Focal Mechanism Solutions and Stress Field Inversion of Moderately Strong Earthquakes in the Northern Tianshan Area |
| |
| Authors: | Long Haiying Gao Guoying Nie Xiaohong and Li Yinzhen |
| |
| Institution: | Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China |
| |
| Abstract: | Using the focal mechanism solutions of 24 moderately strong earthquakes in the northern Tianshan area,we carried out system cluster and stress field inversion analysis.The result indicates that,the focal mechanism solutions of moderately strong earthquakes are mainly dipslip reverse faulting in the northern Tiaushan area.The principal rupture planes of earthquakes are NW-oriented.It is basically consistent with the strike of earthquake structure in its adjacent area.The direction of the principal compression stress P axis is nearly NS,and its inclination angle is small;while the inclination angle of the principal extensional stress T axis is large.It shows that the regional stress field is mainly controlled by the near-NS horizontal compressive stress.The direction of the maximum principal stress shows a gradation process of NNE-NS-NW from east to west. |
| |
| Keywords: | Northern Tianshan area Moderately strong earthquake Focal mechanism solution System cluster Stress field inversion |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国地震研究》浏览原始摘要信息 |
| 点击此处可从《中国地震研究》下载免费的PDF全文 |
