1. Institute of GeodynamicsNational Observatory of Athens Athens Greece
2. Université Nice Sophia Antipolis, CNRS, IRD, Observatoire de la Côte d'Azur, Géoazur UMR 7329 Valbonne France
3. Instituto de Ciencias de la Tierra Jaume Almera, ICTJA‐CSIC Barcelona Spain
4. Institute of GeophysicsETH Zurich Zürich Switzerland
5. MINES ParisTech, PSL Research University, Centre de Geosciences Fontainebleau France
6. Lamont‐Doherty Earth ObservatoryColumbia University New York New York USA
7. GEOMAR Helmholtz Centre for Ocean Research, Kiel Kiel Germany
8. Commission for the Geological Map of the World Paris France
9. Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS Paris France