“Yellowstone earthquake: Biggest in 34 years, but not the ‘big one’”
http://www.csmonitor.com/Science/2014/0331/Yellowstone-earthquake-Biggest-in-34-years-but-not-the-big-one
(If it had been the big one, you wouldn’t be reading this, because your power would be out and you would have ash falling on your house.)
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