气候变化领域集成服务门户(CCPortal): Structure-controlled asperities of the 1920 Haiyuan M8.5 and 1927 Gulang M8 earthquakes, NE Tibet, China, revealed by high-resolution seismic tomography

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DOI	10.1038/s41598-021-84642-7
	Structure-controlled asperities of the 1920 Haiyuan M8.5 and 1927 Gulang M8 earthquakes, NE Tibet, China, revealed by high-resolution seismic tomography
	Sun, Quan; Pei, Shunping; Cui, Zhongxiong; Chen, Yongshun John; Liu, Yanbing; Xue, Xiaotian; Li, Jiawei; Li, Lei; Zuo, Hong
通讯作者	Pei, SP (通讯作者)
发表日期	2021
ISSN	2045-2322
卷号	11 期号:1
英文摘要	Detailed crustal structure of large earthquake source regions is of great significance for understanding the earthquake generation mechanism. Numerous large earthquakes have occurred in the NE Tibetan Plateau, including the 1920 Haiyuan M8.5 and 1927 Gulang M8 earthquakes. In this paper, we obtained a high-resolution three-dimensional crustal velocity model around the source regions of these two large earthquakes using an improved double-difference seismic tomography method. High-velocity anomalies encompassing the seismogenic faults are observed to extend to depths of 15 km, suggesting the asperity (high-velocity area) plays an important role in the preparation process of large earthquakes. Asperities are strong in mechanical strength and could accumulate tectonic stress more easily in long frictional locking periods, large earthquakes are therefore prone to generate in these areas. If the close relationship between the aperity and high-velocity bodies is valid for most of the large earthquakes, it can be used to predict potential large earthquakes and estimate the seismogenic capability of faults in light of structure studies.
关键词	VELOCITY STRUCTURE DEFORMATION BENEATH NORTHEASTERN MARGIN SURFACE RUPTURES FAULT GEOMETRY ADJACENT AREAS HAYWARD FAULT DISPLACEMENT ALGORITHM MECHANISM
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000626140100019
来源期刊	SCIENTIFIC REPORTS
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/260347
推荐引用方式 GB/T 7714	Sun, Quan,Pei, Shunping,Cui, Zhongxiong,et al. Structure-controlled asperities of the 1920 Haiyuan M8.5 and 1927 Gulang M8 earthquakes, NE Tibet, China, revealed by high-resolution seismic tomography[J]. 中国科学院青藏高原研究所,2021,11(1).
APA	Sun, Quan.,Pei, Shunping.,Cui, Zhongxiong.,Chen, Yongshun John.,Liu, Yanbing.,...&Zuo, Hong.(2021).Structure-controlled asperities of the 1920 Haiyuan M8.5 and 1927 Gulang M8 earthquakes, NE Tibet, China, revealed by high-resolution seismic tomography.SCIENTIFIC REPORTS,11(1).
MLA	Sun, Quan,et al."Structure-controlled asperities of the 1920 Haiyuan M8.5 and 1927 Gulang M8 earthquakes, NE Tibet, China, revealed by high-resolution seismic tomography".SCIENTIFIC REPORTS 11.1(2021).