The interaction between near-surface geology and seismic radiation determines the features of wave propagation in terms of path, amplification or damping of the seismic signal, which in certain cases might cause the so called site effect. Here, we consider the propagation of seismic waves in a geological site modeled as a granular material. The model equations have been integrated with null initial conditions by means of a finite element method for the spatial components and a finite difference scheme with respect to time evolution. The numerical results so obtained refer to the case of a homogeneous not layered domain with different physical conditions.
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