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  1. 防災科研関係論文

Modeling short- and long-term slow slip events in the seismic cycles of large subduction earthquakes

https://nied-repo.bosai.go.jp/records/2854
https://nied-repo.bosai.go.jp/records/2854
e128e9ac-81c7-44f8-a6c2-51fd6e534bb8
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Modeling short- and long-term slow slip events in the seismic cycles of large subduction earthquakes
言語
言語 eng
著者 Takanori Matsuzawa

× Takanori Matsuzawa

en Takanori Matsuzawa

Search repository
Hitoshi Hirose

× Hitoshi Hirose

en Hitoshi Hirose

Search repository
Bunichiro Shibazaki

× Bunichiro Shibazaki

en Bunichiro Shibazaki

Search repository
Kazushige Obara

× Kazushige Obara

en Kazushige Obara

Search repository
抄録
内容記述タイプ Other
内容記述 Slow slip events (SSEs) occur in the deeper extents of areas where large interplate earthquakes are expected in subduction zones, such as the Nankai region of Japan and the Cascadia region of North America. In the Nankai region, SSEs are divided into long- and short-term SSEs, depending on their duration and recurrence interval. We modeled and examined the occurrence of long- and short-term SSEs and changes in their behavior during the seismic cycles of large interplate earthquakes. In these numerical simulations we adopted a rate- and state-dependent friction law with cutoff velocities and assumed that the distribution of pore fluid controls the recurrence interval of both long- and short-term SSEs. The recurrence intervals of reproduced short-term SSEs decrease during a long-term SSE, as observed in western Shikoku, in the Nankai region. The recurrence intervals of both types of SSEs become shorter in the later stages of interseismic periods. Large interplate earthquakes nucleate between the region where SSEs occur and the locked region of the large earthquakes, as suggested from observations of the 1944 Tonankai earthquake. Our numerical results suggest that the stress buildup process in a seismic cycle affects the recurrence behavior of SSEs. Copyright 2010 by the American Geophysical Union.
言語 en
書誌情報 en : Journal of Geophysical Research: Solid Earth

巻 115, 号 12, 発行日 2010-12-01
出版者
言語 en
出版者 Blackwell Publishing Ltd
ISSN
収録物識別子タイプ EISSN
収録物識別子 2169-9356
DOI
関連識別子 10.1029/2010JB007566
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