We present a finite-volume method for the modeling of wave propagation on irregulartriangular grids. This method is based on an integral formulation of the wave equationvia Gauss's theorem and on spatial discretization via Delaunay and Dirichlet tessellations. We derive the equations for both SH and P-SV wave propagation in 2-D. Themethod is of second-order accuracy in time. For uniform triangular grids it is alsosecond-order accurate in space, while the accuracy is first-order in space for nonuniformgrids.This method has an advantage over finite-difference techniques because irregularinterfaces in a model can be represented more accurately. Moreover, it may be computationally more efficient for complex models.
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