An eruption of a supervolcano in Yellowstone National Park would leave no place to escape to, as it would deposit ash as far afield as Los Angeles, New York and Miami, a study has revealed.
A volcanic eruption is considered to be a supereruption if it ejects in excess of 240 cubic miles of eruption material into the atmosphere.
The Yellowstone region, with a giant pool of hot, partly melted rock beneath, has experienced three such eruptions in the past, at around 2.1 and 3.1 million years ago, and again around 640,000 years ago.
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