*Shaoyang Li^1,2、Fuqiang Shi³、Marcos Moreno⁴、Jun'ichi Fukuda¹ (1.Earthquake Research Institute, University of Tokyo, Tokyo, Japan、2.Department of Earth and Environmental Sciences, The University of Iowa, Iowa City, IA, USA、3.Shaanxi Earthquake Agency, Xi’an, China、4.Departamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de Concepción, Concepción, Chile)