气候变化领域集成服务门户(CCPortal): Rupture process of the 2015 Pishan earthquake from joint inversion of InSAR, teleseismic data and GPS

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DOI	10.1007/s11430-017-9230-8
	Rupture process of the 2015 Pishan earthquake from joint inversion of InSAR, teleseismic data and GPS
	Wang, Xun; Wang, Weimin; Zhao, Junmeng; Yao, Zhenxing
通讯作者	Wang, WM (通讯作者)
发表日期	2018
ISSN	1674-7313
EISSN	1869-1897
起始页码	1467
结束页码	1481
卷号	61 期号:10
英文摘要	An earthquake of M(w)6.4 occurred in Pishan County in Xinjiang Province, northwestern Tibetan Plateau, on July 3, 2015. The epicenter was located on an active blind thrust system located at the northern margin of the Western Kunlun Mountain Orogenic Belt southwest of the Tarim Basin. We constructed a shovel-shaped fault model based on the layered-crust model with reference to the seismic reflection profile, and obtained the rupture process of the earthquake from the joint inversion of Interferometric Synthetic Aperture Radar (InSAR) measurements, far-field waveform data, and Global Positioning System (GPS) data. The results show that the seismic fault dips southward with a strike of 109 degrees, and the rupture direction was essentially northward. The fault plane rupture distribution is concentrated, with a maximum recorded slip of 73 cm. The main features of the fault are as follows: low inclination angle (25 degrees-10 degrees), thrust slip at a depth of 9-13 km, rupture propagation time of about 12 s, no significant slip in soft or hard sedimentary layers at 0-4 km depth and propagation from the initial rupture point to the surrounding area with no obvious directionality. The InSAR time-series analysis method is used to determine the deformation rate in the source region within 2 years after the earthquake, and the maximum value is similar to 17 mm yr(-1) in the radar line-of-sight direction. Obvious post-earthquake deformation is evident in the hanging wall, with a similar trend to the coseismic displacement field. These results suggest that the Pishan earthquake has not completely released the accumulated energy of the region, given that the multilayer fold structure above the blind fault is still in a process of slow uplift since the earthquake. Post-earthquake adjustment models and aftershock risk analysis require further study using more independent data.
关键词	W 6.4 PISHAN NORTHWEST TIBETAN PLATEAU WEST KUNLUN RANGE RADAR INTERFEROMETRY GROUND DEFORMATION TARIM BASIN SENTINEL-1A CHINA FAULT UPLIFT
英文关键词	Pishan earthquake; Source process; Joint inversion; Post-earthquake deformation
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000446517200010
来源期刊	SCIENCE CHINA-EARTH SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259148
推荐引用方式 GB/T 7714	Wang, Xun,Wang, Weimin,Zhao, Junmeng,et al. Rupture process of the 2015 Pishan earthquake from joint inversion of InSAR, teleseismic data and GPS[J]. 中国科学院青藏高原研究所,2018,61(10).
APA	Wang, Xun,Wang, Weimin,Zhao, Junmeng,&Yao, Zhenxing.(2018).Rupture process of the 2015 Pishan earthquake from joint inversion of InSAR, teleseismic data and GPS.SCIENCE CHINA-EARTH SCIENCES,61(10).
MLA	Wang, Xun,et al."Rupture process of the 2015 Pishan earthquake from joint inversion of InSAR, teleseismic data and GPS".SCIENCE CHINA-EARTH SCIENCES 61.10(2018).