Institute of Seismology and Institute of Applied Geophysics, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi, Taiwan, Chai-Yi, 621 Taiwan
Department of Earth Sciences and Institute of Geophysics, National Central University, No.300, Jhongda Rd., Jhongli City, Taoyuan County 320, Taiwan, Chung Li, 320 Taiwan
Department of Earth and Atmospheric Sciences, Saint Louis University, Saint Louis, Missouri 63103, USA, Saint Louis, 63103 United States