[S-SS10] Fault Rheology and Earthquake Physics

Fri. May 30, 2025 1:45 PM - 3:15 PM Exhibition Hall Special Setting (3) (Exhibition Hall 7&8, Makuhari Messe)

convener:Ritsuya Shibata(National Research Institute for Earth Science and Disaster Resilience), Michiyo Sawai(Chiba University), Hanaya Okuda(Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology), Kenichi Tsuda(Institute of Technology, Shimizu Corporation), Chairperson:Hanaya Okuda(Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology), Michiyo Sawai(Chiba University)

The goal of this session is to integrate theoretical, experimental, observational, and numerical perspectives from various fields such as seismology, geodesy, geology, mineralogy, and so on, to define what is known about earthquake source processes and the physical and chemical elementary processes of faulting. This session welcomes studies that address such issues as pre-, co-, and post-seismic processes, the rheology of seismogenic faults and fault rocks, laboratory experiments on elementary processes, numerical models based on frictional laws, and estimates of the stress field in the seismogenic zones. We also welcome studies on fault-zone drilling projects and in situ stress measurements.

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1:45 PM - 2:00 PM

[SSS10-17] Multi-Fault Segment Complexity and Multi-Rupture Episodes during the 2024 Mw 7.5 Noto Peninsula Earthquake

*Rintaro Enomoto¹, Yoshihiro Kaneko¹, Chi-Hsien Tang², Yo Fukushima², Hiroyuki Goto³, Shin'ichi Miyazaki¹ (1.Graduate School of Science, Kyoto University, 2.International Research Institute of Disaster Science, Tohoku University, 3.Disaster Prevention Research Institute, Kyoto University)

2:00 PM - 2:15 PM

[SSS10-18] Detailed S-wave velocity structure in the onshore focal area of the 2024 Noto earthquake revealed by dense nodal seismic observations

*Ryota Takagi¹, Keisuke Yoshida¹, Tomomi Okada¹, Shun Fukushima¹, Masatoshi Miyazawa², Takuto Maeda³, Shiro Hirano³, Motoko Ishise⁴, Takahiro Shiina⁵, Yoshihiro Hiramatsu⁶ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Disaster Prevention Research Institute, Kyoto University, 3.Graduate School of Science and Technology, Hirosaki University, 4.Faculty of Science, Yamagata University, 5.National Institute of Advanced Industrial Science and Technology, 6.School of Geosciences and Civil Engineering, Kanazawa University)

2:15 PM - 2:30 PM

[SSS10-19] Graphene Oxide in the Fault Gouge of the Atotsugawa Fault System: Relationship of Fault Movement and Redox Reactions

*Tomoya Shimada¹, Hiroyuki Nagahama¹, Jun Muto¹, Norihiro Nakamura² (1.Graduate School of Science, Department of Earth Science, Tohoku University, 2.Tohoku Gakuin University)

2:30 PM - 2:45 PM

[SSS10-20] Thermal Pressurization in Shallow Fault Zone in the Borehole Core of the Neodani Fault

Takumi Yoshida², *Tomoyuki Ohtani¹ (1.Department of Civil Engineering, Gifu University, 2.Graduate School of Natural Science and Technology, Gifu University)

2:45 PM - 3:00 PM

[SSS10-21] ICDP DSeis Project: Spatial variation of seismic wave velocity and alteration of ultramafic dike recovered from a seismogenic zone 3 km below the ground surface

*kaoru fujita¹, Hiroshi Ogasawara², Yasuo Yabe³, Masaki Kanao⁴, Jun'ichi Okuno⁴, Atsushi Okamoto³, Shunya Okino³, hamagaki takaya², Yoshitaka Hashimoto⁵, Akira Tsuchiyama², Yuhji Yamamoto⁵ (1.The Graduate University for Advanced Studies, 2.Ritsumeikan University, 3.Tohoku University, 4.National Institute of Polar Research, 5.Kochi University)

3:00 PM - 3:15 PM

[SSS10-22] Fault zone architecture, creep-cavitation and ductile fractures in crustal-scale faults at the base of the seismogenic zone

★Invited Papers

*Norio Shigematsu¹, Thomas Yeo^1,2,3, Simon Richard Wallis², Kiyokazu Oohashi¹, Takuma Katori⁴, Keita Kobayashi⁵, Tatsuya Sumita⁶, Ayumu Miyakawa⁶, Kohtaro Ujiie³, Chunjie Zhang⁷ (1.Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2.School of Science, University of Tokyo, 3.School of Life and Environmental Sciences, Tsukuba University, 4.Fossa Magna Museum, 5.Research Institute for Material and Chemical Measurement, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 6.Research Institute of Geology and Geoinformation, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 7.Earthquake Research Institute, University of Tokyo)

Session information