Phlegraean Fields, Campania. The eruption of the Neapolitan Yellow Tuff is the second most important in the Campania region (the first occurred in 37,000 BC). During the eruption, several dozen square kilometers of magma were emitted from a center located in the Phlegraean Fields, covering an area of approximately 1,000 square kilometers. Deposits associated with the Neapolitan Yellow Tuff eruption are found in the Naples-Phlegraean Fields area and in the Campanian Plain, extending as far as the Apennine foothills. The Neapolitan Yellow Tuff eruption was accompanied by the formation of a caldera, causing the subsidence of an area encompassing part of the Phlegraean Fields and the Bay of Pozzuoli.
