And despite what you sometimes hear in the press, there's no indication that we're due for another "super-eruption" anytime soon. In fact, it's even possible that Yellowstone might never have an eruption that large again. read more
Yes a large meteorite could, but I doubt that we would notice the eruption much. It would take a real dino-killer of a meteorite, probably tens of kilometers in diameter hitting spot onto the magma chamber, blasting off the roof and splashing out the magma. read more