Surface wave wavefield and dynamic analysis for three-dimensional abnormal structures with homogenous background velocity model

	Surface wave wavefield and dynamic analysis for three-dimensional abnormal structures with homogenous background velocity model
	Mang Su-Fang 1; Zhang Zhi 2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2008-07-01
卷号	51 期号:4 页码:1180-1187
关键词	lateral heterogeneity surface wave polarization anomaly
ISSN号	0001-5733
文献子类	Article
英文摘要	Besides anisotropy, lateral heterogeneity in the earth is also one important factor affecting surface wave velocities. Based on the theory of mode coupling and scattering of seismic waves, the amplitude and polarization anomalies of surface waves propagating in a 3D heterogeneous model are numerically computed. Surface wave wavefields have been simulated for several different incident situations. That is to say, the incident waves have different periods, different back-azimuths by rotating the structure in horizontal plane and different sizes of heterogeneity. Emphases were laid on the investigations of the importance of amplitude and polarization anomalies of surface waves, which are induced by lateral heterogeneity. We can conclude that amplitudes, especially polarization anomalies, of short-period surface waves are more sensitive to the lateral heterogeneity than those of long-period waves. Coupling between Rayleigh waves and Love waves occurs on transverse components because of the existence of lateral heterogeneity. Larger amplitudes of surface waves locate in the boundary of the lateral heterogeneity structure.
WOS关键词	MULTIPLE-SCATTERING ; UPPER-MANTLE ; INVERSION ; POLARIZATION ; OBSTACLES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000258061300028
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69828]
专题	中国科学院地质与地球物理研究所
通讯作者	Mang Su-Fang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China 2.Guilin Technol Coll, Dept Resource & Environm Engn, Key Lab Geol Engn Guangxi Prov, Guilin 541004, Peoples R China
推荐引用方式 GB/T 7714	Mang Su-Fang,Zhang Zhi. Surface wave wavefield and dynamic analysis for three-dimensional abnormal structures with homogenous background velocity model[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(4):1180-1187.
APA	Mang Su-Fang,&Zhang Zhi.(2008).Surface wave wavefield and dynamic analysis for three-dimensional abnormal structures with homogenous background velocity model.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(4),1180-1187.
MLA	Mang Su-Fang,et al."Surface wave wavefield and dynamic analysis for three-dimensional abnormal structures with homogenous background velocity model".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.4(2008):1180-1187.