A three-step maximum a posteriori probability method for InSAR data   inversion of coseismic rupture with application to the 14 April 2010 M-w   6.9 Yushu, China, earthquake

doi:10.1002/jgrb.50244

CORC > 北京大学 > 地球与空间科学学院

	A three-step maximum a posteriori probability method for InSAR data inversion of coseismic rupture with application to the 14 April 2010 M-w 6.9 Yushu, China, earthquake
	Sun, Jianbao ; Shen, Zheng-Kang ; Buergmann, Roland ; Wang, Min ; Chen, Lichun ; Xu, Xiwei
刊名	journal of geophysical research solid earth
	2013
关键词	three-step maximum a posteriori probability inversion fully Bayesian inversion mixed linear-nonlinear Bayesian inversion Ganzi-Yushu fault Yushu earthquake coseismic slip GEODETIC DATA FAULT SLIP SPATIAL-DISTRIBUTION DEFORMATION INTERFEROMETRY PARAMETERS CALIFORNIA TURKEY RADAR SPACE
DOI	10.1002/jgrb.50244
英文摘要	We develop a three-step maximum a posteriori probability method for coseismic rupture inversion, which aims at maximizing the a posterior probability density function (PDF) of elastic deformation solutions of earthquake rupture. The method originates from the fully Bayesian inversion and mixed linear-nonlinear Bayesian inversion methods and shares the same posterior PDF with them, while overcoming difficulties with convergence when large numbers of low-quality data are used and greatly improving the convergence rate using optimization procedures. A highly efficient global optimization algorithm, adaptive simulated annealing, is used to search for the maximum of a posterior PDF (mode in statistics) in the first step. The second step inversion approaches the true solution further using the Monte Carlo inversion technique with positivity constraints, with all parameters obtained from the first step as the initial solution. Then slip artifacts are eliminated from slip models in the third step using the same procedure of the second step, with fixed fault geometry parameters. We first design a fault model with 45 degrees dip angle and oblique slip, and produce corresponding synthetic interferometric synthetic aperture radar (InSAR) data sets to validate the reliability and efficiency of the new method. We then apply this method to InSAR data inversion for the coseismic slip distribution of the 14 April 2010 M-w 6.9 Yushu, China earthquake. Our preferred slip model is composed of three segments with most of the slip occurring within 15km depth and the maximum slip reaches 1.38m at the surface. The seismic moment released is estimated to be 2.32e+19Nm, consistent with the seismic estimate of 2.50e+19Nm.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000324991900045&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geochemistry & Geophysics; SCI(E); 3; ARTICLE; 8; 4599-4627; 118
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/221104]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Sun, Jianbao,Shen, Zheng-Kang,Buergmann, Roland,et al. A three-step maximum a posteriori probability method for InSAR data inversion of coseismic rupture with application to the 14 April 2010 M-w 6.9 Yushu, China, earthquake[J]. journal of geophysical research solid earth,2013.
APA	Sun, Jianbao,Shen, Zheng-Kang,Buergmann, Roland,Wang, Min,Chen, Lichun,&Xu, Xiwei.(2013).A three-step maximum a posteriori probability method for InSAR data inversion of coseismic rupture with application to the 14 April 2010 M-w 6.9 Yushu, China, earthquake.journal of geophysical research solid earth.
MLA	Sun, Jianbao,et al."A three-step maximum a posteriori probability method for InSAR data inversion of coseismic rupture with application to the 14 April 2010 M-w 6.9 Yushu, China, earthquake".journal of geophysical research solid earth (2013).