Tomographic inversion of travel time in terms of depth parameters

Resumen

Un this study a method was developed for generating the partial derivatives of the travel time with respect to depth for an isovelocity line from a bi- dimensional model with lateral variation. This allows to solve the linearized Inverse System, using both param-eters (velocity and depth) sequentially or simultaneously. For the calculation of travel time, slowness and derivatives, the media was divided in triangular regions, where the propagation velocity gradient of the waves is constant.

For the inversion procedure, SVD was used with regularization. The method can be used to locate discontinuites of irregular topography. Samples are presented with real and synthetic data.