DOI: 10.1016/j.epsl.2018.03.041
Scopus记录号: 2-s2.0-85044925258
论文题名: First detection of precursory ground inflation of a small phreatic eruption by InSAR
作者: Kobayashi T. ; Morishita Y. ; Munekane H.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 491 起始页码: 244
结束页码: 254
语种: 英语
英文关键词: Hakone-Owakudani
; phreatic eruption
; precursory ground inflation
; SAR
Scopus关键词: Deformation
; Sea level
; Volcanoes
; Deformation speed
; Hakone-Owakudani
; High spatial resolution
; Hydrothermal activity
; Interferometric synthetic aperture radars
; Phreatic
; precursory ground inflation
; Subsurface pressure
; Synthetic aperture radar
; deformation
; hydrothermal activity
; interferometry
; synthetic aperture radar
; uplift
; volcanic eruption
; Hakone Volcano
; Honshu
; Japan
; Kanagawa
; Kanto
英文摘要: Phreatic eruptions are caused by pressurization of geothermal fluid sources at shallow levels. They are relatively small compared to typical magmatic eruptions, but can be very hazardous. However, owing to their small magnitudes, their occurrences are difficult to predict. Here we show the detection of locally distributed ground inflation preceding a small phreatic eruption at the Hakone volcano, Japan, through the application of interferometric synthetic aperture radar analysis. The ground inflation proceeded the eruption at slow speed of ∼5 mm/month with a spatial size of ∼200 m in the early stage, and then it accelerated 2 months before the eruption that occurred for the first time in 800–900 yrs. The ground uplift reached ∼30 cm, and the eruption occurred nearby the most deformed part. The deformation speed correlated well with inflation of spherical source located at 4.8 km below sea level, thus suggesting that heat and/or volcanic fluid supply from the spherical source, maybe magma reservoir, directly drove the subsurface hydrothermal activity. Our results demonstrate that high-spatial-resolution deformation data can be a good indicator of subsurface pressure conditions with pinpoint spatial accuracy during the preparatory process of phreatic eruptions. © 2018 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109921
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Geospatial Information Authority of Japan, Kitasato-1, Tsukuba, Ibaraki 305-0811, Japan
Recommended Citation:
Kobayashi T.,Morishita Y.,Munekane H.. First detection of precursory ground inflation of a small phreatic eruption by InSAR[J]. Earth and Planetary Science Letters,2018-01-01,491