Ray Tracing Method in Horizontal Layered Medium Based on Matlab

Travel time calculation of seismic waves in horizontal stratified medium plays an important role in the earthquake location and crustal velocity studies. In this paper, 3 ray tracing methods in horizontally stratified medium are summarized and realized by using MATLAB software, and can be used to determine earthquake location and layered velocity studies. The efficiencies of the shooting method, the p parameter method and the improved p parameter method are compared. It is found that both the shooting algorithm and improved p parameter method can precisely track to the station of different epicentral distances, while the p parameter method only can track to the station of small epicentral distance. For the same layered Earth model, the shooting method is more efficiency than the improved parameter method.