Feverish Effort Underway to Understand Mt. Vesuvius

Deposits from the 79 AD eruption in the archaeological site of Pompeii. Fallout and pyroclastic flow deposits were emplaced during events similar to the ones experienced during the 1980 eruption of St Helens (in the insets). Credit: Lucia Gurioli, University of Hawaii at Manoa; insets USGS/Cascades Volcano Observatory