1. International Institute of Earthquake Engineering and Seismology, Tehran, Iran
2. International Center for Theoretical Physics (ICTP), Trieste, Italy
3. Observatoire de la Côte d'Azur, Université Côte d'Azur, IRD, CNRS, Géoazur UMR 7329, France
4. Laboratoire de Geologie, Ecole Normale Superieure,75231 Paris Cedex 05, France