“The 3 great Yellowstone eruptions cover a 2 million year period, but there is a string of other calderas stretching westward and covering around 16 million years, so I doubt meteors had anything to do with that ongoing phenomena.”
Actually I read a book (by John McPhee I think) which suggested the original Yellowstone hot spot was caused by an impacter some 16 mya.
A meteor might have punched into the original magma chamber, but then what has caused the continued episodes. I hope you looked at the map. I just read the article and found several errors. The mentioned the 640 kya eruption, but not the two previous ones going back to 2 my. Then they say it will be another 500 ky before the next one while most believe there is a good likelihood of one in the next 100 ky. They also try to make it really safe by saying it won’t be for 1/2 million years, but elsewhere I have read that since the last big one there have been about 70 small ones, so it could be building up to one of those.