[1] CNR, IRPI, I-87030 Arcavacata Di Rende, Italy
[2] Univ Calabria, Dept Math, Ctr High Performance Comp, I-87036 Cosenza, Italy
[3] SUNY Buffalo, Ctr Geohazards Studies, Buffalo, NY 14260 USA
[4] Univ Tokyo, Univ Museum, Dept Museum Collect Utilizat Studies, Bunkyo Ku, Tokyo 1130033, Japan