Heba Rashed (*), Marzia Rovere (**), Elena Pecchioni (*), Fabiano Gamberi (**), Orlando Vaselli (*,***), Gabriele Bicocchi (*) & Franco Tassi (*,***)
(*) Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Florence, Italy.
(**) ISMAR-CNR, Via P. Gobetti 101, 40129 Bologna, Italy.
(***) IGG-CNR, Via La Pira 4, 50121 Florence, Italy.