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Volcanic magma reservoir imaged as a low-density body beneath Aso volcano that terminated the 2016 Kumamoto earthquake rupture
http://hdl.handle.net/2241/00145132
http://hdl.handle.net/2241/0014513235c933b5-c9e4-4030-8c2d-899afd5576c9
名前 / ファイル | ライセンス | アクション |
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EPS_68-208 (2.2 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2017-01-31 | |||||
タイトル | ||||||
タイトル | Volcanic magma reservoir imaged as a low-density body beneath Aso volcano that terminated the 2016 Kumamoto earthquake rupture | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Miyakawa, Ayumu
× Miyakawa, Ayumu× Sumita, Tatsuya× Okubo, Yasukuni× Okuwaki, Ryo× Otsubo, Makoto× Uesawa, Shimpei× Yagi, Yuji |
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著者別名 |
八木, 勇治
× 八木, 勇治 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We resolve the density structure of a possible magma reservoir beneath Aso, an active volcano on Kyushu Island, Japan, by inverting gravity data. In the context of the resolved structure, we discuss the relationship between the fault rupture of the 2016 Kumamoto earthquake and Aso volcano. Low-density bodies were resolved beneath central Aso volcano using a three-dimensional inversion with an assumed density contrast of ±0.3 g/cm3. The resultant location of the southern low-density body is onsistent with a magma reservoir reported in previous studies. No Kumamoto aftershocks occur in the southern low-density body; this aseismic anomaly may indicate a ductile feature due to high temperatures and/or the presence of partial melt. Comparisons of the location of the southern low-density body with rupture models of the mainshock, obtained from teleseismic waveform and InSAR data, suggest that the rupture terminus overlaps the southern low-density body. The ductile features of a magma reservoir could have terminated rupture propagation. On the other hand, a northern low-density body is resolved in the Asodani area, where evidence of current volcanic activity is scarce and aftershock activity is high. The northern low-density body might, therefore, be derived from a thick caldera fill in the Asodani area, or correspond to mush magma or a high-crystallinity magma reservoir that could be the remnant of an ancient intrusion. | |||||
書誌情報 |
Earth, planets and space 巻 68, p. 208, 発行日 2016-12 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1880-5981 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1186/s40623-016-0582-2 | |||||
権利 | ||||||
権利情報 | © The Author(s) 2016. | |||||
権利 | ||||||
権利情報 | This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | Springer |