[S-SS08] Fault Rheology and Earthquake Physics

Thu. Jun 3, 2021 3:30 PM - 5:00 PM Ch.20 (Zoom Room 20)

convener:Shunya Kaneki(Disaster Prevention Research Institute, Kyoto University), Makiko Ohtani(Earthquake Research Institute, the University of Tokyo), Keishi Okazaki(Japan Agency for Marine-Earth Science and Technology), Keisuke Yoshida(Tohoku University), Chairperson:Makiko Ohtani(Earthquake Research Institute, the University of Tokyo), Keisuke Yoshida(Tohoku 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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3:30 PM - 3:45 PM

[SSS08-01] Fault frictional heterogeneities can explain earthquakes with no foreshocks, accelerating foreshocks and earthquake swarms observed in central Alaska

★Invited Papers

*Yoshihiro Kaneko¹, Nealey Sims², Carl Tape², Stephen Holtkamp², Andrea Perez³ (1.Kyoto University, 2.University of Alaska - Fairbanks, 3.Victoria University of Wellington)

3:45 PM - 4:00 PM

[SSS08-02] Rupture segmentation caused by fault bends in simulated earthquake sequences

*So Ozawa¹, Ryosuke Ando¹ (1.Graduate School of Science, the University of Tokyo)

4:00 PM - 4:15 PM

[SSS08-03] Energy-based scenarios for the Nankai trough subduction earthquakes: Stress accumulation model taking historical earthquakes into account

*Akemi Noda¹, Tatsuhiko Saito² (1.Meteorological Research Institute, Japan Meteorological Agency, 2.National Research Institute for Earth Science and Disaster Resilience)

4:15 PM - 4:30 PM

[SSS08-04] Estimation of absolute shear stress in the source region of large earthquakes based on estimates of fault fracture energy

*Nelson Pulido¹ (1.National Research Institute for Earth Science and Disaster Resilience)

4:30 PM - 4:45 PM

[SSS08-05] Three-dimensional tectonic stress fields estimated from seismic data for long-term periods with direct prior information

*Toshiko Terakawa¹ (1.Earthquake and Volcano Research Center, Graduate School of Environmental Studies, Nagoya University)

4:45 PM - 5:00 PM

[SSS08-06] Spatial and temporal change of stress field in the focal area of the 2016 Kaikoura earthquake, New Zealand (2)

Miu Matsuno¹, Ayaka Tagami¹, *Tomomi Okada¹, Satoshi Matsumoto², Yuta Kawamura², Yoshihisa Iio³, Tadashi Sato¹, Takashi NAKAYAMA¹, Satoshi Hirahara¹, Stephen Bannister⁴, John Ristau⁴, Martha K Savage⁵, Clifford H Thurber⁶, Richard H Sibson⁷ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University, 3.Disaster Prevention Research Institute, Kyoto University, 4.GNS Science, New Zealand, 5.Victoria University of Wellington, New Zealand, 6.University of Wisconsin - Madison, United States of America, 7.University of Otago, New Zealand)

Session information