1. Physics Deparment “E. Pancini” University of Naples Federico II Naples Italy
2. DISTAV University of Genoa Genoa Italy
3. Istituto Nazionale di Geofisica e Vulcanologia (INGV) Milan Italy
4. GFZ German Research Centre for Geosciences Helmholtz Centre Potsdam Potsdam Germany
5. Department of Physics and Astronomy Alma Mater Studiorum University of Bologna Bologna Italy