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

Yellowstone Caldera
A scientist for the U.S. Geological Survey wants to reassure you that Yellowstone ground movement to the south and east and a recent 4.8 magnitude earthquake, the strongest in 30 years,  are “likely unrelated.”

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