1 Department of Computer Science,College of Engineering University of the Philippines Diliman bongolan@dcs.upd.edu.ph 2 Department of Biology, Ecology and Earth Sciences, University of Calabria 3 Department of Mathematics and Computer Science, University of Calabria 4 CNR-IRPI, Cosenza, Italy A Probabilistic Approach to Risk Mapping for Mt. Etna VENA PEARL BOÑGOLAN 1 , ROCCO RONGO 2 , VALERIA LUPIANO 2 ,DONATO D‟AMBROSIO 3 , WILLIAM SPATARO 3 AND GIULIO IOVINE 4