Diffraction of P Waves by the Core and an Inhomogeneous Mantle

Abstract

The theory for diffraction of elastic waves by a spherical interface is extended to an inhomogeneous velocity structure. The decay constant for P waves in the core shadow is evaluated numerically for several possible models of the Bullen region D” and the behaviour compared with the asymptotic theory. The spectral amplitudes across the core shadow boundary of two of these models are presented. These theoretical and numerical methods allow spectral amplitudes for a wide frequency range to be interpreted. Copyright © 1970, Wiley Blackwell. All rights reserved