Any technique for synthesizing seismograms in an isotropic model, having continuous variation of velocities with depth, can be easily adapted to the synthesis of seismograms in a transversely isotropic model. The only changes necessary are modifications in the calculation of turning radii and delay times τ(p) and substitutions of functions that depend on ray parameter in the reflection transmission coefficients. An example synthesis of S waves interacting with a transversely isotropic D″ layer illustrates an alternative hypothesis for explaining differences in the arrival time of ScSH versus ScSV at distances greater than 75°.

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