> is that when the big one hits the earth
We'll be long gone. Even NASA figured out pretty quick Yellowstone going boom is a far bigger threat than another dinosaur killer. Last time it blew covered the whole continent in a foot of ash (sure won't be pleasant on other side of pond either what with the nuclear type winter). Mt. Ranier flipping its lid and Cascadia fault rupturing in our lifetimes will simply be the warmup act.