[S-CG39] Science of slow earthquakes: Toward unified understandings of whole earthquake process

Sat. Jun 5, 2021 10:45 AM - 12:15 PM Ch.21 (Zoom Room 21)

convener:Satoshi Ide(Department of Earth an Planetary Science, University of Tokyo), Hitoshi Hirose(Research Center for Urban Safety and Security, Kobe University), Kohtaro Ujiie(Faculty of Life and Environmental Sciences, University of Tsukuba), Takahiro Hatano(Department of Earth and Space Science, Osaka University), Chairperson:Kohtaro Ujiie(Faculty of Life and Environmental Sciences, University of Tsukuba)

Accumulating observational studies on various types of slow deformation events, such as tectonic tremors, very low frequency events, and slow slip events, portrays some universal characteristics in generally complex behavior, including interaction among events and influence by various outer loading. Some of these phenomena seem to have causal relation with the occurrence of very large earthquakes. A unified understanding of these slow and fast earthquake processes requires an approach integrating geophysics, seismology, geodesy, geology, and non-equilibrium statistical physics. We welcome presentations based on, but not limited to, geophysical observation, data analysis, analytical theory, numerical simulation, field study, and laboratory experiments.

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10:45 AM - 11:00 AM

[SCG39-01] The stabilizing effect of pore-fluid pressure along subduction megathrust faults: Evidence from experiments on Nankai Trough sediments

*John D Bedford^1,2, Daniel R Faulkner², Michael J Allen², Takehiro Hirose¹ (1.JAMSTEC, 2.Univ. of Liverpool)

11:00 AM - 11:15 AM

[SCG39-02] Depth-dependent deep-slow earthquakes controlled by temperature dependence of brittle-ductile transitional rheology

*Ryosuke Ando¹, Kohtaro Ujiie², Naoki Nishiyama², Yasushi Mori³ (1.Graduate School of Science, University of Tokyo, 2.Graduate School of Life and Environmental Sciences, University of Tsukuba, 3.Kitakyushu Museum of Natural History and Human History)

11:15 AM - 11:30 AM

[SCG39-03] Localized megathrust slip controlled by chemical reactions in subduction mélanges

*Kohtaro Ujiie¹, Kazuya Noro², Norio Shigematsu³, Ake Fagereng⁴, Naoki Nishiyama¹, Christopher Tulley⁴, Haruna Masuyama², Yasushi Mori⁵ (1.Faculty of Life and Environmental Sciences, University of Tsukuba, 2.Graduate School of Life and Environmental Sciences, University of Tsukuba, 3.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 4.School of Earth and Environmental Sciences, Cardiff University, 5.Kitakyushu Museum of Natural History and Human Histor)

11:30 AM - 11:45 AM

[SCG39-04] Lithological heterogeneity and fluid flow related to seamount subduction: an exhumed example from Amami-Oshima Island

*Madison Frank¹, Ginta Motohashi¹, Kohtaro Ujiie² (1.Graduate School of Life and Environmental Sciences, University of Tsukuba, 2.Faculty of Life and Environmental Sciences, University of Tsukuba)

11:45 AM - 12:00 PM

[SCG39-05] Constraints on silica transport along subduction boundaries based on volume change estimates of metamorphic rocks

*Shogo Soejima¹, Simon Richard Wallis¹ (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo)

12:00 PM - 12:15 PM

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