[S-CG50] Intraslab and intraplate earthquakes

Thu. May 30, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Saeko Kita(International Institute of Seismology and Earthquake Engineering, BRI), Tomohiro Ohuchi(Geodynamics Research Center, Ehime University), Marcel Thielmann(Bavarian Geoinstitute, University of Bayreuth), Ryo Okuwaki(Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

The purpose of this session is to share recent advances of geo-scientifical studies for intraslab and shallow-depth intraplate earthquakes. We seek to formulate future directions of the interdisciplinary study of the occurrence of intermediate-depth and deep earthquakes from the viewpoint of seismology, geodynamics and mineral physics. We welcome presentations from a wide variety of scientific disciplines, including seismology, seismotectonics, geodynamics, mineral and rock physics, other geophysics, geology, and numerical modeling.

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[SCG50-P01] Changes in seismicity rate, stress orientations, and b-values before and after ETS events in the Philippine sea plate under Kii Peninsula

*Saeko Kita¹, Heidi Houston², Sachiko Tanaka³, Youichi Asano³, Takuo Shibutani⁴, Naoki Suda⁵ (1.Building Research Institute, 2.USC, 3.NIED, 4.DPRI, Kyoto University, 5.Hiroshima University)

[SCG50-P02] Inhomogeneous conduit across slab controlled by intraslab stress heterogeneity in the Nankai subduction zone

*Makoto Otsubo¹, Ayumu Miyakawa², Ikuo Katayama³, Keishi Okazaki⁴ (1.Geological Survey of Japan, Research Institute of Earthquake and Volcano Geology, 2.Geological Survey of Japan, Research Institute of Geology and Geoinformation, 3.Hiroshima University, 4.JAMSTEC)

[SCG50-P03] New insights into the mechanism of deep-focus earthquakes

*Ayako Tsuchiyama¹, Junichi Nakajima¹ (1.Tokyo Institute of Technology)

[SCG50-P04] Faulting in deforming harzburgite under wet conditions

*Tomohiro Ohuchi¹, Xinglin Lei², Yuji Higo³, Yoshinori Tange³, Takeshi Sakai¹ (1.Geodynamics Research Center, Ehime University, 2.National Institute of Advanced Industrial Science and Technology, 3.Japan Synchrotron Radiation Research Institute)

[SCG50-P05] Semi-brittle behavior of olivine single crystals under the conditions of Earth’s mantle transition zone

Yoshihisa Naruse¹, *Tomohiro Ohuchi¹ (1.Geodynamics Research Center, Ehime University)

[SCG50-P06] High-pressure deformation experiments on peridotite gouges under hydrothermal conditions, using a deformation-DIA apparatus

*Maki Semba¹, Ken-ichi Hirauchi¹, Tomohiro Ohuchi², Katsuyoshi Michibayashi³ (1.Department of Geosciences, Faculty of Science, Shizuoka University, 2.Geodynamics Research Center, Ehime University, 3.Department of Earth and Planetary Sciences, Nagoya university)

[SCG50-P07] Stable fault slip in antigorite-olivine aggregates at high pressures

Mai Ikehara¹, *Tomoaki Kubo¹, Takuya Iwasato², Yuji Higo³, Masahiro Imamura¹, Yoshinori Tange³ (1.Kyushu University, 2.Shin-Nippon Nondestructive Inspection Co., Ltd., 3.JASRI)

[SCG50-P08] Rheology and frictional instability of lawsonite in high pressure deformation experiments

*Rei Shiraishi¹, Jun Muto¹, Akihiro Tsunoda², Sando Sawa¹, Akio Suzuki¹ (1.Department of Earth Science, Graduate School of Science, Tohoku University, 2.Earthquake Research Institute, University of Tokyo)

[SCG50-P09] Grain Size Dependency of Olivine-Spinel Phase Transformational Mechanism Responsible for Deep-focus Earthquakes

*Sando Sawa¹, Jun Muto¹, Nobuyoshi Miyajima², Hiroyuki Nagahama¹ (1.Department of Earth Science, Tohoku University, 2.Bayerisches Geoinstitut, University of Bayreuth)

[SCG50-P10] Seismicity and mineral destabilizations in the subducting mantle up to 6 GPa, 200 km depth

*Thomas P. Ferrand¹ (1.Earthquake Research Institute)

[SCG50-P11] Receiver function imaging of subducting Pacific plate and mantle wedge under Japanese islands using denser network of stations

*HyeJeong Kim¹, Hitoshi Kawakatsu¹, Takeshi Akuhara¹, Masanao Shinohara¹ (1.Earthquake Research Institute, The University of Tokyo)

[SCG50-P12] Strong S-wave attenuation in the mantle wedge beneath the NE Japan and interpretations of high-frequency wave propagation path of intraslab earthquakes

*Takahiro Shiina^1,2, Kei Katsumata², Kiyoshi Yomogida³, Aitaro Kato¹ (1.Earthquake Research Institute, The University of Tokyo, 2.Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University, 3.Graduate School of Science, Hokkaido University)

Session information