[1] William Lettis & Associates Inc, San Rafael, CA USA
[2] William Lettis & Associates Inc, Walnut Creek, CA USA
[3] URS Corp, Pasadena, CA USA
[4] Univ Memphis, CERI, Memphis, TN 38152 USA
[5] CALTECH, Seismol Lab, Pasadena, CA 91125 USA
[6] Gujarat State Petr Corp, Kanpur, Uttar Pradesh, India
[7] Indian Inst Technol, Dept Earthquake Engn, Roorkee, Uttar Pradesh, India
[8] Univ Calif Los Angeles, Los Angeles, CA USA
[9] US Geol Survey, Pasadena, CA 91106 USA
[10] M Tuttle & Associates, Georgetown, MD USA
[11] Georgia Inst Technol, Atlanta, GA 30332 USA
[12] Univ So Calif, Los Angeles, CA USA
[13] Univ Texas, Austin, TX 78712 USA
[14] Indian Inst Technol, Kanpur, Uttar Pradesh, India
[15] Univ Nevada, Reno, NV 89557 USA
[16] Globus Engn, San Pedro, CA USA
[17] JP Singh & Associates, El Sobrante, CA USA
[18] Univ Calif Berkeley, Berkeley, CA 94720 USA
[19] Calif Dept Water Resources, Sacramento, CA USA
[20] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA
[21] Indian Inst Technol, Bombay 400076, Maharashtra, India
[22] PSM Consulting, Seattle, WA USA
[23] George Washington Univ, Washington, DC USA