[S-CG48] Science of slow earthquakes: Toward unified understandings of whole earthquake process

Thu. May 30, 2019 10:45 AM - 12:15 PM Convention Hall A (2F)

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(Graduate School of Life and Environmental Sciences, University of Tsukuba), Takahiro Hatano(Earthquake Research Institute, University of Tokyo), Chairperson:Kohtaro Ujiie(Graduate School of Life and Environmental Sciences, University of Tsukuba), Simon Wallis(Nagoya University)

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 loadings. 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

[SCG48-22] Short fluid infiltration events in the low permeable metamorphic rocks triggered by crustal fracturing at amphibolite–granulite facies conditions

*Diana Mindaleva¹, Masaoki Uno¹, Fumiko Higashino¹, Atsushi Okamoto¹, Noriyoshi Tsuchiya¹ (1.Graduate school of environmental studies, Tohoku University)

11:00 AM - 11:15 AM

[SCG48-23] Generation of high fluid pressure at the base of the shallow mantle wedge—evidence from serpentinite of the Sanbagawa belt, SW Japan

*Simon Richard Wallis¹, Yui Kouketsu², Mari Yokota^1,2 (1.University of Tokyo, 2.Nagoya University)

11:15 AM - 11:30 AM

[SCG48-24] Overpressured subduction plate boundary caused by infiltration of mantle-derived fluids: Evidence from helium isotope analysis on veins in subduction mélange

*Naoki Nishiyama¹, Kohtaro Ujiie¹, Hirochika Sumino² (1.University of Tsukuba, 2.The University of Tokyo)

11:30 AM - 11:45 AM

[SCG48-25] Geological and rheological conditions of subduction plate boundary between the seismogenic zone and the ETS zone in warm-slab environments

*Kohtaro Ujiie¹, Kazuya Noro¹, Norio Shigematsu², Ake Fagereng³, Naoki Nishiyama¹, Christopher Tulley³, Haruna MASUYAMA¹, Yasushi Mori⁴ (1.Graduate School of Life and Environmental Sciences, University of Tsukuba, 2.Research Institute of Earthquake and Volcano Geology, National Institute of Advanced Industrial Science and Technology, Japan, 3.Cardiff University, 4.Kitakyushu Museum of Natural History and Human History)

11:45 AM - 12:00 PM

[SCG48-26] Temperature variation in tectonic mélanges of the Shimanto Belt, SW Japan

*Tsai-Wei Chen¹, Donald M Fisher¹, Andrew J Smye¹, Yoshitaka Hashimoto² (1.Penn State Univ., 2.Kochi Univ.)

12:00 PM - 12:15 PM

[SCG48-27] Frictional properties of opal gouge at low-temperature hydrothermal conditions and their implications for seismogenic faulting along subduction-zone megathrusts

*Kyuichi Kanagawa¹, Tomoya Nakanishi², Morito Kuwana³, Michiyo Sawai¹, Takehiro Hirose⁴ (1.School of Science, Chiba University, 2.Graduate School of Science and Engineering, Chiba University, 3.Faculty of Science, Chiba University, 4.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)

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