1. Guangdong Provincial Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, China.
2. Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, USA.
3. Institut de Physique du Globe de Strasbourg, Université de Strasbourg/CNRS, Strasbourg, France.
4. Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, USA.
5. Agency for Meteorology Climatology and Geophysics, Jakarta, Indonesia.
6. Earthquake Research Institute, University of Tokyo, Tokyo, Japan.