1. Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Hongshan Side Rd., Wuhan, Hubei 430071, China; Dept. of Mechanical Engineering, Univ. of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA
2. Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Hongshan Side Rd., Wuhan, Hubei 430071, China; Corresponding author,
3. Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Hongshan Side Rd., Wuhan, Hubei 430071, China
4. Dept. of Mechanical Engineering, Univ. of Houston, 4800 Calhoun Rd., Houston, TX 77204, USA