An Efficient Finite-Difference Stencil with High-Order Temporal Accuracy for Scalar Wave Modeling

Solving a scalar wave equation by the finite-difference (FD) method is key step for advanced seismic imaging, in which numerical accuracy significantly affected FD stencil. High-order spatial and temporal approximations of stencil can effectively improve mitigate dispersion error. However, huge costs high-order stenciling computation storage hinder application large-scale modeling. In this paper, we propose new efficient with The has radial shape, including standard cross-stencil rotated (π/4) degree, it reach sixth-order time approximation. Compared well-known cross-rhombus stencil, involves fewer grid nodes thus higher computational efficiency, especially cases. Dispersion stability analyses show that great improvements mitigating error problem compared conventional methods. Numerical execution an economical feasible