作者单位:Xiaodong Song(Institute of Geophysics and Geodynamics,School of Earth Sciences and Engineering,Nanjing University;Department of Geology,University of Illinois at Urbana-Champaign,USA)Richard Weaver(Department of Physics,University of Illinois at Urbana-Champaign,USA)Liangqing Zhou(Institute of Geophysics,China Earthquake Administration)