1. Bullard Laboratories Department of Earth Sciences University of Cambridge Cambridge UK
2. Indonesian Agency for Meteorology, Climatology, and Geophysics (BMKG) Jakarta Indonesia
3. The Research School of Earth Sciences Australian National University Canberra ACT Australia
4. Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung Indonesia
5. Faculty of Engineering Maranatha Christian University Bandung Indonesia