Confirmation of the double-asperity model for the 2016 M-w 6.6 Akto earthquake (NW China) by seismic and InSAR data

doi:10.1016/j.jseaes.2019.103998

ISL OpenIR > 盐湖地质与环境实验室

	Confirmation of the double-asperity model for the 2016 M-w 6.6 Akto earthquake (NW China) by seismic and InSAR data
	Zhang, Xu; Xu, Li-Sheng; Li, Lu; Yi, Lei; Feng, Wanpeng
	2019-10-15
发表期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
卷号	184
摘要	On November 25, 2016, an M-w 6.6 earthquake struck Akto, a county in the Xinjiang Autonomous Region of China. This earthquake nucleated on the dextral steep-dip strike-slip segment of the Muji fault, in the western Tibetan Plateau. In this study we conducted a joint inversion using a higher number of data than in previous works (i.e., teleseismic P and SH waveform, near-field seismic waveform, and coseismic InSAR displacement data), in order to analyze the spatiotemporal rupture process of this seismic event. The results of the joint inversion showed that the event consisted in a primarily unilateral rupture toward east-southeast (along the Muji fault) and that 90% of the scalar seismic moment was released in the first 18 s. Moreover, we confirmed the occurrence of two major asperities: the first one located right next to the hypocenter, and the second one similar to 30-35 km east of the hypocenter. The first asperity was found at a deeper depth than the second asperity; additionally, it was larger and had a smaller slip. The results of the Coulomb stress change analysis suggested that the rupture of the first asperity triggered the rupture of the second one. The heterogeneity of the on-fault slip revealed the heterogeneity of the inherent strength and stress of the Muji fault; moreover, the clear slip deficit area, characterized by a high Coulomb stress, might indicate a high seismic risk.
DOI	10.1016/j.jseaes.2019.103998
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34038
专题	盐湖地质与环境实验室中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Zhang, Xu,Xu, Li-Sheng,Li, Lu,et al. Confirmation of the double-asperity model for the 2016 M-w 6.6 Akto earthquake (NW China) by seismic and InSAR data[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,184.
APA	Zhang, Xu,Xu, Li-Sheng,Li, Lu,Yi, Lei,&Feng, Wanpeng.(2019).Confirmation of the double-asperity model for the 2016 M-w 6.6 Akto earthquake (NW China) by seismic and InSAR data.JOURNAL OF ASIAN EARTH SCIENCES,184.
MLA	Zhang, Xu,et al."Confirmation of the double-asperity model for the 2016 M-w 6.6 Akto earthquake (NW China) by seismic and InSAR data".JOURNAL OF ASIAN EARTH SCIENCES 184(2019).

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