Coupled Discontinuous Galerkin and Finite-Difference Schemes for Simulation of Near- Surface Seismic Wave Propagation
V.V. Lisitsa and V.A. Cheverda
Journal name: Seismic Technology
Issue: Vol 11, No 4, October 2014 pp. 1 - 11
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The paper presents an original approach to simulation of seismic wave propagation in complex near surface and surface topography conditions. The algorithm couples the discontinuous Galerkin and finite-difference methods applied to different parts of the modelling domain. Namely, the highly accurate but computationally costly former approximation is restricted to the upper part, whereas the computationally cheap latter scheme is applied to the remaining larger part of the model. Thus the hybrid approach makes use of the advantages of both methods: the accuracy of discontinuous Galerkin and the efficiency of finite-difference approximations.