1. Research Associate, Dept. of Civil and Environmental Engineering, Univ. of Houston, N107 Engineering Bldg 1, Houston, TX 77004 (corresponding author).
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Houston, N107 Engineering Bldg 1, Houston, TX 77004.
3. Research Associate, School of Ocean and Earth Sciences and Technology, Univ. of Hawaii, 1680 East-West Rd, Honolulu, HI 96822; Earthquake Science Center, United States Geological Survey, 345 Middlefield Rd MS 977, Menlo Park, CA 94025.