Xueyan Li, Qingli Luo, State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, No. 92, Weijin Road, Nankai District, Tianjin 300072, China, China; Wenyu Gong, China Earthquake Administration, China; Minglong Xue, State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, No. 92, Weijin Road, Nankai District, Tianjin 300072, China, China