We propose a modified pseudo-spectral method for numerical simulation of wave propagation in general anisotropic media. This approach uses rotated staggered grid configuration to implement spatial Fourier derivatives operators. It overcomes some shortages of the pseudo-spectral scheme based on the standard staggered grids, and thus can be efficiently used to simulate seismic wave propagation in anisotropic media with symmetries lower than orthorhombic. Synthetic examples demonstrate that this approach can obtain dispersion-free wave propagation modelling for those complex anisotropic media.


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