1. Department of Earth Sciences Bullard Laboratories University of Cambridge Cambridge UK
2. Department of Earth Sciences COMET Bullard Laboratories University of Cambridge Cambridge UK
3. Agency for Meteorology, Climatology, and Geophysics (BMKG) Jakarta Indonesia
4. Global Geophysics Research Group, Institut Teknologi Bandung Bandung Indonesia
5. Faculty of Engineering Maranatha Christian University Bandung Bandung Indonesia