Stephanie Grand¹, Magalì Matteodo¹, Anaïs Fayolle¹, Valentine Turberg¹, David Sebag², Pascal Vittoz¹ and Eric P Verrecchia¹, (1)University of Lausanne, Faculty of Geosciences and Environment, Lausanne, Switzerland, (2)University of Normandie, UNIROUEN, UNICAEN, CNRS, M2C, Rouen, France