王卫民^1,,
郝金来^2,3,
何建坤¹,
王洵¹,
赵连锋^2,3
1. 大陆碰撞与高原隆升实验室, 中国科学院青藏高原研究所, 北京 100101
2. 中国科学院地质与地球物理研究所, 北京 100029
3. 中国科学院地球科学研究院, 北京 100029

基金项目: 国家自然科学基金项目（41474036，41630210）资助


详细信息

作者简介: 王卫民, 副研究员, 主要从事地震学研究.E-mail:wangwm@itpcas.ac.cn

中图分类号: P315

收稿日期:2017-12-13
修回日期:2018-02-05
上线日期:2018-03-05

Rupture process of the 2013, Balochistan M_W7.7 earthquake, Pakistan

WANG WeiMin^1,,
HAO JinLai^2,3,
HE JianKun¹,
WANG Xun¹,
ZHAO LianFeng^2,3
1. Laboratory for Continent Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
3. Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China


MSC: P315

--> Received Date: 13 December 2017
Revised Date: 05 February 2018
Available Online: 05 March 2018


摘要
摘要:利用高分辨光学影像获取的同震水平位移场资料联合远场波形数据反演获得了2013年巴基斯坦俾路支M_W7.7地震的震源过程模型.结果显示这是发生在具有弧形铲状几何形态的Hoshab断层上的一次左旋走滑为主要运动特征的强烈地震事件.推断这种具有罕见运动模式的强烈地震是斜向应力场与特殊的断层几何形态共同作用的结果.研究工作中采用大数据量均匀分布的同震位移资料参与反演计算，结果表明这种以完整图像的形式使用位移场资料的方式可以克服资料可能存在的系统误差获得可信的结果.
关键词: 俾路支地震/
同震位移/
震源过程/
有限断层方法

Abstract:The source process model of the 2013 M_W7.7 Pakistan Balochistan earthquake was obtained by joint inversion of the far-field waveforms and the co-seismic horizontal displacements extracted from high-resolution optical images. The results show that this strong earthquake occurred on the listric and curved Hoshab fault with dominated motion of the left-lateral strike slip. We argued that this strong earthquake with rare motion pattern is the result of the interaction between the oblique stress field and the special fault geometry form. In the research work, a large number of co-seismic displacements with uniform distribution was involved in the inversion calculation, and the results show that the method of using the co-seismic displacements in the form of complete image can overcome the systematic error of the data to obtain reliable model.
Key words:Balochistan earthquake/
Co-seismic displacements/
Source process/
Finite fault method



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