Patterns and mechanisms of coseismic and postseismic slips of the 2011   M-w 7.1 Van (Turkey) earthquake revealed by multi-platform synthetic   aperture radar interferometry

doi:10.1016/j.tecto.2014.06.011

CORC > 北京大学 > 地球与空间科学学院

	Patterns and mechanisms of coseismic and postseismic slips of the 2011 M-w 7.1 Van (Turkey) earthquake revealed by multi-platform synthetic aperture radar interferometry
	Feng, Wanpeng ; Li, Zhenhong ; Hoey, Trevor ; Zhang, Yong ; Wang, Rongjiang ; Samsonov, Sergey ; Li, Yongsheng ; Xu, Zhonghuai
刊名	tectonophysics
	2014
关键词	Van earthquake Coseismic modelling InSAR inversion Topographic effects Afterslip modelling SAN-ANDREAS FAULT EASTERN TURKEY 23 OCTOBER SURFACE DEFORMATION INSAR OBSERVATIONS TENSILE FAULTS STRESS CHANGES HALF-SPACE RUPTURE INVERSION
DOI	10.1016/j.tecto.2014.06.011
英文摘要	On 23rd October 2011, a M-w 7.1 reverse slip earthquake occurred in the Bardakci-Saray thrust fault zone in the Van region, Eastern Turkey. Earlier geodetic studies have found different slip distributions in terms of both magnitude and pattern. In this paper, we present several COSMO-SkyMED (CSK), Envisat ASAR and RADARSAT-2 interferograms spanning different time intervals, showing that significant postseismic signals can be observed in the first three days after the mainshock. Using observations that combine coseismic and postseismic signals is shown to significantly underestimate coseismic slip. We hence employed the CSK pair with the minimum postseismic signals to generate one conventional interferogram and one along-track interferogram for further coseismic modelling. Our best-fit coseismic slip model suggests that: (1) this event is associated with a buried NNW dipping fault with a preferable dip angle of 49 degrees and a maximum slip of 6.5 m at a depth of 12 km; and (2) two unequal asperities can be observed, consistent with previous seismic solutions. Significant oblique aseismic slip with predominant left-lateral slip components above the coseismic rupture zone within the first 3 days after the mainshock is also revealed by a postseismic CSK interferogram, indicating that the greatest principal stress axis might have rotated due to a significant stress drop during the coseismic rupture. (C) 2014 Elsevier B.V. All rights reserved.; Geochemistry & Geophysics; SCI(E); EI; 1; ARTICLE; wanpeng.feng@hotmail.com; C; 188-198; 632
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/208744]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Feng, Wanpeng,Li, Zhenhong,Hoey, Trevor,et al. Patterns and mechanisms of coseismic and postseismic slips of the 2011 M-w 7.1 Van (Turkey) earthquake revealed by multi-platform synthetic aperture radar interferometry[J]. tectonophysics,2014.
APA	Feng, Wanpeng.,Li, Zhenhong.,Hoey, Trevor.,Zhang, Yong.,Wang, Rongjiang.,...&Xu, Zhonghuai.(2014).Patterns and mechanisms of coseismic and postseismic slips of the 2011 M-w 7.1 Van (Turkey) earthquake revealed by multi-platform synthetic aperture radar interferometry.tectonophysics.
MLA	Feng, Wanpeng,et al."Patterns and mechanisms of coseismic and postseismic slips of the 2011 M-w 7.1 Van (Turkey) earthquake revealed by multi-platform synthetic aperture radar interferometry".tectonophysics (2014).