Institute of Earthquake Engineering;
Seismological Bureau of Sichuan Province;
Chengdu 610041;
China;
National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation;
Chengdu University of Technology;
Chengdu 610059;
China;
Institute of Geology;
Department of Earth Sciences;
ETH Zentrum;
CH-8092 Ziirich;
Switzerland;
Center for Earthquake Research and Information;
University of Memphis;
3890 Central Avenue;
Memphis;
TN 38152;
USA;