DOI: 10.1002/2014GL062362
论文题名: Upper crustal azimuthal anisotropy across the contiguous U.S. determined by Rayleigh wave ellipticity
作者: Lin F.-C. ; Schmandt B.
刊名: Geophysical Research Letters
ISSN: 0094-9524
EISSN: 1944-9255
出版年: 2014
卷: 41, 期: 23 起始页码: 8301
结束页码: 8307
语种: 英语
英文关键词: ambient noise
; anisotropy
; Rayleigh wave H/V ratio
; stress
; upper crust
; USArray
Scopus关键词: Acoustic noise
; Rayleigh waves
; Seismology
; Stresses
; Ambient noise
; Azimuthal anisotropy
; Cross correlations
; Geological features
; H/V ratio
; Seismic anisotropy
; Upper crust
; USArray
; Anisotropy
; ambient noise
; correlation
; ellipse
; Rayleigh wave
; seismic anisotropy
; stress field
; upper crust
; United States
英文摘要: Constraints on upper crustal seismic anisotropy provide insight into the local stress orientation and structural fabric, but such constraints are scarce except in areas with dense recordings of local seismicity. We investigate directionally dependent Rayleigh wave ellipticity, or Rayleigh wave H/V (horizontal to vertical) amplitude ratios, between 8 and 20 s period across USArray to infer azimuthal anisotropy in the upper crust across the contiguous U.S. To determine the H/V ratios, we use all available multicomponent ambient noise cross correlations between all USArray stations operating between 2007 and 2013. In many locations, the observed H/V ratios are clearly back azimuth dependent with a 180- periodicity, which allows the fast directions and amplitudes of upper crustal anisotropy to be determined. The observed patterns of anisotropy correlate well with both near-surface geological features (e.g., the Intermountain Seismic Belt and Appalachian-Ouachita collision belt) and a previous stress model. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921559194&doi=10.1002%2f2014GL062362&partnerID=40&md5=6fe3db66ea5579d40a8ece92e8084961
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6788
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, United States
Recommended Citation:
Lin F.-C.,Schmandt B.. Upper crustal azimuthal anisotropy across the contiguous U.S. determined by Rayleigh wave ellipticity[J]. Geophysical Research Letters,2014-01-01,41(23).