1. Department of Biological, Geological and Environmental Sciences, University of Catania, 95129 Catania, Italy
2. Department of Civil Engineering and Architecture, University of Catania, 95125 Catania, Italy
3. CRUST—Interuniversity Center for 3D Seismotectonics with Territorial Applications, 66100 Chieti Scalo, Italy
4. Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, 95125 Catania, Italy