山西及邻区S波速度模型研究

Research on S-wave Velocity Model in Shanxi and Its Surrounding Areas

利用2009~2018年山西地震台网记录到的S波走时,重新校对震相并增加Sb震相,采用区域速度拟合和批量定位比较残差的方法获得山西及邻区S波的速度结构。结果显示,通过S波实测走时与利用P波走时结合波速比得出的结论相近,误差在0.5%范围内,“山西2015地壳速度模型”能够满足地震台网日常工作需求。

This study intends to use the S-wave travel time recorded by the Shanxi network in 2009-2018, re-calibrate the seismic phase and increase the Sb phase, and use the regional velocity fitting and batch positioning to compare the residuals to obtain the velocity structure of the S wave in Shanxi and its neighboring regions. The results show that the S-wave measured travel time is similar to the conclusion obtained by using the P-wave travel time combined with the wave speed ratio. The “Shanxi 2015 Crustal Velocity Model” can meet the daily work requirements of the network.