Pirrotta C. (*), Barbano M.S. (*), Argnani A. (**), Pantosti D. (***), De Martini P.M. (***) & Venuti S. (*)
(*) Department of Biological, Geological and Environmental Sciences, Catania (Italy). (**) Institute of Marine Science - National Research Council, Bologna (Italy). (***) Istituto Nazionale di Geofisica e Vulcanologia, Rome (Italy).