Instructions on how to install and use SPECFEM3D are available in the PDF manual located in directory doc/USER_MANUAL. Main developers: Dimitri Komatitsch and Jeroen Tromp To contribute, please follow the guidelines located on specfem3d github wiki: https://github.com/geodynamics/specfem3d/wiki In particular contributions should follow a set of best practices defined at: https://github.com/geodynamics/specfem3d/wiki/Best-Practices and help on how to submit these contributions is given at: https://github.com/geodynamics/specfem3d/wiki/Git-tips-for-developers