1. DiSTAR Università di Napoli Federico II Napoli Italy
2. Consiglio Nazionale delle RicercheIGAG Rome Italy
3. Department of Mathematics and Geosciences University of Trieste Trieste Italy
4. National Institute of Geophysics and VolcanologyVesuvius Observatory Napoli Italy
5. Department of Chemical and Geological Sciences University of Modena and Reggio Emilia Modena Italy
6. Lamont‐Doherty Earth Observatory Columbia University Palisades NY USA