Ge Chen¹, Feng Ding², Weixing Wan³, Lianhuan Hu⁴, Xiukuan Zhao² and Jianyong Li⁵, (1)Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, (2)Institute of Geology and Geophysics Chinese Academy of Sciences, Beijing, China, (3)University of the Chinese Academy of Sciences, Beijing, China, (4)Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China, Beijing, China, (5)China Earthquake Networks Center, China Earthquake Administration, Beijing, China