THE III EPOCH (5,500 - 3,800 YEARS) Underneath the vineyards and thermal spas in southern Italy, magma churns to create one of the world’s most active volcanic systems in a region known as Campi Flegrei. Outside of Naples, the 'burning fields' is a bowl-shaped depression peppered with craters. Smelly steam oozes from vents, mud gurgles from pools, and small earthquakes send shocks to hundreds of thousands of residents living in the volcano’s mouth. What are supervolcanoes and should we really be worried about them? | The Washington Post
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