1. Institute for Scientific Computation, Texas A&M University, College Station, TX 77840, USA
2. Department of Computational Technologies, North-Eastern Federal University, Yakutsk, Republic of Sakha (Yakutia) 677000, Russia
3. Department of Seismology, Earth Sciences Division, CICESE, Ensenada 22860, Baja California, Mexico
4. Department of Mathematics & Institute for Scientific Computation (ISC), Texas A&M University, College Station, TX 77843-3404, USA
5. Department of Geology and Geophysics, Texas A&M University, College Station, TX 77843-3115, USA