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  1. 防災科研関係論文

Time-dependent model for volume changes in pressure sources at Asama volcano, central Japan due to vertical deformations detected by precise leveling during 1902?2005

https://nied-repo.bosai.go.jp/records/2801
https://nied-repo.bosai.go.jp/records/2801
946398e0-56bd-4307-b8f7-3d12750574d0
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 ja
タイトル Time-dependent model for volume changes in pressure sources at Asama volcano, central Japan due to vertical deformations detected by precise leveling during 1902?2005
タイトル
言語 en
タイトル Time-dependent model for volume changes in pressure sources at Asama volcano, central Japan due to vertical deformations detected by precise leveling during 1902-2005
言語
言語 eng
著者 M. Murase

× M. Murase

ja M. Murase

en Masayuki Murase

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K. Ono

× K. Ono

ja K. Ono

en Koji Ono

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T. Ito

× T. Ito

ja T. Ito

en Takeo Ito

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R. Miyajima

× R. Miyajima

ja R. Miyajima

en Rikio Miyajima

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H. Mori

× H. Mori

ja H. Mori

en Hitoshi Mori

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H. Aoyama

× H. Aoyama

ja H. Aoyama

en Hiroshi Aoyama

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H. Oshima

× H. Oshima

ja H. Oshima

en Hiromitu Oshima

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Y. Yoshida

× Y. Yoshida

ja Y. Yoshida

en Yuka Yoshida

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A. Terada

× A. Terada

ja A. Terada

en Akihiko Terada

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E. Koyama

× E. Koyama

ja E. Koyama

en Eturo Koyama

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T. Takeda

× T. Takeda

ja T. Takeda

en Toyotarou Takeda

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H. Watanabe

× H. Watanabe

ja H. Watanabe

en Hidefumi Watanabe

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F. Kimata

× F. Kimata

ja F. Kimata

en Fumiaki Kimata

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N. Fujii

× N. Fujii

ja N. Fujii

en Naoyuki Fujii

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抄録
内容記述タイプ Other
内容記述 A time-dependent model for volume changes in pressure sources at Asama volcano is developed from precise leveling data collected since 1902. The optimal source model is determined by comparing five different models (a model with three types of spherical sources, single dike, and dike with a spherical source) during three periods: 1935 to 1939, 1939 to 1950/1953, and 1990 to November 2004. The optimal parameters for each model are estimated by employing a genetic algorithm (GA). The model with two spherical sources was selected as the optimal model. In this model, one of the sources was estimated to be located at a depth of approximately 6 km beneath Kurofu volcano; the other source was estimated to be located close to Maekake volcano at a depth of approximately 2 km. The volume changes in the two spherical sources are calculated using the Akaike's Bayesian information criterion (ABIC) for the period from 1902 to 2005. During the period from 1902 to 1943, a large inflation was estimated in a source at a depth of approximately 6 km beneath Kurofu volcano, which is an older volcano at the base of Asama. After 1943, a rapid deflation continued until 1967. This rapid deflation changed to a marginal inflation that continued from 1967 until 2005. The temporal change in the pressure source beneath Kurofu volcano exhibits a strong positive correlation with the eruption frequency. The leveling data does not suggest a significant volume change in the source beneath Kurofu volcano during the quiet period between 1962 and 2005. During the 20th century, magma appears to have been episodically supplied beneath Asama volcano. In particular, the inflation of the source beneath Kurofu volcano, and probably the magma supply, reached a peak from 1930 to 1940. (c) 2007 Elsevier B.V. All rights reserved.
言語 en
書誌情報 ja : Journal of Volcanology and Geothermal Research
en : JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH

巻 164, 号 1-2, p. 54-75, 発行日 2007-07
出版者
言語 en
出版者 ELSEVIER SCIENCE BV
ISSN
収録物識別子タイプ ISSN
収録物識別子 0377-0273
DOI
関連識別子 10.1016/j.jvolgeores.2007.04.001
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