Waveform Retrieval and Phase Identification for Seismic Data from the CASS Experiment

doi:10.1007/s00024-012-0585-2

	Waveform Retrieval and Phase Identification for Seismic Data from the CASS Experiment
	Li, Zhiwei 1; You, Qingyu 2; Ni, Sidao 1; Hao, Tianyao 2; Wang, Hongti 3; Zhuang, Cantao 3
刊名	PURE AND APPLIED GEOPHYSICS
	2013-05-01
卷号	170 期号:5 页码:815-830
关键词	Controlled source Wigner-Ville distribution Wigner-Hough transform seismic waveform seismic phases
ISSN号	0033-4553
DOI	10.1007/s00024-012-0585-2
文献子类	Article
英文摘要	The little destruction to the deployment site and high repeatability of the Controlled Accurate Seismic Source (CASS) shows its potential for investigating seismic wave velocities in the Earth's crust. However, the difficulty in retrieving impulsive seismic waveforms from the CASS data and identifying the seismic phases substantially prevents its wide applications. For example, identification of the seismic phases and accurate measurement of travel times are essential for resolving the spatial distribution of seismic velocities in the crust. Until now, it still remains a challenging task to estimate the accurate travel times of different seismic phases from the CASS data which features extended wave trains, unlike processing of the waveforms from impulsive events such as earthquakes or explosive sources. In this study, we introduce a time-frequency analysis method to process the CASS data, and try to retrieve the seismic waveforms and identify the major seismic phases traveling through the crust. We adopt the Wigner-Ville Distribution (WVD) approach which has been used in signal detection and parameter estimation for linear frequency modulation (LFM) signals, and proves to feature the best time-frequency convergence capability. The Wigner-Hough transform (WHT) is applied to retrieve the impulsive waveforms from multi-component LFM signals, which comprise seismic phases with different arrival times. We processed the seismic data of the 40-ton CASS in the field experiment around the Xinfengjiang reservoir with the WVD and WHT methods. The results demonstrate that these methods are effective in waveform retrieval and phase identification, especially for high frequency seismic phases such as PmP and SmS with strong amplitudes in large epicenter distance of 80-120 km. Further studies are still needed to improve the accuracy on travel time estimation, so as to further promote applicability of the CASS for and imaging the seismic velocity structure.
WOS关键词	MOHO REFLECTIONS SMS ; STRONG GROUND MOTION ; TEMPORAL-CHANGES ; ACTIVE SOURCE ; SOUTHERN-CALIFORNIA ; TRAVEL-TIME ; ML SCALE ; VELOCITY ; CHINA ; FAULT
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SPRINGER BASEL AG
WOS记录号	WOS:000317970700005
资助机构	China Earthquake Administration fund(200808068) ; China Earthquake Administration fund(200808068) ; NSFC(41074032) ; NSFC(41074032) ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics ; China Earthquake Administration fund(200808068) ; China Earthquake Administration fund(200808068) ; NSFC(41074032) ; NSFC(41074032) ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics ; China Earthquake Administration fund(200808068) ; China Earthquake Administration fund(200808068) ; NSFC(41074032) ; NSFC(41074032) ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics ; China Earthquake Administration fund(200808068) ; China Earthquake Administration fund(200808068) ; NSFC(41074032) ; NSFC(41074032) ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87634]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, Zhiwei
作者单位	1.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 3.China Earthquake Adm, Inst Earthquake Sci, Beijing 100036, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhiwei,You, Qingyu,Ni, Sidao,et al. Waveform Retrieval and Phase Identification for Seismic Data from the CASS Experiment[J]. PURE AND APPLIED GEOPHYSICS,2013,170(5):815-830.
APA	Li, Zhiwei,You, Qingyu,Ni, Sidao,Hao, Tianyao,Wang, Hongti,&Zhuang, Cantao.(2013).Waveform Retrieval and Phase Identification for Seismic Data from the CASS Experiment.PURE AND APPLIED GEOPHYSICS,170(5),815-830.
MLA	Li, Zhiwei,et al."Waveform Retrieval and Phase Identification for Seismic Data from the CASS Experiment".PURE AND APPLIED GEOPHYSICS 170.5(2013):815-830.