1. Associate Professor, State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, P.R. China.
2. Professor, Dept. of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401 (corresponding author).
3. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401.
4. Coordinator, Landslide Hazards Program, US Geological Survey, Denver, CO 80225.
5. Teaching Associate Professor, Dept. of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401.