1. Associate Professor, Division of Engineering, Colorado School of Mines, Golden, CO 80401.
2. Research Assistant, Dept. of Geological Sciences, Univ. of California, Santa Barbara, CA 93106.
3. Research Structural Engineer, U.S. Geological Survey, 525 South Wilson Ave., Pasadena CA 91106.
4. Geophysicist, U.S. Geological Survey, MS 966, Box 25046, Denver, CO 80225.