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.
Source PublicationPURE AND APPLIED GEOPHYSICS
2015-08
Volume172Issue:8Pages:2265-2276
ISSN0033-4553
AbstractBased 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.
KeywordLurr Y/y-c Stress Field Spatial And Temporal Scanning Western United States Earthquake Potential Risk
Subject AreaGeochemistry & Geophysics
DOI10.1007/s00024-015-1054-5
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000358414800013
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
Funding OrganizationSino-US Cooperation Project from MOST, China [2010DFB20190]
Classification二类/Q2
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/55328
Collection非线性力学国家重点实验室
Corresponding AuthorZhang, YX (reprint author), China Earthquake Networks Ctr, Beijing 100045, Peoples R China.
Recommended Citation
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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