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  1. 防災科研関係論文

Two end-member earthquake preparations illuminated by foreshock activity on a meter-scale laboratory fault

https://nied-repo.bosai.go.jp/records/2904
https://nied-repo.bosai.go.jp/records/2904
5b3fb9d8-b429-4297-9b6e-43d4f8395013
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Two end-member earthquake preparations illuminated by foreshock activity on a meter-scale laboratory fault
言語
言語 eng
著者 Futoshi Yamashita

× Futoshi Yamashita

en Futoshi Yamashita

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Eiichi Fukuyama

× Eiichi Fukuyama

en Eiichi Fukuyama

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Shiqing Xu

× Shiqing Xu

en Shiqing Xu

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Hironori Kawakata

× Hironori Kawakata

en Hironori Kawakata

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Kazuo Mizoguchi

× Kazuo Mizoguchi

en Kazuo Mizoguchi

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Shigeru Takizawa

× Shigeru Takizawa

en Shigeru Takizawa

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抄録
内容記述タイプ Other
内容記述 <title>Abstract</title>The preparation process of natural earthquakes is still difficult to quantify and remains a subject of debate even with modern observational techniques. Here, we show that foreshock activity can shed light on understanding the earthquake preparation process based on results of meter-scale rock friction experiments. Experiments were conducted under two different fault surface conditions before each run: less heterogeneous fault without pre-existing gouge and more heterogeneous fault with pre-existing gouge. The results show that fewer foreshocks occurred along the less heterogeneous fault and were driven by preslip; in contrast, more foreshocks with a lower <italic>b</italic> value occurred along the more heterogeneous fault and showed features of cascade-up. We suggest that the fault surface condition and the stress redistribution caused by the ongoing fault slip mode control the earthquake preparation process, including the behavior of foreshock activity. Our findings imply that foreshock activity can be a key indicator for probing the fault conditions at present and in the future, and therefore useful for assessing earthquake hazard.
言語 en
書誌情報 en : Nature Communications

巻 12, 号 1, 発行日 2021-07
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 2041-1723
DOI
関連識別子 10.1038/s41467-021-24625-4
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