Stefano Aretusini¹, Arantzazu Nuñez Cascajero², Elena Spagnuolo³, Alberto Tapetado², Carmen Vazquez² and Giulio Di Toro⁴, (1)INGV (Istituto Nazionale di Geofisica e Vulcanologia), Roma, Italy, (2)Universidad Carlos III de Madrid, Electronic Technology Department, Madrid, Spain, (3)National Institute of Geophysics and Volcanology, Rome, Italy, (4)University of Padova, Department of Geosciences, Padova, Italy