Automated determination of magnitude and source length of large earthquakes using backprojection and P wave amplitudes

doi:10.1002/2017GL073801

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Automated determination of magnitude and source length of large earthquakes using backprojection and P wave amplitudes
	Wang, Dun 1,2; Kawakatsu, Hitoshi 2; Zhuang, Jiancang 3; Mori, Jim 4; Maeda, Takuto 2; Tsuruoka, Hiroshi 2; Zhao, Xu 5
刊名	GEOPHYSICAL RESEARCH LETTERS
	2017-06-16
卷号	44 期号:11 页码:5447-5456
关键词	seismic array magnitude determination disaster mitigation
ISSN号	0094-8276
DOI	10.1002/2017GL073801
文献子类	Article
英文摘要	Fast estimates of magnitude and source extent of large earthquakes are fundamental for disaster mitigation. However, resolving these estimates within 10-20min after origin time remains challenging. Here we propose a robust algorithm to resolve magnitude and source length of large earthquakes using seismic data recorded by regional arrays and global stations. We estimate source length and source duration by backprojecting seismic array data. Then the source duration and the maximum amplitude of the teleseismic P wave displacement waveforms are used jointly to estimate magnitude. We apply this method to 74 shallow earthquakes that occurred within epicentral distances of 30-85 degrees to Hi-net (2004-2014). The estimated magnitudes are similar to moment magnitudes estimated from W-phase inversions (U.S. Geological Survey), with standard deviations of 0.14-0.19 depending on the global station distributions. Application of this method to multiple regional seismic arrays could benefit tsunami warning systems and emergency response to large global earthquakes.
WOS关键词	FREQUENCY ENERGY RADIATION ; SUMATRA-ANDAMAN EARTHQUAKE ; TOHOKU EARTHQUAKE ; PACIFIC COAST ; DISPLACEMENT AMPLITUDE ; RAPID-DETERMINATION ; BACK-PROJECTION ; THRUST-FAULT ; RUPTURE ; DURATION
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000404382600024
资助机构	Japan Society for the Promotion of Science(P13324) ; National Natural Science Foundation of China(41004020 ; Fundamental Research Funds for the Central Universities(CUG170602) ; China University of Geosciences (Wuhan) ; 41474050) ; Japan Society for the Promotion of Science(P13324) ; National Natural Science Foundation of China(41004020 ; Fundamental Research Funds for the Central Universities(CUG170602) ; China University of Geosciences (Wuhan) ; 41474050) ; Japan Society for the Promotion of Science(P13324) ; National Natural Science Foundation of China(41004020 ; Fundamental Research Funds for the Central Universities(CUG170602) ; China University of Geosciences (Wuhan) ; 41474050) ; Japan Society for the Promotion of Science(P13324) ; National Natural Science Foundation of China(41004020 ; Fundamental Research Funds for the Central Universities(CUG170602) ; China University of Geosciences (Wuhan) ; 41474050)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/46363]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者	Wang, Dun
作者单位	1.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan, Peoples R China 2.Univ Tokyo, Earthquake Res Inst, Tokyo, Japan 3.Inst Stat Math, Tachikawa, Tokyo, Japan 4.Kyoto Univ, Disaster Prevent Res Inst, Kyoto, Japan 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Dun,Kawakatsu, Hitoshi,Zhuang, Jiancang,et al. Automated determination of magnitude and source length of large earthquakes using backprojection and P wave amplitudes[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(11):5447-5456.
APA	Wang, Dun.,Kawakatsu, Hitoshi.,Zhuang, Jiancang.,Mori, Jim.,Maeda, Takuto.,...&Zhao, Xu.(2017).Automated determination of magnitude and source length of large earthquakes using backprojection and P wave amplitudes.GEOPHYSICAL RESEARCH LETTERS,44(11),5447-5456.
MLA	Wang, Dun,et al."Automated determination of magnitude and source length of large earthquakes using backprojection and P wave amplitudes".GEOPHYSICAL RESEARCH LETTERS 44.11(2017):5447-5456.