1887

Abstract

Combining the staggered grid technique with Fourier spectral approximations of the wave equation has recently been used for modelling of 2D elastic wave propagation [1]. The present scheme models propagation of acoustic waves in a 3D medium with arbitrary density and vetocity variations, using a staggered grid for the spatial discretization. The accuracy achieved by combining staggered grids with the Fourier spectral technique is demonstrated for two subsurface models: A model with a free surface and a plane interface, by comparison with solutions obtained by using Cagniard-de Hoop technique. A model containing a fault, see Figure 1 -2, by comparisons between models sampled with different numbers of grid points per shortest wave length.

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/content/papers/10.3997/2214-4609.201410577
1992-06-01
2021-06-18
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201410577
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