A measuring study for single-trace Lg coda Q(Lg)(c)

	A measuring study for single-trace Lg coda Q(Lg)(c)
	Liu, JG ; Liu, FT ; Wang, FX ; Wang, YP
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	1999-05-01
卷号	42 期号:3 页码:371-382
关键词	Lg coda Lg coda Q(Lg)(c) SSR method intrinsic attenuation of media
ISSN号	0001-5733
文献子类	Article
英文摘要	A stacked spectral ratio method is applied to the measurement of Lg coda Q(Lg)(c) at regional epicentral, distances (Delta < 500km). In order to test the stability and reliability of the method, we select two sets of high signal to noise ratio seismic records at different regions. One set is Lg coda time series from the Beijing telemetry seismic network observed 15 aftershocks of the Datong principal earthquake on Oct 18, 1989 (M-L = 5.9). Other set is from the portable digital seismic network observed two earthquakes in Pingliang, Gansu province. The source parameters basically are same among every set of earthquakes, that is to say, their ray paths to the given station are almost same. So obtained Q(Lg)(c) can be regarded as an average attenuation effect over the paths, which is not affected by the sources. The measuring Q(Lg)(c) results show that: (1) Although there are different instruments used in two seismic networks with different observation conditions in every stations, fitting results of the Q(0) and eta are highly linear. It indicates that the SSR method is stable. (2) There are the basically same results of Lg coda Q(Lg)(c) at a given station observed different earthquakes of the same set, i,e. Q(0) and their average values are almost within the range of the standard error. It indicates that the SSR method is reliable. (3) Based on the measuring results of Lg Q(Lg)(c) at different stations recorded the same earthquake, it can be seen that there is obvious difference, which can be regarded as the lateral difference of the tectonic structure, on Lg coda Q(0) passing through different tectonic area. So if we select some earthquakes with a good azimuth distribution and there are a proper station distribution, we can image on Q(Lg)(c) in the study area using measuring Q(Lg)(c).
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000083223700010
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/75418]
专题	中国科学院地质与地球物理研究所
通讯作者	Liu, JG
作者单位	1.Chinese Acad Sci, Inst Geophys, Beijing 100101, Peoples R China 2.China Seismol Bur, Inst Geophys, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Liu, JG,Liu, FT,Wang, FX,et al. A measuring study for single-trace Lg coda Q(Lg)(c)[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,1999,42(3):371-382.
APA	Liu, JG,Liu, FT,Wang, FX,&Wang, YP.(1999).A measuring study for single-trace Lg coda Q(Lg)(c).CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,42(3),371-382.
MLA	Liu, JG,et al."A measuring study for single-trace Lg coda Q(Lg)(c)".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 42.3(1999):371-382.