2.5D SH wave propagation in heterogeneous crustal wave guides using the phase screen method

doi:10.1785/0120070214

	2.5D SH wave propagation in heterogeneous crustal wave guides using the phase screen method
	Sun, Weijia 1; Fu, Li-Yun 1; Wu, Ru-Shan 2
刊名	BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
	2008-10-01
卷号	98 期号:5 页码:2391-2401
ISSN号	0037-1106
DOI	10.1785/0120070214
文献子类	Article
英文摘要	One-way approximations for regional phases slice the half-space crustal wave guide into a number of slabs perpendicular to the propagation direction; the Moho discontinuity can be easily treated as a perturbation from the crustal background. The advantage of one-way propagation methods is their great saving of computing time and memory compared to full-waveform numerical methods, especially for 3D simulations. In this article, we present general 2.5D SH formulas for the thin-slab method and a generalized screen propagator (GSP) for simulating SH wave propagation in the heterogeneous half-space crustal wave guide. Comparisons of numerical results with a finite-difference (FD) algorithm for a standard flat crustal model show excellent agreement, demonstrating the validity and accuracy of the 2.5D GSP for the half-space problem. We then compare the curves of energy attenuation calculated by the 2D and 2.5D formulas. The comparison shows that the energy attenuation of the 2.5D case is about 1.5-3 times greater than that of the 2D case when the trapped mode is formed. The SH screen propagator is also used to simulate two laterally unvarying (in the y direction) crustal models, showing the path effects on regional wave propagation.
WOS关键词	LATERALLY VARYING MEDIA ; LG ; APPROXIMATION ; SEISMOGRAMS ; REFLECTION ; SCATTERING
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SEISMOLOGICAL SOC AMER
WOS记录号	WOS:000259703700019
资助机构	Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240) ; Hi-Tech Research and Development Program of China(2006AA06Z240)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69404]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun, Weijia
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Modeling & Imaging Lab, Santa Cruz, CA 95064 USA
推荐引用方式 GB/T 7714	Sun, Weijia,Fu, Li-Yun,Wu, Ru-Shan. 2.5D SH wave propagation in heterogeneous crustal wave guides using the phase screen method[J]. BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA,2008,98(5):2391-2401.
APA	Sun, Weijia,Fu, Li-Yun,&Wu, Ru-Shan.(2008).2.5D SH wave propagation in heterogeneous crustal wave guides using the phase screen method.BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA,98(5),2391-2401.
MLA	Sun, Weijia,et al."2.5D SH wave propagation in heterogeneous crustal wave guides using the phase screen method".BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 98.5(2008):2391-2401.