Andrea Manconi(*), Daniele Giordan(*), Paolo Allasia(*), Marco Baldo(*) & Giorgio Lollino(*)
(*) Geohazard Monitoring Group, CNR-IRPI, Strada delle Cacce, 73 - 10135 Torino, Italy. Corresponding author (Email: andrea.manconi@irpi.cnr.it, Tel: +39 011/3977829, Fax: +39 011/3977821).