Patrick Cordier¹, Vahid Samaee², Hosni Idrissi³, Julien Gasc⁴, Sylvie Aude Demouchy⁵, Fabrice Barou⁵ and Sanae Koizumi⁶, (1)University of Lille 1, Villeneuve d'Ascq, France, (2)Universiteit Antwerpen, Electron Microscopy for Materials Science, Antwerpen, Belgium, (3)Universiteit Antwerpen, Antwerpen, Belgium, (4)Ecole Normale Supérieure Paris, Laboratoire de Géologie, Paris, France, (5)Géosciences Montpellier, Montpellier Cedex 05, France, (6)Earthquake Research Institute, University of Tokyo, Tokyo, Japan