI: 10.5110/jjseg.62.13
  • NAID: 130008114357
  • ISSN: 0286-7737, 1884-0973
  • Year and Date: 2021-04-10
  • Peer Reviewed / Open Access
• [Journal Article] A Method for Core Reorientation Based on Rock Remanent Magnetization: Application to Hemipelagic Sedimentary Soft Rock (2020)
  • Author(s): Sugimoto, T., Yamamoto, Y., Yamamoto, Y., Lin, W.
  • Journal Title: MATERIALS TRANSACTIONS Volume: 61 Issue: 8 Pages: 1638-1644
  • DOI: 10.2320/matertrans.Z-M2020832
  • NAID: 130007879869
  • ISSN: 1345-9678, 1347-5320
  • Year and Date: 2020-08-01
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A Method for Core Reorientation Based on Rock Remanent Magnetization:Application to Hemipelagic Sedimentary Soft Rock (2020)
  • Author(s): SUGIMOTO Tatsuhiro, YAMAMOTO Yuhji, YAMAMOTO Yuzuru, LIN Weiren
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 69 Issue: 3 Pages: 256-262
  • DOI: 10.2472/jsms.69.256
  • NAID: 130007812167
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2020-03-15
  • Peer Reviewed / Open Access
• [Journal Article] Strain Softening of Siltstones in Consolidation Process (2020)
  • Author(s): KAMIYA Nana, ZHANG Feng, FUKUOKA Junichi, KATO Yushi, LIN Weiren
  • Journal Title: Journal of the Society of Materials Science, Japan Volume: 69 Issue: 3 Pages: 250-255
  • DOI: 10.2472/jsms.69.250
  • NAID: 130007812178
  • ISSN: 0514-5163, 1880-7488
  • Year and Date: 2020-03-15
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Thermal Conductivity Profile in the Nankai Accretionary Prism at IODP NanTroSEIZE Site C0002: Estimations From High‐Pressure Experiments Using Input Site Sediments (2020)
  • Author(s): Lin Weiren、Hirose Takehiro、Tadai Osamu、Tanikawa Wataru、Ishitsuka Kazuya、Yang Xiaoqiu
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 21 Issue: 7
  • DOI: 10.1029/2020gc009108
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Seasonal and transient surface displacements in the Kumamoto area, Japan, associated with the 2016 Kumamoto earthquake: implications for seismic-induced groundwater level change (2020)
  • Author(s): Ishitsuka Kazuya、Tsuji Takeshi、Lin Weiren、Kagabu Makoto、Shimada Jun
  • Journal Title: Earth, Planets and Space Volume: 72 Issue: 1
  • DOI: 10.1186/s40623-020-01275-2
  • Peer Reviewed / Open Access
• [Journal Article] Analysis on the mechanisms of coseismic temperature negative anomaly in fault zones (2020)
  • Author(s): Yang X., Lin, W., Yeh E-C., Xu, H., Xu, Z.
  • Journal Title: Chinese Journal of Geophysics Volume: 63 Pages: 1422-1430
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thermal properties of the hanging wall of the central Alpine Fault, New Zealand (2020)
  • Author(s): Janku-Capova Lucie、Sutherland Rupert、Townend John、Lin Weiren
  • Journal Title: New Zealand Journal of Geology and Geophysics Volume: 64 Issue: 4 Pages: 530-541
  • DOI: 10.1080/00288306.2020.1828939
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Stress-state differences between sedimentary cover and basement of the Songliao Basin, NE China: In-situ stress measurements at 6?7 km depth of an ICDP Scientific Drilling borehole (SK-II) (2020)
  • Author(s): Wang Bin, Sun Dongsheng, Chen Qunce, Lin Weiren, Li A-Wei, Cao Hui
  • Journal Title: Tectonophysics Volume: 777 Pages: 228337-228337
  • DOI: 10.1016/j.tecto.2020.228337
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Vitrinite reflectance and consolidation characteristics of the post‐middle Miocene Forearc Basin in central and eastern Boso Peninsula, central Japan: Implications for basin subsidence (2020)
  • Author(s): Kamiya Nana, Yamamoto Yuzuru, Zhang Feng, Lin Weiren
  • Journal Title: Island Arc Volume: 29 Issue: 1 Pages: 1-14
  • DOI: 10.1111/iar.12344
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The State of Stress on the Fault Before, During, and After a Major Earthquake (2019)
  • Author(s): Brodsky, E.E., Mori, J. J., Anderson, L., Chester, F. M., Conin, M., Dunham, E. M., Eguchi, N., Fulton, P., Hino, R., Hirose, T., Ikari, M., Ishikawa, T., Jeppson, T., Kano, Y., Kirkpatrick, J., Kodaira, S., Lin, W., Nakamura, Y., Rabinowitz, H, Regalla, C., Remitti, F., Rowe, C., Saffer, D., Saito, S. et al.
