f Geophysical applications using finite difference solutions to the Eikonal equation

Podvin and Lecomte [1] recently reported an efficient algorithm to solve the eikopal equation in 2D and 3D by a method based on finite differences. The method cap be interpreted as a wavefront extrapolation process that starts at the source location and proceeds on an expanding square box. The algorithm described in Podvin and Lecomte takes into account Huyghens principle and provides accurate travel times even in the presence of extremely severe slowness constrasts . The purpose of this paper is to present important geophysical applications using this new algorithm.