1. Department of Earth Sciences, University of California, Riverside, CA 92521
2. Program in Geosciences, University of Texas, Richardson, TX 75080
3. Earth and Environmental Sciences Division, M.S. D462, Los Alamos National Laboratory, Los Alamos, NM 87545
4. Department of Geological Sciences, San Diego State University, San Diego, CA 92182
5. Centro de Investigacion Cientifica y de Educacion Superior de Ensenada, Baja California, Mexico
6. Department of Physics, Golden West College, Huntington Beach, CA 92647
7. Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, IN 47907
8. 1148 Sentinel Court, Merced, CA 95340
9. Department of Geological Sciences and Institute for Crustal Studies, University of California, Santa Barbara, CA 93106