Dissemination of scientific results to the general public has become increasingly important in our society. When science deals with natural hazards, public outreach is even more important: on the one hand, it contributes to hazard perception and it is a
necessary step toward preparedness and risk mitigation; on the other hand, it contributes to establish a positive link of mutual
confidence between scientific community and the population living at risk. The existence of such a link plays a relevant role in
hazard communication, which in turn is essential to mitigate the risk. In this work, we present a tool that we have developed to
illustrate our scientific results on pyroclastic flow propagation at Vesuvius. This tool, a CD-ROM that we developed joining
scientific data with appropriate knowledge in communication sciences is meant to be a first prototype that will be used to test the
validity of this approach to public outreach. The multimedia guide contains figures, images of real volcanoes and computer
animations obtained through numerical modeling of pyroclastic density currents. Explanatory text, kept as short and simple as
possible, illustrates both the process and the methodology applied to study this very dangerous natural phenomenon. In this first
version, the CD-ROM will be distributed among selected categories of end-users together with a short questionnaire that we have
drawn to test its readability. Future releases will include feedback from the users, further advancement of scientific results as well as a higher degree of interactivity