1. Researcher, Dipartimento di Ingegneria Civile e Ambientale, Univ. of Florence, Italy; and, Dept. of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM (corresponding author).
2. Researcher, Dipartimento di Ingegneria Biofisica ed Elettronica, Univ. of Genoa, Italy.
3. Associate Professor, School of Sustainable Engineering and the Built Environment and School of Earth and Space Exploration, Arizona State Univ., Tempe, AZ; formerly, Dept. of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM.
4. Full Professor, Dipartimento di Ingegneria Civile e Ambientale, Univ. of Florence, Italy.
5. Researcher, Center of Research and Advanced Education for Hydrogeological Risk Prevention, Lucca, Italy.