1. Department of Earth Science, Environment, and Life, University of Genoa, Corso Europa 26, 16132 Genoa, Italy
2. Department of Earth and Environmental Sciences, University of Pavia, Via A. Ferrata, 1 I-27100 Pavia, Italy
3. Department of Earth Sciences, University of Hamburg, Grindelallee 48, D-20146 Hamburg, Germany
4. Department of Geosciences, University of Padova, Via G. Gradenigo 6, I-35131 Padova, Italy
5. Department of Civil Engineering and Architecture, University of Pavia, Via A. Ferrata 3, I-27100 Pavia, Italy