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  1. 防災科研関係論文

Dynamic rupture simulation of 2018, Hokkaido Eastern Iburi earthquake: role of non-planar geometry

https://nied-repo.bosai.go.jp/records/3111
https://nied-repo.bosai.go.jp/records/3111
f0e1ca03-315c-4b05-b143-b35d6320f500
Item type researchmap(1)
公開日 2023-10-09
タイトル
言語 ja
タイトル Dynamic rupture simulation of 2018, Hokkaido Eastern Iburi earthquake: role of non-planar geometry
タイトル
言語 en
タイトル Dynamic rupture simulation of 2018, Hokkaido Eastern Iburi earthquake: role of non-planar geometry
言語
言語 eng
著者 Tatsuya Hisakawa

× Tatsuya Hisakawa

ja Tatsuya Hisakawa

en Tatsuya Hisakawa

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Ryosuke Ando

× Ryosuke Ando

ja Ryosuke Ando

en Ryosuke Ando

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Tomoko Elizabeth Yano

× Tomoko Elizabeth Yano

ja Tomoko Elizabeth Yano

en Tomoko Elizabeth Yano

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Makoto Matsubara

× Makoto Matsubara

ja Makoto Matsubara

en Makoto Matsubara

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抄録
内容記述タイプ Other
内容記述 <title>Abstract</title>The 2018, Hokkaido Eastern Iburi, Japan, earthquake is an event characterized by complexity of the rupture process and slip pattern, which may involve both reverse and strike-slip motion depending on the locations on the fault surface. We perform dynamic rupture simulations based on simple physical laws, conditions for stressing and fault friction, and the non-planar fault geometry constrained by the aftershock observation. The complex fault geometry is numerically treated by the boundary integral equation method accelerated by the fast domain portioning method. The fault geometry is characterized primarily by the combination of six fault planes. As a result, we are able to explain several observed features of the event, including the spatial variation of the final fault slip and rupture velocity, which are inferred from the kinematic slip inversion. We also succeed in refining the constraint of the regional stress field in the focal area based on the simulation. Our results show that the overall patterns of the complex rupture event can be reproduced by a relatively simple model of the regional stress and the fault friction, if the geometrical complexity of the fault is properly taken into account.
言語 en
書誌情報 ja : Earth, Planets and Space
en : Earth, Planets and Space

巻 72, 号 1, 発行日 2020-03
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 1880-5981
DOI
関連識別子 10.1186/s40623-020-01160-y
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