1. Laboratory of Seismic Mechanics; CEA, DEN, DANS, DM2S, SEMT, EMSI; F-91 191 Gif-sur-Yvette France
2. Institut Pascal; UMR 6602 CNRS/UBP/IFMA; BP 80026 63171 Aubière France
3. ISTerre, Université de Grenoble-Alpes; CNRS/IRD/IFSTTAR; BP 53 38 041 Grenoble France