1. State Key Laboratory of Earthquake Dynamics Institute of Geology, China Earthquake Administration Beijing China
2. Department of Geology and Geological Engineering South Dakota School of Mines and Technology Rapid City South Dakota USA
3. Department of Earth, Planetary, and Space Sciences University of California Los Angeles California USA
4. Department of Geophysics, School of Earth and Space Science Peking University Beijing China
5. Institute of Earth Sciences Jaume Almera, Spanish National Research Council (Consejo Superior de Invees Científicas) Barcelona Spain