基于近台数据的2017-06巴东M4.3地震序列震源深度研究

摘要

We calculate the focal depth of the Badong M4.3 earthquake sequence and analyze the depth error using the data from the Three Gorges telemetry network and the mobile station.The results show that the sequence of the focal depth is mainly distributed in the 3-5 km;mobile station observation can obviously improve the accuracy of the sequence determination of focal depth,and focal depth error is reduced from 1.8 km to 1.1 km.It is considered that the focal depth in the Three Gorges telemetry network (especially after setting up the mobile station) can be determined by direct wave method.%利用三峡遥测地震台网和流动加密台资料计算2017-06巴东M4.3地震序列震源深度并分析其深度误差.结果显示,序列震源深度主要分布在3～5 km;流动加密台观测明显改善了震源深度测定精度,其震源深度误差由平均1.8 km减少到1.1 km.研究认为,直达波法测定三峡遥测台网(特别是布置流动加密台后)网内地震可获得较高精度的震源深度.