Shallow hydrothermal reservoir inferred from post-eruptive deflation at Ontake Volcano as revealed by PALSAR-2 InSAR
Shallow hydrothermal reservoir inferred from post-eruptive deflation at Ontake Volcano as revealed by PALSAR-2 InSAR
复制标题
PALSAR-2 InSAR 揭示的 Ontake 火山喷发后紧缩推断浅层热液储层
DOI:
10.1186/s40623-018-0966-6
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
M. Murakami
中科院分区:
文献类型:
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作者:
Shohei Narita;M. Murakami
In 2014, a phreatic eruption occurred at the Ontake Volcano in Central Japan causing multiple deaths and missing persons. Interferometric Synthetic Aperture Radar data showed local-scale subsidence around the newly created eruptive vents after the eruption. Source modeling resulted in a nearly spherical deflation source emplaced at a depth of 500 m below the vents reflecting post-eruptive depressurization in a shallow hydrothermal reservoir. The cumulative deflation volume reached 7 × 105 m3 3 years after the eruption. Comparison between our source model and GNSS data indicates that this shallow reservoir could have formed by 2007 and remained stable until the 2014 eruption. The absence of significant syn-eruptive subsidence indicates that the shallow reservoir was not the main water source driving the phreatic eruption. Under simple assumptions, mass balance between the shallow reservoir and the discharge plume from the vents indicates most of the water contained in the plume comes from greater depth than the shallow reservoir. To constrain the post-eruptive process, it is necessary to track not only deformation but also plume discharge for 3 years after the eruption.
影响因子:
3
作者:
Y. Okada
通讯作者:
Y. Okada
DOI:
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发表时间:
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期刊:
影响因子:
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作者:
通讯作者:
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DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
Choong Geun Lee;V. G. Moshnyaga and K. Hashimoto;宮田康治
通讯作者:
宮田康治