Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2016 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : SYM-1
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Symposium
JFAST for understanding of huge tsunamigenic slip during Tohoku-Oki earthquake
*Kohtaro Ujiie
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Abstract

The Japan Trench Fast Drilling Project (JFAST) demonstrated that the shallow plate boundary fault was weak during the 2011 Mw 9.0 Tohoku-Oki earthquake. This conclusion is derived from: (1) the high fraction of smectite in the fault, (2) high-velocity friction experiments on fault material showing low shear resistance, (3) the low temperature anomaly on the fault, and (4) the decreased in situ horizontal stress in the frontal prism above the fault.

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© 2016 Japan Association of Mineralogical Sciences
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