Europe’s closest thing to a supervolcano has been stirring for the past 20 years, culminating in a significant spike in seismic activity since the beginning of 2022. Naturally, these developments have got people’s bottoms squeaking, although the likelihood of a full-blown eruption is something scientists are still trying to calculate. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Known as the Campi Flegrei caldera , the threatening 13-kilometer-wide (8-mile) volcanic field sits beneath a densely populated area in Italy’s Campania region, with towns like Pozzuoli and part of the city of Naples built right on top of it. Unlike your typical cone-shaped mountain volcano, the caldera is made up of a series of sprawling faults spread ove

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