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  1. 防災科研関係論文

Moisture-related weakening and strengthening of a fault activated at seismic slip rates

https://nied-repo.bosai.go.jp/records/4495
https://nied-repo.bosai.go.jp/records/4495
de078f96-d4b8-4284-a666-fd455a268239
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Moisture-related weakening and strengthening of a fault activated at seismic slip rates
言語
言語 eng
著者 Kazuo Mizoguchi

× Kazuo Mizoguchi

en Kazuo Mizoguchi

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Takehiro Hirose

× Takehiro Hirose

en Takehiro Hirose

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Toshihiko Shimamoto

× Toshihiko Shimamoto

en Toshihiko Shimamoto

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Eiichi Fukuyama

× Eiichi Fukuyama

en Eiichi Fukuyama

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抄録
内容記述タイプ Other
内容記述 [1] From high-velocity friction experiments on gabbro rock at a rate of 85 mm/s, we found that a fault with a thin gouge layer experienced slip weakening with a drop of about 80% in the friction coefficient. At room humidity conditions, the fault subsequently recovered its complete strength, over an interval of several minutes after the slip terminated. The strength recovery did not occur under dry N-2 gas-saturated condition. This result can be interpreted as the interaction of moisture with gouge particles: moisture-drained weakening due to frictional heating and moisture-absorbed strengthening due to cooling. This new mechanism can cause dynamic weakening of faults, which controls earthquake rupture propagation.
言語 en
書誌情報 en : GEOPHYSICAL RESEARCH LETTERS

巻 33, 号 16
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 10.1029/2006GL026980
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