supposedly there is one under yellowstone national park and it may be getting close to urrupt. the land there has rose 29 inches since the 1920's. and that the ground is bulging in areas, some spots as big as 2 football fields. the guy talking about it said that if it exploded, lava would be thrown an estimated 30 miles in the air. which would mean it would turn to rock and come crashing down on the earth. volcanic ash would cover the entire earth in the sky. ash would cover all of the us and in some spots up to a few feet. everyone withing a 600 mile radius of the explosion would die instantly.
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