QT Yellowstone Caldera (the eruptions of which can be violent enough to send a layer of ash six feet deep as far away as Chicago and which erupts every 600,000 or so years and last erupted 640,000 years ago) update

Earthquake Swarm
Scientists report they are “not sure” of the significance of  a current swarm of earthquakes near the Yellowstone Caldera, but add that it “is not a coincidence” and is “interesting scientifically because there are so many things going on.”

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