Abstract
A 2‐D finite difference formulation of the elastic wave equation has been used to investigate seismo/acoustic scattering from laterally heterogeneous oceanic crust. In an effort to validate the use of this code to handle such problems, the same formulation has been used to solve the canonical problem of scattering of an acoustic wave from an infinite elastic circular cylinder. Analytical theory predicts that an acoustic wave will be scattered only into certain distinct azimuths after interaction with a cylinder of given elastic parameters. These scattering angles and amplitudes are very sensitive to both the frequency of the source and the diameter of the cylinder. The finite difference results of scattering of both a relatively broadband plane wave pulse and a series of monochromatic cw plane waves at different frequencies are presented. In general, the scattering pattern produced by the pulse source does not agree well with the analytical solution for the pulse center frequency. This is due to the relatively broad frequency band of the pulse. However, scattering patterns and amplitudes produced by the monochromatic cw plane wave sources do agree very well with the expected analytical solutions.
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