Strong Wen, Graduate Institute of Seismology National Chung Cheng University, Department of Earth and Environmental Sciences, Chiayi, Taiwan, Yi-Zen Chang, NCREE National Center for Research on Earthquake Engineering of Taiwan, Taipei, Taiwan, Jheng-Yan WU, National Chung Cheng University, Chiayi, NULL, Taiwan and Guan-Ting Chen, Institute of Seismology, National Chung Cheng University, Chiayi, Taiwan