干旱区生态环境知识资源中心(Arid): Shallow Crustal Shear Velocity and Vp/Vs Across Southern California: Joint Inversion of Short-Period Rayleigh Wave Ellipticity, Phase Velocity, and Teleseismic Receiver Functions

Arid

DOI	10.1029/2021GL092626
	Shallow Crustal Shear Velocity and Vp/Vs Across Southern California: Joint Inversion of Short-Period Rayleigh Wave Ellipticity, Phase Velocity, and Teleseismic Receiver Functions
	Berg, Elizabeth M.; Lin, Fan-Chi; Schulte-Pelkum, Vera; Allam, Amir; Qiu, Hongrui; Gkogkas, Konstantinos
通讯作者	Berg, EM (corresponding author), Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA.
来源期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2021
卷号	48 期号:15
英文摘要	Near-surface seismic velocity structure plays a critical role in ground motion amplification during large earthquakes. In particular, the local Vp/Vs ratio strongly influences the amplitude of Rayleigh waves. Previous studies have separately imaged 3D seismic velocity and Vp/Vs ratio at seismogenic depth, but lack regional coverage and/or fail to constrain the shallowest structure. Here, we combine three datasets with complementary sensitivity in a Bayesian joint inversion for shallow crustal shear velocity and near-surface Vp/Vs ratio across Southern California. Receiver functions-including with an apparent delayed initial peak in sedimentary basins, and long considered a nuisance in receiver function imaging studies-highly correlate with short-period Rayleigh wave ellipticity measurements and require the inclusion of a Vp/Vs parameter. The updated model includes near-surface low shear velocity more in line with geotechnical layer estimates, and generally lower than expected Vp/Vs outside the basins suggesting widespread shallow fracturing and/or groundwater undersaturation.
英文关键词	Markov Chain Monte Carlo Bayesian Vp Vs Rayleigh receiver function Vs
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000683512200005
WOS关键词	LOS-ANGELES BASIN ; POISSONS RATIO ; PLATE-BOUNDARY ; SEISMIC VELOCITIES ; SIERRA-NEVADA ; AMBIENT NOISE ; MOJAVE DESERT ; FAULT ZONES ; V-P ; TOMOGRAPHY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363430
作者单位	[Berg, Elizabeth M.; Lin, Fan-Chi; Allam, Amir; Gkogkas, Konstantinos] Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA; [Schulte-Pelkum, Vera] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; [Schulte-Pelkum, Vera] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA; [Qiu, Hongrui] Rice Univ, Dept Earth Environm & Planetary Sci, Houston, TX USA
推荐引用方式 GB/T 7714	Berg, Elizabeth M.,Lin, Fan-Chi,Schulte-Pelkum, Vera,et al. Shallow Crustal Shear Velocity and Vp/Vs Across Southern California: Joint Inversion of Short-Period Rayleigh Wave Ellipticity, Phase Velocity, and Teleseismic Receiver Functions[J],2021,48(15).
APA	Berg, Elizabeth M.,Lin, Fan-Chi,Schulte-Pelkum, Vera,Allam, Amir,Qiu, Hongrui,&Gkogkas, Konstantinos.(2021).Shallow Crustal Shear Velocity and Vp/Vs Across Southern California: Joint Inversion of Short-Period Rayleigh Wave Ellipticity, Phase Velocity, and Teleseismic Receiver Functions.GEOPHYSICAL RESEARCH LETTERS,48(15).
MLA	Berg, Elizabeth M.,et al."Shallow Crustal Shear Velocity and Vp/Vs Across Southern California: Joint Inversion of Short-Period Rayleigh Wave Ellipticity, Phase Velocity, and Teleseismic Receiver Functions".GEOPHYSICAL RESEARCH LETTERS 48.15(2021).