1. Laboratory of Seismology and Physics of Earth’s Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China, husq@ustc.edu.cn
2. Hubei Subsurface Multi‐scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, Hubei Province, China
3. Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, Missouri 63108 U.S.A.
4. Also at Mengcheng National Geophysical Observatory, University of Science and Technology of China, Mengcheng 233500, Anhui, China.