The combination of different methods, analytical and/or numerical, represents an effective tool for reducing the computational effort required by large-scale 3D numerical wave propagation from a half-space (containing the seismic source) into a localized region containing strong geological or topographical irregularities, such as sedimentary basins. This implies a substructuring of the problem studied, whereby the analysis of the source and wave propagation in the half-space (external region) is separated from that of the irregular region, including site effects or structure interaction. The main challenge of this approach is the coupling of the solutions typically obtained by different methods in the...

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