1. Department of Earth and Space Sciences, Southern University of Science and Technology, Office 309, Building 9, Innovation Park, 1088 Xueyuan Avenue, Xili, Nanshan District, Shenzhen 518055, Guangdong Province, People’s Republic of China, sunyc@sustc.edu.cn
2. Also at Department of Geophysics, School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, Hubei Province, People’s Republic of China.
3. Department of Earth and Space Sciences, Southern University of Science and Technology, Office 303, Building 9, Innovation Park, 1088 Xueyuan Avenue, Xili, Nanshan District, Shenzhen 518055, Guangdong Province, People’s Republic of China, zhangwei@sustc.edu.cn
4. Department of Earth and Space Sciences, Southern University of Science and Technology, Office 301, Building 9, Innovation Park, 1088 Xueyuan Avenue, Xili, Nanshan District, Shenzhen 518055, Guangdong Province, People’s Republic of China, chenxf@sustc.edu.cn