Stefania Candela (a), Stefano Mazzoli (b), Antonella Megna (c) & Stefano Santini (a)
"(a) Department of Basic and Foundations Sciences (DiSBeF), University of Urbino, Via Santa Chiara 27, 61029 Urbino, Italy E-mail: santini@fis.uniurb.it
(b) Department of Earth Sciences, Environmental and Resources,(DiSTAR), University of Naples Federico II, Largo San Marcellino 10, 80138 Naples, Italy
(c) National Institute of Geophysics and Volcanology (INGV), Via di Vigna Murata, 605, 00143 Roma, Italy"