Static Coulomb stress changes and seismicity rate in the source region of the 12 February, 2014 M-w 7.0 Yutian earthquake in Xinjiang, China
文献类型：期刊论文
| 作者 | Zhao Li-Bo1,2; Zhao Lian-Feng2; Xie Xiao-Bi3; Cao Jun-Xing1; Yao Zhen-Xing2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 59期号:10页码:3732-3743 |
| 关键词 | Yutian earthquake Static stress changes Aftershocks Seismicity rate |
| DOI | 10.6038/cjg20161018 |
| 文献子类 | Article |
| 英文摘要 | On February 12, 2014, an M-w 7.0 earthquake occurred in Yutian region, Xinjiang, China. The epicenter of this earthquake is located in an area linking the Bayan Har block and west Kunlun block, a region with highly developed east-west trend tension structures. This earthquake is approximately 100 km away from a previous earthquake, the 2008 M-w 7.1 Yutian earthquake. We investigate the Coulomb stress changes due to the 2008 earthquake and its triggering effect on the 2014 earthquake. The Coulomb stress changes caused by the two mainshocks and their effects on the subsequent aftershock sequences are also investigated. The main fracture of the 2008 earthquake extends along the NE direction. Based on the finite-sized fault model, we calculate its static Coulomb stress, which has three stress increase lobes at each ends. The 2014 Yutian earthquake is located in the increased Coulomb stress lobe of the 2008 earthquake, therefore it may be trigged by the 2008 earthquake. For both earthquakes, their aftershock distributions are correlated with their Coulomb stress changes caused by the mainshocks calculated based on their optimal orientations. We find that most of the aftershocks occurred in the increased Coulomb stress lobe, while few aftershocks occurred in the stress shadow zone. An apparent correlation is obtained between the mainshock stress changes and the observed spatial distribution of the aftershock occurrence, demonstrating the usefulness of the stress maps in predicting likely upcoming aftershock locations. An M-w 5.2 aftershock occurred in the NW of the 2014 mainshock where the stress increases for 0.63 X 10(5) Pa. The observation indicates that the regions with high seismicity rate are highly correlated with regions with high Coulomb stress changes, e.g., the eastern of the Kangxiwar fault, the middle and EN segments of Gonggar Co fault, etc. |
| WOS关键词 | SOUTHERN SAN-ANDREAS ; STRIKE-SLIP FAULTS ; WENCHUAN EARTHQUAKE ; RUPTURE PROCESS ; CALIFORNIA ; AFTERSHOCKS ; NORTHRIDGE ; MAGNITUDE ; SHADOWS ; OBLIQUE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000388654300018 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53229]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 作者单位 | 1.Chengdu Univ Technol, Coll Geophys, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 3.Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA |
| 推荐引用方式 GB/T 7714 | Zhao Li-Bo,Zhao Lian-Feng,Xie Xiao-Bi,et al. Static Coulomb stress changes and seismicity rate in the source region of the 12 February, 2014 M-w 7.0 Yutian earthquake in Xinjiang, China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(10):3732-3743. |
| APA | Zhao Li-Bo,Zhao Lian-Feng,Xie Xiao-Bi,Cao Jun-Xing,&Yao Zhen-Xing.(2016).Static Coulomb stress changes and seismicity rate in the source region of the 12 February, 2014 M-w 7.0 Yutian earthquake in Xinjiang, China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(10),3732-3743. |
| MLA | Zhao Li-Bo,et al."Static Coulomb stress changes and seismicity rate in the source region of the 12 February, 2014 M-w 7.0 Yutian earthquake in Xinjiang, China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.10(2016):3732-3743. |
入库方式： OAI收割
来源：地质与地球物理研究所
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