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  1. D300 大学院環境学研究科
  2. D300a 雑誌掲載論文
  3. 学術雑誌

Elastic strain energy and pore-fluid pressure control of aftershocks

http://hdl.handle.net/2237/00032616
http://hdl.handle.net/2237/00032616
6608fcec-b731-4924-839f-bed0a2d25d6c
名前 / ファイル ライセンス アクション
EPSL_TMN2019_rev_final.pdf EPSL_TMN2019_rev_final (2.5 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-09-09
タイトル
タイトル Elastic strain energy and pore-fluid pressure control of aftershocks
言語 en
著者 Terakawa, Toshiko

× Terakawa, Toshiko

WEKO 101152

en Terakawa, Toshiko

Search repository
Matsu'ura, Mitsuhiro

× Matsu'ura, Mitsuhiro

WEKO 101153

en Matsu'ura, Mitsuhiro

Search repository
Noda, Akemi

× Noda, Akemi

WEKO 101154

en Noda, Akemi

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
キーワード
主題Scheme Other
主題 elastic strain energy
キーワード
主題Scheme Other
主題 earthquake generation
キーワード
主題Scheme Other
主題 background stress
キーワード
主題Scheme Other
主題 pore-fluid pressure
キーワード
主題Scheme Other
主題 Landers earthquake
キーワード
主題Scheme Other
主題 ROC analysis
抄録
内容記述 Aftershocks are well-known, however their triggering mechanisms remain unclear. The Coulomb failure stress change (ΔCFS) has been widely implemented to understand the spatial distribution of aftershocks. Here we propose a new metric for evaluating aftershock generation based on the energetics of shear faulting in a prestressed state. Unlike ΔCFS, the new metric depends not only on coseismic stress changes but also on background crustal stresses. The energetics-based formulation expands the ΔCFS defined on a specific plane into a generalized failure stress defined in a three-dimensional space. We examined the diagnostic ability of the new metric by applying receiver operating characteristic analysis to 12,175 aftershocks (M≥0) that followed the 1992 Landers earthquake. With a realistic background stress field inferred from thousands of earthquake focal mechanisms, the new metric was able to discriminate the triggering mechanisms of the aftershocks: two-thirds were direct responses to coseismic stress changes and one-fifth resulted from strength decreases owing to pore-fluid pressure increases.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 ファイル公開:2022-04-01
言語 ja
内容記述タイプ Other
出版者
言語 en
出版者 Elsevier
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1016/j.epsl.2020.116103
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0012-821X
書誌情報 en : Earth and Planetary Science Letters

巻 535, p. 116103, 発行日 2020-04-01
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