A sleeping supervolcano shook up Yellowstone National Park early this morning at 6:34 a.m. and registered a 4.8 magnitude earthquake, but geologists say the shake up should be of no concern. The tremor rattled the border between Wyoming and Nevada, nearly in the center of the historic park, near the Norris Geyser Basin. The last earthquake of this magnitude occurred thirty years ago in 1985.
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