*Lian-Feng Zhao^1,3, Xiao-Bi Xie⁴, Geng Yang^2,1, Zhen-Xing Yao¹ (1.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, 2.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China., 3.Heilongjiang Mohe Observatory of Geophysics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China., 4.Institute of Geophysics and Planetary Physics, University of California at Santa Cruz, CA95064, USA)