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


The
Yellowstone monthly earthquake counts in the past year have gone from 97 to 200 to 123 to 76 to 153 to 102 to 57 to 68 to 126 to 121 to 84 to 81.
The trend is apparent.

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