2017年8月9日精河发生M_S6.6地震，随后发生一系列余震。本文采用PTD方法和新疆测震台网分析的震相数据，基于新疆“2015地壳速度模型”，计算了该地震序列的震源深度，得到M_S6.6主震震源深度约为14km，M_S≥2.5余震深度为9～18km。所有震相数据来自中国地震台网中心编目数据库。

An M_S6.6 earthquake occurred on August 9, 2017 in Jinghe County, Xinjiang Uygur Autonomous Region, which was followed by a series of aftershocks. Domestic and foreign scientific research institutions have obtained different results for the focal depth of the main shock. In this paper, PTD method is used to determine the focal depth of the earthquake sequence. The result of the main shock is 14km by using the data of Xinjiang Digital Seismic Network and the Xinjiang 2015 velocity model, and the focal depth of aftershocks above M2.5 is between 9~18km. All the seismic phase data is from the catalog database of China Earthquake Networks Center.

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上海市地震局科技专项（2017专2）、中国地震局监测司专项（17110402）共同资助