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
Yellowstone earthquake counts for the past three months, as of May 1, have gone from
73 to 56 to 62.
The trend is apparent.

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