1. Department of Earth and Environmental Sciences, University of Milano‐Bicocca Piazza dell'Ateneo Nuovo, 1 20126 Milano MI Italy
2. SHOM, 29228 Brest cedex 2 France
3. Istituto Nazionale di Geofisica e Vulcanologia Sezione Roma 2 Roma Italy
4. Faculty of Environmental Science and EngineeringBabes‐Bolyai University Cluj‐Napoca Romania
5. Applied Research LaboratoryPennsylvania State University State College PA 16801 USA