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- W1808695790 abstract "SUMMARYWe present a procedure for the numerical computation of the seismic waves in realistic 3-D geo-models. The procedure is based on a parallel implementation of the Fourier pseudo-spectral method (FPSM) on staggered grids. FPSM solves spatial derivatives with optimal accuracy in domains which are discretized in easy-to-handle, structured meshes. The application of the presented procedure is therefore advantageous, in terms of both accuracy and simplicity of use, whenever the geo-model can be adequately sampled by a structured grid. To be applicable to a wide range of geophysical problems, the procedure implements the most important features needed for modelling the seismic waves propagation, that is intrinsic attenuation, seismic velocity anisotropy and irregular topography. The intrinsic attenuation is implemented by means of the generalized zener body GZB mechanical model. Orthorhombic symmetry is considered for the description of the seismic anisotropy. Irregular topography is approximated by a staircase of cubic cells and treated using an original approach based on discrete Fourier transforms of arbitrary length. Sharp impedance contrasts in the geo-model are handled by suitable averaging of the material properties to reduce phase misalignments and staircase effects due to the structured grid. Absorbing boundaries based on the convolutional perfectly matching layer technique are adopted. Finally, the efficiency of the proposed procedure is illustrated by a number of tests and examples." @default.
- W1808695790 created "2016-06-24" @default.
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- W1808695790 date "2010-09-24" @default.
- W1808695790 modified "2023-09-26" @default.
- W1808695790 title "Numerical simulation of seismic wave propagation in realistic 3-D geo-models with a Fourier pseudo-spectral method" @default.
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- W1808695790 doi "https://doi.org/10.1111/j.1365-246x.2010.04763.x" @default.
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