The 1992 Landers earthquake: Effect of crustal heterogeneity on earthquake generation
文献类型：期刊论文
| 作者 | Tian You; Zhao Da-Peng; Sun Rou-Mei; Teng Ji-Wen |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2007-09-01 |
| 卷号 | 50期号:5页码:1488-1496 |
| 关键词 | southern California landers earthquake seismic tomography Poisson's ratio fluids |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | In order to understand the relationship between earthquake occurrence and crustal heterogeneities, we used 107401 P- and 19624 S-wave high-quality arrival times from the 1992 Landers aftershocks and other local earthquakes which were recorded by both permanent and temporary stations in Southern Califomia to determine detailed three-dimensional P- and S-wave velocity and Poisson's ratio structures beneath the Landers earthquake area. Our results show a close correlation between the seismic rupture zones and crustal heterogeneities. The distribution of the Landers aftershocks is cluster-like and separated by or terminated in the area where low-velocity anomalies exist. Most of the large earthquakes with magnitudes bigger than 4 occur in or around areas with high P-wave velocity. The possibility is that high-velocity areas are probably brittle and strong parts which can sustain seismogenic stress, and so can generate earthquakes. In contrast, low-velocity areas may have either higher degree of fracture, high fluid content, or higher temperatures where deformation is more likely to be aseismic. In addition, we infer that fluids exist in the Landers earthquake area from the distribution of P- and S-wave velocity and Poisson' s ratio. The existence of fluids may weaken the surrounding crustal rocks, then trigger strong earthquakes. |
| WOS关键词 | VELOCITY STRUCTURE ; SOUTHERN-CALIFORNIA ; SEISMIC TOMOGRAPHY ; UPPER-MANTLE ; P-WAVE ; FLUIDS ; REGION ; AREA ; INVERSION ; CHINA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000249679300025 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67296]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Tian You |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Tohoku Univ, Res Ctr Predict Earthquake & Volcan Erupt, Sendai, Miyagi 980, Japan 3.Jilin Univ, Changchun 130023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian You,Zhao Da-Peng,Sun Rou-Mei,et al. The 1992 Landers earthquake: Effect of crustal heterogeneity on earthquake generation[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2007,50(5):1488-1496. |
| APA | Tian You,Zhao Da-Peng,Sun Rou-Mei,&Teng Ji-Wen.(2007).The 1992 Landers earthquake: Effect of crustal heterogeneity on earthquake generation.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,50(5),1488-1496. |
| MLA | Tian You,et al."The 1992 Landers earthquake: Effect of crustal heterogeneity on earthquake generation".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 50.5(2007):1488-1496. |
入库方式： OAI收割
来源：地质与地球物理研究所
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