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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-04-28 and was most recently seen on 2026-04-28.
The Phlegraean Fields is a large volcanic caldera west of Naples, Italy. The Neapolitan Yellow Tuff eruption produced just 50 cubic kilometers. It is, however, one of relatively few volcanoes large enough to form a caldera. It is part of the Campanian volcanic arc, which includes Mount Vesuvius, about 9 km east of Naples. The Phlegraean Fields is monitored by the Vesuvius Observatory. Part of the city of Naples is built over it. The Phlegraean Fields' largest known eruptions have an estimated volcanic explosivity index (VEI) of 7. It is often called a supervolcano in popular media, although the accepted definition for that term is a volcano that has had an eruption with a VEI of 8, the highest level.
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