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  1. 防災科研関係論文

Stress transfer in the Tokai subduction zone from the 2009 Suruga Bay earthquake in Japan

https://nied-repo.bosai.go.jp/records/2903
https://nied-repo.bosai.go.jp/records/2903
65e66ed0-1033-4662-8d35-f5aa4b88d7da
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Stress transfer in the Tokai subduction zone from the 2009 Suruga Bay earthquake in Japan
言語
言語 eng
著者 S. Aoi

× S. Aoi

en S. Aoi

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B. Enescu

× B. Enescu

en B. Enescu

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W. Suzuki

× W. Suzuki

en W. Suzuki

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Y. Asano

× Y. Asano

en Y. Asano

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K. Obara

× K. Obara

en K. Obara

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T. Kunugi

× T. Kunugi

en T. Kunugi

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K. Shiomi

× K. Shiomi

en K. Shiomi

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抄録
内容記述タイプ Other
内容記述 Southwestern Japan lies at the boundary between the subducting Philippine Sea plate and the overriding Eurasian plate. A magnitude 8 megathrust earthquake ruptured the Tonankai and Nankai segments in 1944 and 1946, respectively, but the neighbouring Tokai segment of the plate boundary remained locked(1). A large megathrust earthquake in the Tokai region has therefore been expected. In 2009, a magnitude 6.4 earthquake took place in Suruga Bay, within the Philippine Sea subducting plate, close to the Tokai segment. Here, we use a fault-slip model to examine the impact of the stress changes(2) caused by the Suruga Bay event on the Tokai segment. We show that the occurrence rate of plate-boundary seismicity increased following the earthquake. Most of the presumed strongly locked patches of the Tokai segment are located within areas of increased stress. Rupturing of a locked patch-following a threshold level of seismic stress-could trigger the rupture of the entire Tokai segment, leading to a megathrust earthquake.
言語 en
書誌情報 en : Nature Geoscience

巻 3, 号 7, p. 496-500, 発行日 2010-06-20
出版者
言語 en
出版者 Springer Science and Business Media LLC
ISSN
収録物識別子タイプ EISSN
収録物識別子 1752-0908
DOI
関連識別子 10.1038/ngeo885
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