用sPn与Pn波走时差测定近震震源深度的方法

Abstract

Abstract: In this paper, we derived the relationship between the travel time difference of sPn and Pn and the local earthquake focal depth. In these equations, the travel time difference of sPn and Pn is not related to the epicentral distance, only only depended on the regional crustal model and the focal depth. According to equation, we provided a simple and accurate method to determine local earthquake focal depth by using the travel time difference between phase sPn and Pn. This method has been used to determine the focal depths of two earthquakes of M_S6.1 and M_S5.6 occurred at the junction of Panzhihua and Huili, Sichuan on Aug.30 and 31, 2008. The results have been compared with those from other sources such as China Earthquake Network Center, showing that our results are accurate and reliable.

Key words: Focal depth, Travel time difference of sPn and Pn, critical epicentral distance

CLC Number:

P315

WANG Deng-wei. Determination Method of Local Earthquake Source Depth Using the Traveltime Difference of Pn and sPn[J]. EARTHQUAKE, 2011, 31(1): 12-19.

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Determination Method of Local Earthquake Source Depth Using the Traveltime Difference of Pn and sPn

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