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DOI | 10.1002/2017GL075163 |
Stress- and Structure-Induced Anisotropy in Southern California From Two Decades of Shear Wave Splitting Measurements | |
Li, Zefeng1,2; Peng, Zhigang1 | |
2017-10-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:19 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We measure shear wave splitting (SWS) parameters (i.e., fast direction and delay time) using 330,000 local earthquakes recorded by more than 400 stations of the Southern California Seismic Network (1995-2014). The resulting 232,000 SWS measurements (90,000 high-quality ones) provide a uniform and comprehensive database of local SWS measurements in Southern California. The fast directions at many stations are consistent with regional maximum compressional stress sigma(Hmax). However, several regions show clear deviations from the sigma(Hmax) directions. These include linear sections along the San Andreas Fault and the Santa Ynez Fault, geological blocks NW to the Los Angeles Basin, regions around the San Jacinto Fault, the Peninsular Ranges near San Diego, and the Coso volcanic field. These complex patterns show that regional stresses and active faults cannot adequately explain the upper crustal anisotropy in Southern California. Other types of local structures, such as local rock types or tectonic features, also play significant roles. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413921300011 |
WOS关键词 | KARADERE-DUZCE BRANCH ; NORTH ANATOLIAN FAULT ; SAN-ANDREAS FAULT ; CRUSTAL ANISOTROPY ; VELOCITY-ANISOTROPY ; SYSTEMATIC ANALYSIS ; SEISMIC ANISOTROPY ; EARTHQUAKE ; ANZA ; TAIWAN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25507 |
专题 | 气候变化 |
作者单位 | 1.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 2.CALTECH, Seismol Lab, Pasadena, CA 91125 USA |
推荐引用方式 GB/T 7714 | Li, Zefeng,Peng, Zhigang. Stress- and Structure-Induced Anisotropy in Southern California From Two Decades of Shear Wave Splitting Measurements[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(19). |
APA | Li, Zefeng,&Peng, Zhigang.(2017).Stress- and Structure-Induced Anisotropy in Southern California From Two Decades of Shear Wave Splitting Measurements.GEOPHYSICAL RESEARCH LETTERS,44(19). |
MLA | Li, Zefeng,et al."Stress- and Structure-Induced Anisotropy in Southern California From Two Decades of Shear Wave Splitting Measurements".GEOPHYSICAL RESEARCH LETTERS 44.19(2017). |
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