1. Université Côte d'Azur, IRD, CNRS, Observatoire de la Côte d'Azur, Géoazur Valbonne France
2. High Pressure and Temperature Laboratory, Department of Earth Sciences Utrecht University The Netherlands
3. Now at Geoscience and Engineering Department Delft University of Technology Delft The Netherlands
4. Seismological Laboratory, California Institute of Technology Pasadena CA USA