TheoreticalPKP seismograms near the caustic calculated by sum of reflected waves

Summary This paper gives some examples of theoretical seismograms of PKP waves near the caustic. Seismograms of refracted waves for the original medium are compared with seismograms composed as a sum of the reflected waves, generated at boundaries of a substitute medium. All seismograms are calculated by zero approximation of the ray theory. The influence of some parameters of the source function and of the substitute medium on the results is shown.