气候变化领域集成服务门户(CCPortal): Determination of Near Surface Shear-Wave Velocities in the Central Los Angeles Basin With Dense Arrays

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DOI	10.1029/2020JB021369
	Determination of Near Surface Shear-Wave Velocities in the Central Los Angeles Basin With Dense Arrays
	Jia Z.; Clayton R.W.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	In this study, we investigate the shallow shear wave velocity structure of the Los Angeles Basin in southern California, using ambient noise correlations between 5 dense arrays and 21 broadband stations from the Southern California Seismic Network (SCSN). We observe clear fundamental mode and first overtone Rayleigh waves in the frequency band 0.25–2.0 Hz, and obtain group velocity maps through tomography. We further derive a 3D shear wave velocity model, covering a large portion of the central LA Basin for the depths shallower than 3 km. We found that the small scale shallow velocity structure heterogeneities are better resolved compared with the SCEC Community velocity models. Our model captures the presence of the Newport-Inglewood fault by a NW–SE trending high velocity belt. Our model provides more accurate constraints on local ground motion predictions with detailed mapping of structural heterogeneities. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Dense array; ground motion amplification; Los Angeles Basin; seismic tomography; structural heterogeneity
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187104
作者单位	Seismological Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Jia Z.,Clayton R.W.. Determination of Near Surface Shear-Wave Velocities in the Central Los Angeles Basin With Dense Arrays[J],2021,126(5).
APA	Jia Z.,&Clayton R.W..(2021).Determination of Near Surface Shear-Wave Velocities in the Central Los Angeles Basin With Dense Arrays.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Jia Z.,et al."Determination of Near Surface Shear-Wave Velocities in the Central Los Angeles Basin With Dense Arrays".Journal of Geophysical Research: Solid Earth 126.5(2021).