采用特定震源台站校正定位方法对九寨沟M_S7.0地震及其余震进行了精定位研究，结果显示九寨沟地震主震深度为19km左右，余震主要分布于5~15km深度范围；与单事件定位方法相比，其余震展布和断层的线性特征更吻合，更具有平面特征；与双差定位法相比，精定位事件覆盖范围更广。精定位结果显示，断层整体为虎牙断裂西北向的延伸，根据余震分布和特定震源区的校正项分布，认为此发震断层应分南、北两段；余震区长度为40km左右，西北段宽度为10km左右，东南段宽度为6.5km左右。

Relocation of the Jiuzhaigou earthquake and its aftershocks by using the source-specific station terms (SSTT) method has been performed in this paper. The results show that the Jiuzhaigou main shock is located at depth of about 19km,and the aftershocks are mainly distributed at the depth range of 5~15km. Compared with the results of single-event location method,the distribution of the aftershocks in our study is more consistent with the linear character of faults strike,and more likely to have plane character. Compared with the results of double-difference method,the spatial coverage of events could be wider. The results of relocation indicate that the faulting plate is from the northwest extension of the Huya fault. Based on the distribution of aftershocks and correction terms in the study area,we believed that the seismogenic fault could be divided into two sections,north and south. The length of aftershock area is approximately 40km,the width of northwest section is approximately 10km,and the width of southeast section is approximately 6.5km.

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国家自然科学基金（41804107）、深圳市深远海油气勘探技术重点实验室项目（ZDSYS20190902093007855）和深圳市科技计划（KQTD20170810111725321）共同资助