| 2014年2月12日新疆于田MS7.3级地震主震及余震序列重定位研究 |
| |
| 引用本文： | 张广伟,雷建设,孙长青.2014年2月12日新疆于田MS7.3级地震主震及余震序列重定位研究[J].地球物理学报,2014,57(3):1012-1020. |
| |
| 作者姓名： | 张广伟 雷建设 孙长青 |
| |
| 作者单位： | 中国地震局地壳应力研究所地壳动力学重点实验室, 北京 100085 |
| |
| 基金项目： | 基本科研业务专项（ZDJ2012-19，ZDJ2013-12）和国家自然科学基金项目（41304037）资助. |
| |
| 摘 要： | 本研究采用基于贝叶斯理论的绝对定位方法对2014年2月12日新疆于田MS7.3级地震进行绝对定位，得到震中位置为82.56°E、36.04°N、震源深度为12.3 km；采用双差定位法对254个地震序列进行相对定位，得到101个重定位事件.结果显示，主震位于阿尔金断裂带西南端多个分支断裂的交汇处.余震震源主要分布范围在5~10 km深度之间，主震处余震代表的断层面较为陡立，且余震序列呈现出明显的西南向纯单侧扩展模式.沿阿尔金断裂带主震的北东向民丰震区本次地震后显示一个明显的地震丛集，说明本次主震对该震区具有触发作用.
|
| 关 键 词： | 于田地震 贝叶斯绝对定位 双差定位 阿尔金断裂带 |
| 收稿时间： | 2014-02-17 |
Relocation of the 12 February 2014 Yutian,Xinjiang, mainshock (MS7.3) and its aftershock sequence |
| |
| ZHANG Guang-Wei,LEI Jian-She,SUN Chang-Qing.Relocation of the 12 February 2014 Yutian,Xinjiang, mainshock (MS7.3) and its aftershock sequence[J].Chinese Journal of Geophysics,2014,57(3):1012-1020. |
| |
| Authors: | ZHANG Guang-Wei LEI Jian-She SUN Chang-Qing |
| |
| Institution: | Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, CEA, Beijing 100085, China |
| |
| Abstract: | Using the Bayesian absolute location method,we obtained the Yutian, Xinjiang, earthquake (MS7.3) epicenter parameters, 82.56°E, 36.04°N, and 12.3 km in depth. We also relocated the 254 aftershocks using the double-difference algorithm, and finally obtained 101 relocated earthquakes. Our results show that the mainshock is located at the junction of several branches of the southwestern Altyn Tagh fault zone. The aftershocks are mainly located at 5~10 km depth. The fault plane reflected by aftershocks around the mainshock is very steep, and these aftershocks clearly demonstrate a purely unilateral extension in southwest direction. There is a clear event cluster at the Minfeng seismic area in the NE direction of the Altyn Tagh fault zone, which may be triggered by the mainshock. |
| |
| Keywords: | Yutian earthquake Bayesian absolute location Double-difference relocation Altyn Tagh fault zone |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
