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  1. 防災科研関係論文

3D modeling of the cycle of a great Tohoku-oki earthquake, considering frictional behavior at low to high slip velocities

https://nied-repo.bosai.go.jp/records/4550
https://nied-repo.bosai.go.jp/records/4550
4d39c03c-4066-43c4-b43d-a56a868ce00f
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル 3D modeling of the cycle of a great Tohoku-oki earthquake, considering frictional behavior at low to high slip velocities
言語
言語 eng
著者 B. Shibazaki

× B. Shibazaki

en B. Shibazaki

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T. Matsuzawa

× T. Matsuzawa

en T. Matsuzawa

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A. Tsutsumi

× A. Tsutsumi

en A. Tsutsumi

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K. Ujiie

× K. Ujiie

en K. Ujiie

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A. Hasegawa

× A. Hasegawa

en A. Hasegawa

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Y. Ito

× Y. Ito

en Y. Ito

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抄録
内容記述タイプ Other
内容記述 We perform 3D quasi-dynamic modeling of the cycle of a megathrust earthquake in the offshore Tohoku region, Japan, using a rate- and state-dependent friction law with two state variables that exhibits strong velocity weakening at high slip velocities. We set several asperities where velocity weakening occurs at low to intermediate slip velocities. Outside of the asperities, velocity strengthening occurs at low to intermediate slip velocities. At high slip velocities, strong velocity weakening with large displacements occurs both within and outside of the asperities. The rupture of asperities occurs at intervals of several tens of years, whereas megathrust events occur at much longer intervals (several hundred years). Megathrust slips occur even in regions where velocity strengthening occurs at low to intermediate slip velocities, but where velocity weakening is dominant at high slip velocities. The proposed model explains that megathrust earthquakes occur in the same subduction zone as large thrust earthquakes. Citation: Shibazaki, B., T. Matsuzawa, A. Tsutsumi, K. Ujiie, A. Hasegawa, and Y. Ito (2011), 3D modeling of the cycle of a great Tohoku-oki earthquake, considering frictional behavior at low to high slip velocities, Geophys. Res. Lett., 38, L21305, doi:10.1029/2011GL049308.
言語 en
書誌情報 en : GEOPHYSICAL RESEARCH LETTERS

巻 38, 発行日 2011-11
出版者
言語 en
出版者 AMER GEOPHYSICAL UNION
ISSN
収録物識別子タイプ ISSN
収録物識別子 0094-8276
DOI
関連識別子 10.1029/2011GL049308
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