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  1. 防災科研関係論文

Temporal variation of the Shinmoe-dake crater in the 2011 eruption revealed by spaceborne SAR observations

https://nied-repo.bosai.go.jp/records/3931
https://nied-repo.bosai.go.jp/records/3931
687d3356-a820-4fbd-b634-8c3e2b13e528
Item type researchmap(1)
公開日 2023-04-27
タイトル
言語 ja
タイトル Temporal variation of the Shinmoe-dake crater in the 2011 eruption revealed by spaceborne SAR observations
タイトル
言語 en
タイトル Temporal variation of the Shinmoe-dake crater in the 2011 eruption revealed by spaceborne SAR observations
言語
言語 eng
著者 T. Ozawa

× T. Ozawa

ja T. Ozawa

en T. Ozawa

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T. Kozono

× T. Kozono

ja T. Kozono

en T. Kozono

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抄録
内容記述タイプ Other
内容記述 SAR observations to investigate the 2011 Shinmoe-dake eruption were carried out using several SAR satellites. We detected temporal variations of the Shinmoe-dake crater in the SAR images. A convex shape appeared in the PALSAR image acquired on January 27, but it is unclear whether this shape indicates a lava dome. A larger convex shape that does indicate a lava dome could be identified in SAR images acquired after that, and it seems to have grown progressively. Estimating topography so that the simulated intensity image corresponds to the acquired one, we estimated that the lava dome grew from the morning of January 29 until January 31 with a constant effusion rate of 88.7 m(3)/sec. The lava volume of 15 million m(3) estimated from the TerraSAR-X image of February 1 was consistent with that of airborne SAR observation within 20% of its volume. From the estimated lava effusion rate and lava-covered area, we estimated that lava viscosity was less than 2.1 GPa.s, suggesting the potential to form a lava flow. Furthermore, we corrected the foreshortening distortion using the estimated topography and suggested that the lava effusion point was around the crater lake.
言語 en
書誌情報 en : Earth, Planets and Space

巻 65, 号 6, p. 527-537, 発行日 2013-07
出版者
言語 en
出版者 TERRA SCIENTIFIC PUBL CO
ISSN
収録物識別子タイプ ISSN
収録物識別子 1343-8832
DOI
関連識別子 10.5047/eps.2013.05.004
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