1. Department of Géotechnique, Environment, Risques Naturels et Sciences de la Terre, Université Gustave Eiffel, 44344 CEDEX Bouguenais, France
2. University Institute of Physics Applied to Sciences and Technologies, University of Alicante, Crta. San Vicente del Raspeig, s/n, 03080 Alicante, Spain
3. Department of Physics, Systems Engineering and Signal Theory, University of Alicante, Ctra. San Vicente del Raspeig, s/n, 03080 Alicante, Spain
4. Department Civil Engineering, University of Granada, 18071 Granada, Spain
5. Institut Français des Sciences et Technologies des Transports, de l’Aménagement et des Réseaux (IFSTTAR), Université Gustave Eiffel, 14-20 Boulevard Newton, Champs-sur-Marne, 77447 Marne la Vallée, France
6. Department of Earth Science and Research Centre for Geological Risk (CERI), Università di Roma “La Sapienza”, 00185 Roma, Italy
7. Geo2Siena, 53100 Siena, Italy
8. Department of Physics, University of Jaén, 23071 Jaén, Spain
9. Department of Earth and Environmental Sciences, University of Alicante, Ctra. San Vicente del Raspeig, s/n, 03080 Alicante, Spain