1. Research Civil Engineer, United States Geological Survey, Menlo Park, CA 94025; and Adjunct Faculty, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90025 (corresponding author).
2. Associate Professor, Geotechnical, Earthquake, and Risk Engineering, California Polytechnic State Univ., San Luis Obispo, CA 93407.
3. Research Assistant Professor, Civil and Environmental Engineering, Tufts Univ., Medford, MA 02155.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Berkeley, CA 94720.
5. Associate Professor, Middle Eastern Technical Univ., Ankara, Turkey.
6. Taisei Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Berkeley, CA 94720.
7. Brunsfield Professor, Geotechnical Engineering, Dept. of Civil Engineering, UTAR, Jalan Genting Klang, Setapak 53300, Kuala Lumpur Malasia.
8. Professor, Dept. of Architechture and Building Engineering, Tokyo Institute of Technology, Tokyo, 152-8550 Japan.