Frkchet derivatives for curved interfaces in the ray approximation

  title={Frkchet derivatives for curved interfaces in the ray approximation},
  author={Linda M. Nowack and Jeff A. Lyslo},
The sensitivity of ray and beam theoretical seismograms to changes in velocity models and curved interfaces is discussed in this paper. Previous results from Nowack & Lutter (1988) give the derivatives of travel-time and ray amplitude with respect to changes of smoothly varying velocities. These derivatives are required to perform linearized maximum likelihood inversions for structure. In the ray approximation, smooth interfaces are incorporated by applying Snell’s law locally, correcting… CONTINUE READING