DOI: 10.1002/2014GL062571
论文题名: On the validation of seismic imaging methods: Finite frequency or ray theory?
作者: MacEira M. ; Larmat C. ; Porritt R.W. ; Higdon D.M. ; Rowe C.A. ; Allen R.M.
刊名: Geophysical Research Letters
ISSN: 0094-9014
EISSN: 1944-8745
出版年: 2015
卷: 42, 期: 2 起始页码: 323
结束页码: 330
语种: 英语
英文关键词: finite frequency
; ray theory
; seismic models
; spectral element method
; validation
Scopus关键词: Algorithms
; Shear waves
; Finite frequencies
; Ray theory
; Seismic model
; Spectral element method
; Validation
; Seismology
; correlation
; imaging method
; phase equilibrium
; S-wave
; sampling
; seismic method
; spectral analysis
; statistical analysis
; waveform analysis
; North America
英文摘要: We investigate the merits of the more recently developed finite-frequency approach to tomography against the more traditional and approximate ray theoretical approach for state of the art seismic models developed for western North America. To this end, we employ the spectral element method to assess the agreement between observations on real data and measurements made on synthetic seismograms predicted by the models under consideration. We check for phase delay agreement as well as waveform cross-correlation values. Based on statistical analyses on S wave phase delay measurements, finite frequency shows an improvement over ray theory. Random sampling using cross-correlation values identifies regions where synthetic seismograms computed with ray theory and finite-frequency models differ the most. Our study suggests that finite-frequency approaches to seismic imaging exhibit measurable improvement for pronounced low-velocity anomalies such as mantle plumes. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923592865&doi=10.1002%2f2014GL062571&partnerID=40&md5=6a495070ffb9546a4f64a7537908300a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8630
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: Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, United States
Recommended Citation:
MacEira M.,Larmat C.,Porritt R.W.,et al. On the validation of seismic imaging methods: Finite frequency or ray theory?[J]. Geophysical Research Letters,2015-01-01,42(2).