Lara Bertello (a), Matteo Berti(a) & Silvia Castellaro (b)
(a) Department of Earth Sciences, University of Bologna, Via Zamboni, 67, 40127, Bologna, Italy. E-mail: lara.bertello2@ unibo.it
(b) Department of Physics and Astronomy, University of Bologna, Viale Berti Pichat, 6/2, 40127, Bologna, Italy.