1. Institute of Earthquake Science; China Earthquake Administration; 63 Fuxing Road,; Beijing; 100036; China
2. Institute of Geology; China Earthquake Administration; 63 Fuxing Road,; Beijing; 100036; China
3. Institute of Seismology; China Earthquake Administration; Wuhan; 430071; China
4. Survey Engineering Institute; Earthquake Administration of Sichuan Province; Ya'an; 625000; China