  • Journal Title: Annual Review of Earth and Planetary Sciences Volume: 48 Issue: 1 Pages: 49-74
  • DOI: 10.1146/annurev-earth-053018-060507
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 布田川断層掘削における地質構造・温度分布・地下水の調査 (2023)
  • Author(s): 林 為人、澁谷 奨、神谷 奈々、佐渡 耕一郎、FENG Shuai、石塚 師也
  • Organizer: 日本地球惑星科学連合 (JPGU) 2023年大会
  • Invited
• [Presentation] Verification of the existence of vertical groundwater flow in a borehole using a heating flow meter (2023)
  • Author(s): 馮 帥, 林 為人，澁谷 奨，佐渡耕一郎，重光勇太朗
  • Organizer: 日本地球惑星科学連合 (JPGU) 2023年大会
• [Presentation] 堆積軟岩の正規圧密プロセスにおける熱物性の変化特性 (2023)
  • Author(s): 山田共喜，林 為人，石塚師也，神谷奈々，宮崎裕博，友松広大
  • Organizer: 日本地球惑星科学連合 (JPGU) 2023年大会
• [Presentation] Determining in-situ stress in the southeast Zagros fold and thrust belt by using image logs and conventional logs (2023)
  • Author(s): Nazir Mafakheri B., Weiren Lin
  • Organizer: 日本地球惑星科学連合 (JPGU) 2023年大会
• [Presentation] 加熱式フローメーターによるボーリング孔内流れ計測への適用性検討 (2023)
  • Author(s): 馮 帥，林 為人，澁谷 奨
  • Organizer: 資源素材学会関西支部第20回『若手研究者・学生のための研究発表会』
• [Presentation] Preliminary results of three-dimensional stress orientation in the Kumano forearc basin of the Nankai Subduction Zone, Japan by anelastic strain recovery measurements of core samples retrieved from IODP drilling sites C0025 and C0009 (2023)
  • Author(s): Lin W., Yamamoto Yuzuru, Byrne, T., Yamamoto Yuhji, Kamiya N., Hirose T., Ito, T.
  • Organizer: AGU Fall Meeting 2023
  • Int'l Joint Research
• [Presentation] Anisotropy of thermal conductivity and P-wave velocity related to porosity using sedimentary soft rocks taken from the Mio-Pleistocene forearc basin in the Boso Peninsula, central Japan (2023)
  • Author(s): Tomomatsu, K., Kamiya, N., Lin, W., Ishitsuka, K.
  • Organizer: AGU Fall Meeting 2023
  • Int'l Joint Research
• [Presentation] Relationship between thermal conductivity and porosity in sedimentary soft rocks by an experimental approach (2023)
  • Author(s): Lin W. and Tadai O.
  • Organizer: ISRM 15th International Congress on Rock Mechanics and Rock Engineering
  • Int'l Joint Research
• [Presentation] Correlations between thermal properties and elastic wave velocities of volcanic rocks (2023)
  • Author(s): Feng S., Lin W., Shibutani S., Sano T., Kamiya N.
  • Organizer: ISRM 15th International Congress on Rock Mechanics and Rock Engineering
  • Int'l Joint Research
• [Presentation] Fracture characteristics obtained from core observations and image logs in a borehole drilled through an active fault zone (2023)
  • Author(s): Shibutani S., Lin W., Sado K.
