DOI: 10.1002/grl.50678
论文题名: Ambient noise cross-correlation observations of fundamental and higher-mode Rayleigh wave propagation governed by basement resonance
作者: Savage M.K. ; Lin F.-C. ; Townend J.
刊名: Geophysical Research Letters
ISSN: 0094-8797
EISSN: 1944-8528
出版年: 2013
卷: 40, 期: 14 起始页码: 3556
结束页码: 3561
语种: 英语
英文关键词: ambient noise
; Canterbury
; higher-mode surface waves
; New Zealand
; resonance frequency
; spectral ratios
Scopus关键词: Ambient noise
; Canterbury
; New zealand
; Resonance frequencies
; Spectral ratios
; Buildings
; Earthquakes
; Natural frequencies
; Rayleigh waves
; Wave propagation
; Acoustic noise
; ambient noise
; correlation
; estimation method
; hazard assessment
; noise
; observational method
; one-dimensional modeling
; Rayleigh wave
; resonance
; sedimentary basin
; seismic hazard
; velocity
; Canterbury [South Island]
; New Zealand
; South Island
英文摘要: Measurement of basement seismic resonance frequencies can elucidate shallow velocity structure, an important factor in earthquake hazard estimation. Ambient noise cross correlation, which is well-suited to studying shallow earth structure, is commonly used to analyze fundamental-mode Rayleigh waves and, increasingly, Love waves. Here we show via multicomponent ambient noise cross correlation that the basement resonance frequency in the Canterbury region of New Zealand can be straightforwardly determined based on the horizontal to vertical amplitude ratio (H/V ratio) of the first higher-mode Rayleigh waves. At periods of 1-3 s, the first higher-mode is evident on the radial-radial cross-correlation functions but almost absent in the vertical-vertical cross-correlation functions, implying longitudinal motion and a high H/V ratio. A one-dimensional regional velocity model incorporating a ~ 1.5 km-thick sedimentary layer fits both the observed H/V ratio and Rayleigh wave group velocity. Similar analysis may enable resonance characteristics of other sedimentary basins to be determined. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880236261&doi=10.1002%2fgrl.50678&partnerID=40&md5=e2004d78429644cee48617a5fde6b5e0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6061
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Geophysics, Victoria University of Wellington, Box 600, Wellington 6140, New Zealand
Recommended Citation:
Savage M.K.,Lin F.-C.,Townend J.. Ambient noise cross-correlation observations of fundamental and higher-mode Rayleigh wave propagation governed by basement resonance[J]. Geophysical Research Letters,2013-01-01,40(14).