1. Seismology-Gravimetry; Royal Observatory of Belgium; Uccle Belgium
2. Littoral, Environnement et Sociétés; Université de La Rochelle and CNRS (UMR7266); La Rochelle France
3. Geology and Applied Geology Unit, Faculty of Engineering; University of Mons; Mons Belgium
4. Department of Meteorology and Geophysics; University of Vienna; Vienna Austria
5. Faculty of Science, Technology and Communication; University of Luxembourg; Esch-sur-Alzette Grand Duchy of Luxembourg
6. Laboratoire de Volcanologie, G-time, Département Géosciences, Environnement et Société; Université Libre de Bruxelles; Brussels Belgium