  • Organizer: ISRM 15th International Congress on Rock Mechanics and Rock Engineering
  • Int'l Joint Research
• [Presentation] Relationship between thermal conductivity and elastic wave velocity of rock core samples collected from Aso volcanic region in Kumamoto, Japan (2022)
  • Author(s): Feng Shuai, 林為人, 神谷奈々, 佐野暉
  • Organizer: 日本地球惑星科学連合 (JPGU) 2022年大会
• [Presentation] 岩石の熱物性の異方性に関する実験的研究：新第三紀および第四紀堆積軟岩を例として (2022)
  • Author(s): 友松広大，神谷奈々，林為人，石塚師也
  • Organizer: 日本地球惑星科学連合 (JPGU) 2022年大会
• [Presentation] 粒状試料を用いた岩石コア熱伝導率推定手法に対する検討 (2022)
  • Author(s): 橋本駿，林為人
  • Organizer: 日本材料学会第71期通常総会・学術講演会
• [Presentation] 火山地域産出の岩石を対象とした比抵抗特性に関する研究 (2022)
  • Author(s): 藤井元宏，林為人，澁谷奨，石塚師也
  • Organizer: 2022年度資源・素材関係学協会合同秋季大会
• [Presentation] 非定常面熱源法を用いたカッティングス試料の熱物性測定および N19-HA-1 坑井の温度プロファイルの考察 (2022)
  • Author(s): 菅本大仁，石塚師也，林為人，坂井健海
  • Organizer: 日本地熱学会令和４年学術講演会
• [Presentation] Three-dimensional stress state above and below the plate boundary fault after the Mw 9.0 Tohoku earthquake determined by ASR method from IODP Expedition 343 (2022)
  • Author(s): Lin, W., Yamamoto, Y., Hirose, T.
  • Organizer: AGU Fall Meeting 2022
  • Int'l Joint Research
• [Presentation] Shear mechanical behavior by considering anisotropic roughness of rock fracture (2022)
  • Author(s): Xu, X., Lin, W., Bao, H., Yin, P.
  • Organizer: AGU Fall Meeting 2022
  • Int'l Joint Research
• [Presentation] Present-day in situ stresses in the northeastern Zagros suture zone in the Kurdistan region of Iraq (2022)
  • Author(s): Mafakheri, N., Lin, W., Khaksar Manshad, A.
  • Organizer: AGU Fall Meeting 2022
  • Int'l Joint Research
• [Presentation] Establishment of a new method for estimating the thermal conductivity of intact rock by using cuttings (2022)
  • Author(s): Hashimoto, S., Lin, W.
  • Organizer: AGU Fall Meeting 2022
  • Int'l Joint Research
• [Presentation] Estimation of porosity depth profile using a combination of electrical log and core data (2022)
  • Author(s): Fujii, M., Lin, W., Shibutani, S., Ishituka, K.
  • Organizer: AGU Fall Meeting 2022
  • Int'l Joint Research
• [Presentation] hysical properties of rock. core samples collected from Aso volcanic region: relationships among porosity, thermal conductivity and elastic wave velocity (2022)
  • Author(s): Feng, S., Lin, W., Sano, T., Shibutani, S., Kamiya, N.
  • Organizer: AGU Fall Meeting 2022
  • Int'l Joint Research
• [Presentation] Using the combination of conventional logs, borehole image log, and six-arm caliper for determining the orientation and magnitude of principal in-situ stresses: A case study in Zagros suture zone in Kurdistan Region of Iraq (2021)
  • Author(s): Mafakheli Bashmagh, N., Lin, W., Yousefi, F.
  • Organizer: 14th SEGJ International Symposium
  • Int'l Joint Research
• [Presentation] Surface displacement during the periods before and after the 2018 northern Osaka earthquake estimated by PSInSAR analysis (2021)
  • Author(s): Shigemitsu, Y., Ishitsuka, K., and Lin, W.
