JpGU-AGU Joint Meeting 2020

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S (Solid Earth Sciences ) » S-SS Seismology

[S-SS15] Fault Rheology and Earthquake Physics

convener:Keisuke Yoshida(Tohoku University), Keishi Okazaki(Japan Agency for Marine-Earth Science and Technology), Shunya Kaneki(Disaster Prevention Research Institute, Kyoto University), Hiroyuki Noda(Kyoto University, Disaster Prevention Research Institute)

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.

[SSS15-P23] Relationship between the spatiotemporal change of the inelastic strain rate and the state of stress in the aftershock area of the 2016 Kumamoto earthquake sequence

*Ayaho Mitsuoka1, Satoshi Matsumoto2, Azusa Shito2, Hiroshi Shimizu2, Group for urgent joint seismic observation of the 2016 Kumamoto earthquake (1.Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University, 2.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University)

[SSS15-P24] Stress tensor inversion in the focal area of the 2016 Mw7.8 Kaikoura earthquake, New Zealand (4)

*Miu Matsuno1, Tomomi Okada1, Satoshi Matsumoto2, Yuta Kawamura2, Yoshihisa Iio3, Tadashi Sato1, Takashi NAKAYAMA1, Satoshi Hirahara1, Stephen C Bannister4, John Ristau4, Martha K Savage5, Clifford Thurber6, Rick 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 Sciences, Kyushu University, 3.Disater Prevention Research Institute, Kyoto University, 4.GNS Science, Lower Hutt, New Zealand, 5.Victoria University of Wellington, Wellington, New Zealand, 6.University of Wisconsin, Madison, 7.University of Otago, Dunedin, New Zealand )

[SSS15-P25] Stress field in the eastern margin of the Japan Sea and its relationship with faults of recent earthquakes

*Ayaka Tagami1, Tomomi Okada1, Shin'ichi Sakai2, Mako Ohzono3, Kei Katsumata3, Masahiro Kosuga4, Yoshiko Yamanaka5, Hiroshi Katao6, Takeshi Matsushima7, Hiroshi Yakiwara8, Takashi NAKAYAMA1, Satoshi Hirahara1, Toshio Kono1, Shu'ichiro Hori1, Toru Matsuzawa1, Group for the aftershock observations of the 2011 off the Pacific coast of Tohoku Earthquake (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University., 2.Earthquake Research Institute, University of Tokyo, 3.Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University, 4.Graduate School of Science and Technology, Hirosaki University, 5.Graduate School of Encironmental Studies, University of NAGOYA, 6.Research Center for Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University, 7.Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University, 8.Nansei-toko Observatory for Earthquakes and Volcanoes, Kagoshima University)

[SSS15-P26] Stress field estimated from microseismicity in the northeastern edge of the Honshu around the junction between the northeastern Japan arc and the Kurile arc

*Sumire Maeda1, Toru Matsuzawa2, Tomomi Okada2, Takeyoshi Yoshida2, Masahiro Kosuga3, Hiroshi Katao4, Makoto Otsubo1 (1.Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan/AIST, 2.Graduate School of Science, Tohoku University, 3.Graduate School of Science and Technology, Hirosaki University, 4.Research Center for Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University)