Piergiorgio Scarlato¹, Elisabetta Del Bello², Tullio Ricci¹, Ulrich Kueppers³, Bruce F Houghton⁴ and Jacopo Taddeucci², (1)National Institute of Geophysics and Volcanology, Sezione di Roma 1, Rome, Italy, (2)National Institute of Geophysics and Volcanology, Rome, Italy, (3)Ludwig Maximilian University of Munich, Earth & Environmental Sciences, Munich, Germany, (4)Univ Hawaii Manoa, SOEST, Honolulu, HI, United States