Almost 500 years ago, Italy's Campi Flegrei supervolcano erupted, spewing molten rock and thick plumes of smoke into the atmosphere for eight days straight, and literally forming a new mountain from the chunks of Earth it drew from below.
Now, researchers are warning that this vast, fiery cauldron could be ready to blow once more, with pressure building up over the past 67 years showing no signs of easing up. And just to put that into perspective, this supervolcano is responsible for one of the biggest eruptions on the planet.
"By studying how the ground is cracking and moving at Campi Flegrei, we think it may be approaching a critical stage where further unrest will increase the possibility of an eruption, and it's imperative that the authorities are prepared for this," says Christopher Kilburn from the University College London Hazard Centre.
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