libEMM: A fictious wave domain 3D CSEM modelling library bridging sequential and parallel GPU implementation.

This paper delivers a software - libEMM - for 3D controlled-source electromagnetics (CSEM) modelling in fictitious wave domain, based on the newly developed high-order finite-difference time-domain (FDTD) method on non-uniform grid. The numerical simulation can be carried out over a number of parallel processors using MPI-based high performance computing architecture. The FDTD kernel coded in C has been parallelized with OpenMP for speedup using local shared memory. In addition, the software features a GPU implementation of the same algorithm based on CUDA programming language, which can be cross-validated and compared in terms of efficiency. A perspective of libEMM on the horizon is its application to 3D CSEM inversion in land and marine environment. Program Title: libEMM CPC Library link to program files: https://doi.org/10.17632/p769t7c5bk.1 Developer's repository link: https://github.com/yangpl/libEMM Licensing provisions: GNU General Public License v3.0 Programming language: C, CUDA, Fortran, Shell External dependencies: MPI [1], FFTW [2], CUDA [3] Nature of problem: Controlled-source electromagnetics (CSEM) Solution method: High-order finite-difference time-domain (FDTD) on non-uniform grid by fictious wave domain transformation [1] https://www.mpich.org/ [2] http://fftw.org/ [3] https://developer.nvidia.com/cuda-toolkit [ABSTRACT FROM AUTHOR]