利用河北台网sPn震相计算近震震源深度的初步研究

Calculating Focus Depth Using sPn Phase Recorded on Hebei Digital Seismic Network

以河北台网记录到的地震数据为基础,根据sPn震相所具有的特征对该震相进行精确识别,计算出2001年以来河北地震台网记录的2个代表性地震的震源深度,为了得到更加准确的震源深度,采用sPn震相计算出多个台站震源深度的平均值,将结果与中国地震台网中心给出的震源深度进行比对,2个地震的震源深度误差均比较小,说明该方法在日常工作中可以得到应用,为地震科研工作提供有利的依据。

On basis of seismic wave data recorded on Hebei digital seismic network, using sPn phase, focus depth of two typical earthquakes in Hebei is calculated, the residual error of the two earthquakes is much smaller than that of the result given by China earthquake networks center. Our result indicates that this method can be applied in daily work.