1. Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione di Palermo, Palermo, Italy
2. DIATI-Department of Environment, Land and Infrastructure Engineering, Politecnico di Torino, Turin, Italy
3. Regione Piemonte, Environmental, Energy and Territory Directorate, Division of Sustainable Development, Biodiversity and Natural Areas, Torino, Italy;
4. School of Environmental Sciences, Jawaharlal Nehru University, Delhi, India