  • Organizer: 14th SEGJ International Symposium
  • Int'l Joint Research
• [Presentation] 布田川断層のボーリング調査における孔内温度測定と岩石コアの熱伝導率測定 (2021)
  • Author(s): 林 為人，澁谷奨，佐野 暉，神谷奈々，佐渡耕一郎
  • Organizer: 日本応用地質学会令和３年度研究発表会
• [Presentation] Measurements of Thermal Properties and Plastic Wave Velocities of Rock Core Samples Collected from Aso Voclanic Region in Kumamoto (2021)
  • Author(s): Feng Shuai，林 為人，神谷奈々
  • Organizer: 資源・素材学会関西支部 第18回「若手研究者・学生のための研究発表会」
• [Presentation] 海洋掘削による新第三紀堆積軟岩試料の三軸圧縮強度 (2021)
  • Author(s): 林 為人・中村 敏明・村田 澄彦
  • Organizer: 第15回岩の力学国内シンポジウム講演集
• [Presentation] 活断層を貫通したボーリング孔における物理検層データおよびそれによる間隙率の推定 (2021)
  • Author(s): 澁谷 奨, 林 為人, 佐野 暉, 藤井元宏, 佐渡耕一郎
  • Organizer: 第15回岩の力学国内シンポジウム講演集
• [Presentation] ホットディスク法による異なる岩種の熱物性の相違に関する研究 (2021)
  • Author(s): 佐野 暉, 林 為人, 村田 澄彦, 澁谷 奨
  • Organizer: 第15回岩の力学国内シンポジウム講演集
• [Presentation] 火山地域の掘削コア試料の室内比抵抗測定とその影響要因に関する考察 (2021)
  • Author(s): 藤井元宏，林 為人，石塚師也，村田澄彦，澁谷 奨
  • Organizer: 第15回岩の力学国内シンポジウム講演集
• [Presentation] Thermal conductivity under high-pressure conditions of core samples from IODP NanTroSEIZE input site C0012 (2020)
  • Author(s): Lin, W., Tadai, O., Hirose, T., Tanikawa, W., Yang, X.
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Resistivity characteristics of various core samples from Aso volcano and its discussion (2020)
  • Author(s): Fujii, M., Lin, W., Ishitsuka, K., and Shibutani, S.
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] 布田川断層を貫通した深部ボーリングFDB孔における地下水変動の観測 (2020)
  • Author(s): 澁谷 奨, 林 為人, 杉本達洋, 佐渡耕一郎, 神谷奈々
  • Organizer: 令和2年度日本応用地質学会研究発表会
• [Presentation] A preliminary result of temperature depth profile in a drilling borehole penetrated the futagawa fault ruptured during the 2016 kumamoto Mw 7.1 Earthquake (2019)
  • Author(s): Weiren LIN
  • Organizer: International Conference in Commemoration of 20th Anniversary of the 1999 Chi-Chi Earthquake
  • Int'l Joint Research / Invited
• [Presentation] Temperature measurements in a scientific-drilling borehole penetrated through the Futagawa Fault slipped during the 2016 Kumamoto earthquake (Mw 7.0) (2019)
  • Author(s): Weiren Lin , Susumu Shibutani , Nana Kamiya , Tatsuhiro Sugimoto, Terasu Sano, Koichiro Sado , Yuzuru Yamamoto , Xiaoqiu Yang , Kazuya Ishitsuka and Masataka Kinoshita
  • Organizer: AGU Fall Meeting 2019
  • Int'l Joint Research
• [Presentation] Stress measurements in the vicinity of the Futagawa fault based on drilled rock core samples retrieved from a scientific-drilling borehole (2019)
  • Author(s): Tatsuhiro Sugimoto and Weiren Lin
  • Organizer: AGU Fall Meeting 2019
  • Int'l Joint Research
• [Presentation] Measurements of thermal properties of core samples for interpreting an abnormal temperature depth profile observed in Futagawa fault drilling (2019)
  • Author(s): Terasu Sano, Weiren Lin , Susumu Shibutani and Takehiro Hirose
  • Organizer: AGU Fall Meeting 2019
  • Int'l Joint Research
• [Presentation] iscussion on groundwater flow around the active Futagawa Fault based on geological structure and physical properties (2019)
  • Author(s): Susumu Shibutani, Weiren Lin, Koichiro Sado and Akihiro Aizawa
  • Organizer: AGU Fall Meeting 2019
  • Int'l Joint Research
• [Presentation] 熊本県益城町の布田川断層帯における深部ボーリングFDB-1 孔の地質と岩盤物性 (2019)
  • Author(s): 澁谷奨、佐渡耕一郎，相澤明宏，林為人
  • Organizer: 日本応用地質学会令和元年度研究発表会
• [Remarks] 【研究成果】布田川断層での200 mを超える落差の発見
  • URL: https://www.t.kyoto-u.ac.jp/ja/news/topics/research/20220128
• [Remarks] Volcanoes at fault if the Earth slips
  • URL: https://www.kyoto-u.ac.jp/en/research-news/2022-04-25-0
• [Remarks] Volcanoes at fault if the Earth slips
  • URL: https://www.eurekalert.org/news-releases/950488