Molten lava more than 1,000 degrees oozing from an eruption might be less of a concern than the ash. The eruption would likely cover the ground with as much as 4 inches of gray ash, which could be detrimental to the crops growing in the Midwest.

Along with the ash, the supervolcano would spew a whole bunch of gasses, including sulfur dioxide, a gas that can lead to acid rain as well as global cooling as it reflects the sun away from the Earth.