Anna B Perttu¹, Corentin Caudron², Jelle D Assink³, Dirk Metz⁴, Benoit Taisne⁵, Dorianne Tailpied¹, C Hilbert⁶, Brian K Perttu⁷, David Fee⁸, Dini Nurfiani¹, Muzli Muzli⁹ and Oystein L Andersen¹⁰, (1)Earth Observatory of Singapore, Singapore, Singapore, (2)Ghent University, Department of Geology, Ghent, Belgium, (3)Royal Netherlands Meteorological Institute, R&D Seismology and Acoustics, De Bilt, Netherlands, (4)University of Oxford, Dept. of Earth Sciences, Oxford, United Kingdom, (5)Asian School of the Environment, Singapore, Singapore, (6)University of Strasbourg and CNRS, School and Observatory of Earth Sciences, Stasbourg, France, (7)Nanyang Technological University, Singapore, Singapore, (8)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (9)Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore, (10)Øystein Lund Andersen Photography, Jakarta, Indonesia