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  1. 防災科研関係論文

Influence of crustal lithology and the thermal state on microseismicity in the Wakayama region, southern Honshu, Japan

https://nied-repo.bosai.go.jp/records/5097
https://nied-repo.bosai.go.jp/records/5097
204754a6-2829-42b0-b272-c08431e3890e
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Influence of crustal lithology and the thermal state on microseismicity in the Wakayama region, southern Honshu, Japan
著者 Sumire Maeda

× Sumire Maeda

en Sumire Maeda

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Shinji Toda

× Shinji Toda

en Shinji Toda

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Toru Matsuzawa

× Toru Matsuzawa

en Toru Matsuzawa

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Makoto Otsubo

× Makoto Otsubo

en Makoto Otsubo

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Takumi Matsumoto

× Takumi Matsumoto

en Takumi Matsumoto

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抄録
内容記述タイプ Other
内容記述 <title>Abstract</title>Here we investigate the influence of the lithology and thermal state of the upper crust on earthquake distributions beneath the Wakayama region, southern Honshu, Japan, to better understand the influence of crustal conditions on regional seismogenesis. The earthquakes are concentrated in the deeper sections of mafic belts and shallower sections of pelitic belts, based on a comparison of relocated hypocenters and estimated subsurface geological structures. We compare the frictional properties of pelitic rocks and basalt, as obtained from petrological experiments, with the hypocenter depth distributions in pelitic and mafic belts to assess the control of crustal lithology on the depth extent of regional seismicity. The earthquake distributions are consistent with the temperature ranges over which the respective rock types are expected to exhibit a velocity-weakening behavior, based on the petrological experiments. The results suggest that the occurrence of shallow intraplate earthquakes is controlled by the temperature- and lithology-dependent friction of the upper crust.
言語 en
書誌情報 en : Earth, Planets and Space

巻 73, 号 1
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/s40623-021-01503-3
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