气候变化领域集成服务门户(CCPortal): Urban Seismic Site Characterization by Fiber-Optic Seismology

CCPortal

DOI	10.1029/2019JB018656
	Urban Seismic Site Characterization by Fiber-Optic Seismology
	Spica Z.J.; Perton M.; Martin E.R.; Beroza G.C.; Biondi B.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	Accurate ground motion prediction requires detailed site effect assessment, but in urban areas where such assessments are most important, geotechnical surveys are difficult to perform, limiting their availability. Distributed acoustic sensing (DAS) offers an appealing alternative by repurposing existing fiber-optic cables, normally employed for telecommunication, as an array of seismic sensors. We present a proof-of-concept demonstration by using DAS to produce high-resolution maps of the shallow subsurface with the Stanford DAS array, California. We describe new methods and their assumptions to assess H/V spectral ratio—a technique widely used to estimate the natural frequency of the soil—and to extract Rayleigh wave dispersion curves from ambient seismic field. These measurements are jointly inverted to provide models of shallow seismic velocities and sediment thicknesses above bedrock in central campus. The good agreement with an independent survey validates the methodology and demonstrates the power of DAS for microzonation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	ambient noise; distributed acoustic sensing; HVSR; microzonation; site effect
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/187909
作者单位	Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Formerly at Department of Geophysics, Stanford University, Stanford, CA, United States; Instituto de Ingeniería, Universidad Nacional Autónoma de México, CDMX, Mexico; Department of Mathematics, Program in Computational Modeling and Data Analytics, Virginia Tech, Blacksburg, VA, United States; Department of Geophysics, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Spica Z.J.,Perton M.,Martin E.R.,et al. Urban Seismic Site Characterization by Fiber-Optic Seismology[J],2020,125(3).
APA	Spica Z.J.,Perton M.,Martin E.R.,Beroza G.C.,&Biondi B..(2020).Urban Seismic Site Characterization by Fiber-Optic Seismology.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Spica Z.J.,et al."Urban Seismic Site Characterization by Fiber-Optic Seismology".Journal of Geophysical Research: Solid Earth 125.3(2020).