DOI: 10.1002/2014GL062662
论文题名: Site amplification, attenuation, and scattering from noise correlation amplitudes across a dense array in Long Beach, CA
作者: Bowden D.C. ; Tsai V.C. ; Lin F.C.
刊名: Geophysical Research Letters
ISSN: 0094-8903
EISSN: 1944-8634
出版年: 2015
卷: 42, 期: 5 起始页码: 1360
结束页码: 1367
语种: 英语
英文关键词: ambient noise
; seismology
; site amplification
; wavefront tracking
Scopus关键词: Acoustic noise
; Earthquakes
; Seismic response
; Seismology
; Ambient noise
; Amplitude gradient
; Amplitude variability
; Earthquake ground motions
; Frequency dependent
; Long Beach , California
; Site amplification
; Wavefront tracking
; Beaches
; ambient noise
; amplitude
; correlation
; geophone
; ground motion
; noise
; Rayleigh wave
; seismic attenuation
; seismic hazard
; seismology
; wave equation
; wave field
; California
; Long Beach [California]
; United States
英文摘要: For accurate seismic hazard evaluation, both the spatial and frequency-dependent variabilities in the amplitudes of earthquake ground motions are needed. While this information is rarely fully available due to the paucity of relevant seismic data, dense arrays like the 5200-geophone array in Long Beach, California provide the opportunity to study this amplitude variability. Here we show that ambient noise correlation amplitudes from the Long Beach array can be used to directly determine frequency-dependent site amplification factors. We analyze Rayleigh-wavefield amplitude gradients from ambient noise correlations that are processed so that relative amplitudes satisfy the wave equation and are therefore meaningful. Ultimately, we construct maps of site amplification across Long Beach at frequencies of 0.67, 1.0, and 2.0 Hz. These maps correlate well with local structure, notably the Newport-Inglewood Fault and also to known velocity structure. Through this process, we also obtain constraints on average attenuation structure and local scattering. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925870966&doi=10.1002%2f2014GL062662&partnerID=40&md5=84656cd5a67916711d0d1cc08ca4e8d1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8519
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Seismological Laboratory, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Bowden D.C.,Tsai V.C.,Lin F.C.. Site amplification, attenuation, and scattering from noise correlation amplitudes across a dense array in Long Beach, CA[J]. Geophysical Research Letters,2015-01-01,42(5).