An enormous supervolcano may be hiding under Alaskan islands

A mysterious, previously undiscovered supervolcano may be lurking beneath Alaska’s Aleutian Islands. A new study suggests a wide crater, created when the supervolcano exploded, connects at least four existing volcanoes. It’s so big that if the supervolcano erupted during the last few thousand years, it could have disrupted civilizations around the world, says John Power, a geophysicist at the U.S. Geological Survey’s Alaska Volcano Observatory. Power presents the findings at the annual meeting of the American Geophysical Union on December 7.

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