1. School of Earth and Space Sciences, Peking University , Beijing 100871, China
2. Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
3. Hebei Hongshan National Geophysical Observatory for Thick Sediments and Seismic Hazards, Peking University , Beijing 100871, China
4. Department of Earth Sciences, University of Southern California , Los Angeles, CA 90089, USA