1. Seismological Center, Central Weather Bureau, Taipei 10048, Taiwan, hchsu@scman.cwb.gov.twdayi@scman.cwb.gov.twpu@scman.cwb.gov.tw
2. Also at Department of Geosciences National Taiwan University, Taipei 10617, Taiwan.
3. Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan, tailintseng@ntu.edu.tw, drymwu@ntu.edu.tw
4. Also at Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan.
5. Department of Earth Sciences, National Cheng Kung University, Tainan 70101, Taiwan, ljegay1111@gmail.com