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  1. 防災科研関係論文

Geomagnetic changes associated with the dike intrusion during the 2000 Miyakejima eruptive activity, Japan

https://nied-repo.bosai.go.jp/records/4261
https://nied-repo.bosai.go.jp/records/4261
a7a7a614-6630-41d4-a4f2-b6edac8787d1
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Geomagnetic changes associated with the dike intrusion during the 2000 Miyakejima eruptive activity, Japan
著者 Hideki Ueda

× Hideki Ueda

en Hideki Ueda

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Takumi Matsumoto

× Takumi Matsumoto

en Takumi Matsumoto

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Eisuke Fujita

× Eisuke Fujita

en Eisuke Fujita

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Motoo Ukawa

× Motoo Ukawa

en Motoo Ukawa

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Eiji Yamamoto

× Eiji Yamamoto

en Eiji Yamamoto

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Yoichi Sasai

× Yoichi Sasai

en Yoichi Sasai

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Meilano Irwan

× Meilano Irwan

en Meilano Irwan

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Fumiaki Kimata

× Fumiaki Kimata

en Fumiaki Kimata

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抄録
内容記述タイプ Other
内容記述 A marked magnetic field change exceeding 200 nT was detected by a three-component magnetometer at the beginning of the 2000 Miyakejima eruptive activity. The change in the magnetic field is correlated with an earthquake activity and crustal deformation, which indicate a dike intrusion very close to the observation site. A dike model based on the crustal deformation data shows that the primary cause of the magnetic change was the piezomagnetic effect associated with the dike emplacement, and that the other potential factors, including thermal and electrokinetic effects, were unlikely to be its principal cause. We obtained a new dike model by combining both the crustal deformation and the magnetic field change, which is sensitive to the strong stress changes near the edges of dike. The new dike model shows lateral and upward propagation of the dike during its intrusion, and suggests that shallow cracks induced by the dike intrusion near the ground surface contributed to the changes seen in the magnetic field. © 2006 Elsevier B.V. All rights reserved.
言語 en
書誌情報 en : Earth and Planetary Science Letters

巻 245, 号 1-2, p. 416-426
ISSN
収録物識別子タイプ ISSN
収録物識別子 0012-821X
DOI
関連識別子 10.1016/j.epsl.2006.02.036
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