[S-CG51] New perspectives of subduction zone earthquake dynamics through experiments across-scales

Thu. Jun 3, 2021 1:45 PM - 3:15 PM Ch.19 (Zoom Room 19)

convener:Masataka Kinoshita(Earthquake Research Institute, University of Tokyo), Chairperson:Masataka Kinoshita(Earthquake Research Institute, University of Tokyo), Toshinori Kimura(Japan Agency for Marine-Earth Science and Technology)

Knowledge on subduction zone earthquake phenomena has considerably increased in the last decade. On the other hand, there are limits to seismological approach alone to comprehensively elucidate the earthquake mechanism in which phenomena that differ by 10 orders of magnitude in space and time, from earthquake nucleation/growth processes to its driving force. Steps to enable scientific earthquake forecasting should include; monitoring regional seismic/tectonic activity using networked observatories, sampling of and insitu measurement in seismogenic faults and plate materials through ultra-deep drilling, and reproduction/insitu-observation of fracture nucleation processes by high-pressure quantum-beam experiments. Through a close collaboration, we challenge a dynamic imaging of earthquake processes. Based on the proposal approved as a Large Research Master Plan 2020 of the Science Council of Japan, we will deepen the interdisciplinary discussion on subduction-zone earthquakes and the state & property of lithosphere. We welcome, but not limited to, presentations from fields of ocean and land networks observation, seismogenic zone drilling, rock mechanical & quantum beam experiments, fracture process
theory, etc.

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1:45 PM - 2:00 PM

[SCG51-01] Current status and future plan of deformation and fracture experiments at SPring-8/BL04B1

★Invited Papers

*Yuji Higo¹ (1.Japan Synchrotron Radiation Research Institute)

2:00 PM - 2:15 PM

[SCG51-02] Ultrasonic elastic wave velocity measurement of antigorite at high pressures to 10 GPa

*Yoshio Kono¹, Riseno Nose¹, Nozomi Kondo¹, Ken-ichi Hirauchi² (1.Geodynamics Research Center, Ehime University, 2.Shizuoka University)

2:15 PM - 2:30 PM

[SCG51-03] Depth-dependent frictional properties of mud gouge in the Nankai Trough accretionary prism

*Kyuichi Kanagawa¹, Tomohiro Ishii², Tomoya Funaki², Junya Fujimori³, Michiyo Sawai¹ (1.Graduate School of Science, Chiba University, 2.Faculty of Science, Chiba University, 3.Graduate School of Science and Engineering, Chiba University)

2:30 PM - 2:45 PM

[SCG51-04] Seafloor fiber optic strainmeter performance with different cable laying condition.

*Eiichiro Araki¹, Shuhei Nishida¹, Takashi Yokobiki¹, Matthew James Cook¹, Mark Zumberge², Toshinori Kimura¹, Yuya Machida¹, Shuichi Kodaira¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.IGPP, Scripps Institution of Oceanography)

2:45 PM - 3:00 PM

[SCG51-05] Real-time SSE monitoring by optical borehole tiltmeter in the Nankai Trough, Japan

*Toshinori Kimura¹, Eiichiro Araki¹, Takashi Yokobiki¹, Shuhei Nishida¹, Matthew J Cook¹, Mark Zumberge², Keisuke Takahashi³, Takane Hori¹, Shuichi Kodaira¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.Scripps Institution of Oceanography, 3.UBE Industries, Ltd.)

3:00 PM - 3:15 PM

[SCG51-06] Thermal maturity observations depend on the structural history of the wedge

*Utsav Mannu¹, David Fernández-Blanco², Ayumu Miyakawa³, Taras Gerya⁴, Masataka Kinoshita⁵ (1.Indian Institute of Science Education and Research Pune, 2.Barcelona Center of Subsurface Imaging, Institut de Ciències del Mar (ICM-CSIC), Barcelona, 3.Geological Survey of Japan, AIST, 4.Institute of Geophysics, ETHZ Zurich, 5.Earthquake and Volcano Information, Earthquake Research Institute, Tokyo-U)

Session information