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

doi:10.1029/2021gl092626

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Shallow Crustal Shear Velocity and Vp/Vs Across Southern California: Joint Inversion of Short‐Period Rayleigh Wave Ellipticity, Phase Velocity, and Teleseismic Receiver Functions

2021
By Berg, Elizabeth M. ; Lin, Fan‐Chi ; Schulte‐Pelkum, Vera ; ...
Source: Geophysical Research Letters, 48(15)

[PDF-3.48 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Berg, Elizabeth M. ; Lin, Fan‐Chi ; Schulte‐Pelkum, Vera ; Allam, Amir ; Qiu, Hongrui ; ... More +

Berg, Elizabeth M. ; Lin, Fan‐Chi ; Schulte‐Pelkum, Vera ; Allam, Amir ; Qiu, Hongrui ; Gkogkas, Konstantinos Less -
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
Description:

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
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General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 48(15)
DOI:

https://doi.org/10.1029/2021gl092626
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0094-8276;1944-8007;
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PDF
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American Geophysical Union (AGU)
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Journal Article
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urn:sha256:41c65c1509929c2c7c9edbde79ef710c1144c6f3cd11e2f178ca29031984dc25
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https://repository.library.noaa.gov/view/noaa/52607/noaa_52607_DS1.pdf
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