These Hidden Volcanoes Erupt With the Force of Nuclear Weapons

Volcanic eruptions produce some stunning scenes, the eruption of the Calbuco volcano in Chile being one recent example. Calbuco fits the stereotypical image of a volcano: a large, angry mountain rising up into the sky, the same kind of volcano as Mount St. Helens or Mount Fuji. But some of the world’s most powerful volcanoes – and the second most common – are hidden from sight and can unexpectedly detonate with the force of a nuclear bomb. Maar volcanoes are strange: they are often invisi