Modeling volcanic hazards on Italy's Mt. Vesuvius

Mt. Vesuvius, an Italian volcano with a history of explosive eruptions, poses a serious threat to the nearly one million people who live near its flanks, but this hazard is difficult to quantify.

Neri et al. used numerical simulations based on flow transport models to analyze possible scenarios of the geographic distribution of volcanic debris as it would evolve during a medium-scale eruption. In particular, they focused on hazards posed by pyroclastic density flows, which are rivers of hot volcanic debris and gas that course down a volcano during an eruption and are the most destructive and deadliest of volcanic phenomena. The simulations showed that local topography, such as nearby Mt. Somma, significantly influences the flow around Vesuvius. Their results also reveal that low-fountaining, boiling-over events appear to be the most hazardous scenarios.