1. Department of Earth Sciences, University of Firenze, 50121 Firenze, Italy
2. Department of Agriculture, Food, Environment and Forestry, University of Firenze, 50144 Firenze, Italy
3. Department of Geosciences, University of Padova, 35131 Padova, Italy
4. Department of Mathematics and Geosciences, University of Trieste, 34128 Trieste, Italy
5. Centre of Civil Protection, University of Firenze, 50121 Firenze, Italy
6. Department of Planning, Soil Defense and Water Resources, Autonomous Region of Valle d’Aosta, Loc. Amérique 33, Quart, 11020 Aosta, Italy