用sPn震相计算震源深度的初步分析与应用

Primary Analysis on the Seismic Source Depth Determination Using sPn Phase and Its Application

摘要:

用近震震相sPn与Pn波的到时差测定壳内近震深度的方法简捷准确。本文对2004年3月24日内蒙古东乌珠穆沁旗5.9级地震震中1 000 km范围内不同台站记录的sPn震相进行了初步分析,计算了该次地震的震源深度。还讨论了用sPn测定震源深度的可能性及该方法在日常工作中的应用问题。

Abstract:

The method using arrival-time difference between sPn and Pn phase of seismic wave to determine the depth of seismic resource in near region within crust is simple and accurate. In this paper, the sPn phase of Dongwuzhumuqin MS. 9 earthquake on March 24,2004, recorded by different seismic stations their epicentral distances are no more than 1 000 km in Inner Mongolia Autonomous Region are primary analyzed, and the depth of event focal is calculated. Meanwhile the possibility that using sPn phase to determine depth of seismic resource and application of this method to daily earthquake monitoring work are discussed.