1. Chinese Academy of Geological Sciences Beijing 100037 China
2. SinoProbe Center Chinese Academy of Geological Sciences and China Geological Survey Beijing 100037 China
3. Laboratory of Seismology and Physics of the Earth's Interior, School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China
4. China University of Geosciences (Beijing), School of Geophysics and information technology Beijing 100083 China
5. National Geophysical Observatory at Mengcheng University of Science and Technology of China Mengcheng 233500 China