Study of the Potential Earthquake Risk in the Western United States by the LURR Method Based on the Seismic Catalogue, Fault Geometry and Focal Mechanisms

doi:10.1007/s00024-015-1054-5

IMECH-IR > 非线性力学国家重点实验室

	Study of the Potential Earthquake Risk in the Western United States by the LURR Method Based on the Seismic Catalogue, Fault Geometry and Focal Mechanisms
	Zhang YX; Yikilmaz MB; Rundle JB; Yin XC; Liu Y(刘月); Zhang LP; Wang ZJ; Zhang, YX (reprint author), China Earthquake Networks Ctr, Beijing 100045, Peoples R China.
发表期刊	PURE AND APPLIED GEOPHYSICS
	2015-08
卷号	172 期号:8 页码:2265-2276
ISSN	0033-4553
摘要	Based on the load/unload response ratio (LURR) theory, spatial and temporal variation of Y/Y (c) (value of LURR/critical value of LURR under 90 % confidence) in the western United States and its adjacent area (31A degrees-44A degrees N, -128A degrees to -112A degrees E) during the period from 1980 to 2011 was studied. The selected study area was zoned into 20 sub-regions, in each of which the fault geometry and the focal mechanisms were very similar such that the stress fields were almost uniform. The loading and unloading periods were determined by calculating perturbations in the Coulomb failure stress in each sub-regions induced by earth tides. Earthquakes occurring in these sub-regions were identified as a loading or unloading type, and the response rate was chosen as the Benioff strain that can be calculated from earthquake magnitude M. With a time window of 1 year, a time moving step of 1 month, a space window of a circle region with a radius of 100 km, and a space moving step of 0.5A degrees latitudinally and longitudinally, snapshots of the evolution of Y/Y (c) were generated. Scanning results show that obvious Y/Y (c) anomalies can be detected near the epicenter of all big earthquakes larger than M6.5 in regions with reasonable seismic monitoring abilities. They also show Y/Y (c) anomalies occurred several years prior to the big earthquakes and the lasting time of the anomaly is from one year to several years. For some LURR anomalous regions, however, no earthquakes occurred. According to the characteristics of LURR anomalies, two regions with a high risk of big earthquakes were detected. One is between the northern region of the Bay Area and the Mendocino triple junction (38A degrees aEuro"40A degrees N, -124A degrees to -122A degrees E) and the other is between Lake Tahoe and Mono Lake (37.5A degrees aEuro"39.5A degrees N, -120A degrees to -118A degrees E) along the border of California and Nevada.
关键词	Lurr Y/y-c Stress Field Spatial And Temporal Scanning Western United States Earthquake Potential Risk
学科领域	Geochemistry & Geophysics
DOI	10.1007/s00024-015-1054-5
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000358414800013
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
项目资助者	Sino-US Cooperation Project from MOST, China [2010DFB20190]
论文分区	二类/Q2
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/55328
专题	非线性力学国家重点实验室
通讯作者	Zhang, YX (reprint author), China Earthquake Networks Ctr, Beijing 100045, Peoples R China.
推荐引用方式 GB/T 7714	Zhang YX,Yikilmaz MB,Rundle JB,et al. Study of the Potential Earthquake Risk in the Western United States by the LURR Method Based on the Seismic Catalogue, Fault Geometry and Focal Mechanisms[J]. PURE AND APPLIED GEOPHYSICS,2015,172,8,:2265-2276.
APA	Zhang YX.,Yikilmaz MB.,Rundle JB.,Yin XC.,Liu Y.,...&Zhang, YX .(2015).Study of the Potential Earthquake Risk in the Western United States by the LURR Method Based on the Seismic Catalogue, Fault Geometry and Focal Mechanisms.PURE AND APPLIED GEOPHYSICS,172(8),2265-2276.
MLA	Zhang YX,et al."Study of the Potential Earthquake Risk in the Western United States by the LURR Method Based on the Seismic Catalogue, Fault Geometry and Focal Mechanisms".PURE AND APPLIED GEOPHYSICS 172.8(2015):2265-2276.

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