DOI: 10.1029/2012GL053995
论文题名: Deformation at depth associated with the 12 May 2008 MW 7.9 Wenchuan earthquake from seismic ambient noise monitoring
作者: Froment B. ; Campillo M. ; Chen J.H. ; Liu Q.Y.
刊名: Geophysical Research Letters
ISSN: 0094-9404
EISSN: 1944-9135
出版年: 2013
卷: 40, 期: 1 起始页码: 78
结束页码: 82
语种: 英语
Scopus关键词: Broadband station
; Comparison with measurements
; Material property
; Seismic velocities
; Sichuan Basin
; Temporal characteristics
; Temporal evolution
; Wenchuan Earthquake
; Acoustic noise
; Digital storage
; Earthquakes
; Noise pollution
; Seismic waves
; Deformation
; ambient noise
; crust-mantle boundary
; deformation mechanism
; earthquake magnitude
; seismic wave
; Sichuan earthquake 2008
; spatiotemporal analysis
; wave velocity
; China
; Sichuan Basin
; Xizang
英文摘要: We track the temporal evolution of seismic wave speed to detect changes in material properties at depth, driven by deformation associated with the 2008 Mw 7.9 Wenchuan earthquake. We analyze ambient noise correlation functions to monitor seismic wave speed variations. The data were continuously recorded during 2 years by 114 broadband stations in a region that covers the southern two thirds of the ruptured fault. We perform the analysis in the 12-to-20-s period band. By comparison with measurements in the band 1-to-3 s, we show that the seismic velocity changes cannot be explained by a shallow perturbation but are related to deformation at depth in the crust. The spatial and temporal characteristics of these variations can thus be viewed as reflecting the middle crust behavior. In particular, the results suggest that the deformation in the middle crust is different beneath Tibet and the Sichuan basin. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874854889&doi=10.1029%2f2012GL053995&partnerID=40&md5=479d98c6f3dcfad29e6f16ebe11947ac
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6668
Appears in Collections: 气候减缓与适应
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作者单位: ISTerre, Université de Grenoble 1, CNRS, Grenoble, France
Recommended Citation:
Froment B.,Campillo M.,Chen J.H.,et al. Deformation at depth associated with the 12 May 2008 MW 7.9 Wenchuan earthquake from seismic ambient noise monitoring[J]. Geophysical Research Letters,2013-01-01,40(1).