{"references": ["Petersson, N.A. and B. Sjogreen (2015), \"Wave propagation in anisotropic elastic materials and curvilinear coordinates using a summation-by-parts finite difference method\", J. Comput. Phys. 299, pp. 820-841", "Petersson, N.A. and B. Sjogreen (2014), \"Super-grid modeling of the elastic wave equation in semi-bounded domains\", Comm. Comput. Phys. 16, pp. 913-955", "Sjogreen, B. and N.A. Petersson (2012), \"A fourth order accurate finite difference method for the elastic wave equation in second order formulation\", J. Sci. Comput. 52(1), pp. 17-48", "Petersson, N.A. and B. Sjogreen (2010), \"Stable and efficient modeling of anelastic attenuation in seismic wave propagation\". Comm. Comput. Phys. 12(1), pp. 193-225"]}

SW4 solves the 3-D seismic wave equations in the time domain using a 4th order accurate summation-by-parts finite difference method. SW4 implements a message passing programming model based on MPI and runs on Linux/Unix/OSX machines ranging from laptops to supercomputers with more than a hundred thousand cores.

This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. This is contribution LLNL-CODE-643337.