EFISPEC3D is a computer program under double licenses (CeCILL V2 and GNU GPL V3) that solves the three-dimensional equations of motion \( \rho \ddot{u_{i}} = f_{i} + \tau_{ij,j} \) using a continuous Galerkin spectral finite element method (see EFISPEC3D main website). EFISPEC3D has been so far dedicated to ground motion simulations but could be used for any problems involving the three-dimensional equations of motion. See section References for more information about spectral-element methods.

EFISPEC3D is written in FORTRAN95 (version 1.0 contains a C subroutine to link the code with the mesh partitioning tool METIS). EFISPEC3D is portable on most Unix systems that have FORTRAN/C compilers and a MPI library. Actual sources are optimized to be compiled with Intel® FORTRAN compiler.

EFISPEC3D is free software. You can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.