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The supervolcano last erupted about 630,000 years ago, according to National Geographic.
If another eruption were to take place, the researchers found that the supervolcano would spare almost nothing. It would shoot 2,500 times more material than Mount St. Helen did in 1980 and could cover most of the U.S. in ash, possibly putting the planet into a volcanic winter. In June, the supervolcano was hit with more than 400 earthquakes in one week, though researchers cautioned it was nothing nothing to be alarmed about.
NASA is working on a way to prevent the supervolcano from destroying mankind, including trying to cool the magma before it spills over.