1. University of Nice-Sophia Antipolis, CNRS, OCA, UMR Géoazur, 250 rue A. Einstein, 06560 Valbonne, France
2. Middle East Technical University, Department of Geological Engineering, 06531-Ankara, Turkey
3. University of Aberdeen, School of Geosciences, Meston Building, King's College, Aberdeen AB24 3UE, UK
4. CNRS, UMR 7193, ISTeP, Case 117, 4 place Jussieu, F-75252 Paris cedex 05, France
5. National Academy of Sciences of Ukraine, Institute of Geophysics, Kiev, Ukraine