DOI: 10.1002/2015GL064835
论文题名: Improved detection of preeruptive seismic velocity drops at the Piton de la Fournaise volcano
作者: Rivet D. ; Brenguier F. ; Cappa F.
刊名: Geophysical Research Letters
ISSN: 0094-8629
EISSN: 1944-8360
出版年: 2015
卷: 42, 期: 15 起始页码: 6332
结束页码: 6339
语种: 英语
英文关键词: fluid pressure changes
; Piton de la Fournaise volcano
; seismic velocity changes
; volcano monitoring
; volcano seismology
Scopus关键词: Drops
; Pore pressure
; Rain
; Seismic waves
; Velocity
; Volcanoes
; Fluid pressures
; Piton de la Fournaise volcano
; Seismic velocities
; Volcano monitoring
; Volcano seismology
; Seismology
; detection method
; fluid pressure
; pore pressure
; prediction
; rainfall
; seismic noise
; seismic velocity
; seismology
; transfer function
; volcanic eruption
; Mascarene Islands
; Piton de la Fournaise
; Reunion
英文摘要: The unexpected 2014 and 2015 Ontake (Japan) and Calbuco (Chile) eruptions proved that improving volcanic eruption prediction is still a great challenge. Decreases of seismic velocities of the Piton de la Fournaise volcano inferred from seismic noise correlations have been shown to precede eruptions. However, seismic velocities are strongly influenced by rainfall and subsequent pore pressure perturbations. Here we increase the detection of precursory seismic velocity changes to an eruption by removing the effects of pore pressure changes. During 2011-2013, the volcano exhibits a low eruptive activity during which we observe seismic velocity variations well correlated with rainfall episodes. We estimated the transfer function between fluid pressure and seismic velocity changes. We use these results to correct seismic velocity change time series for pore pressure changes, due to rainfall and found a preeruptive velocity drop (0.15%) associated with the 21 June 2014 eruption that was undetected before correction. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940118290&doi=10.1002%2f2015GL064835&partnerID=40&md5=0ddd31768d1dfb64a68b8838c84f5721
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8245
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Géoazur, Université Nice Sophia Antipolis, Campus Azur, Sophia-Antipolis, France
Recommended Citation:
Rivet D.,Brenguier F.,Cappa F.. Improved detection of preeruptive seismic velocity drops at the Piton de la Fournaise volcano[J]. Geophysical Research Letters,2015-01-01,42(15).