Institute of Geology, China Earthquake Admin., P.O.Box 9803 Qijiahuozi, Beijing, 100029, China ; Department of Earth and Space Sciences/UCLA, 595 Charles Young Dr, Los Angles, CA 90095- 1567, United States
Institute of Earthquake Science, China Earthquake Admin., 62 Fuxing Rd, Beijing, 100036, China ;
Institute of Geology, China Earthquake Admin., P.O.Box 9803 Qijiahuozi, Beijing, 100029, China ;
Institute of Geology, China Earthquake Admin., P.O.Box 9803 Qijiahuozi, Beijing, 100029, China ;
Sichuan Seismological Bureau, Chengdu, Sichuan, 610041, China ;