Isn’t Yellowstone right up there on the Wyoming-Idaho border? I don’t mean to be a conspiracy theorist, but there sure have been a lot of events lately that, when tied together, form a fairly strong cluster of datapoints around that area. It might be nothing more than the human tendency to infer a pattern where none exists, but on the other hand, no one has ever actually seen a volcano like that build up to an eruption, so do we really know what we should be seeing?
Earthquake swarms do precede volcanic eruptions, certainly. Take note that other volcanoes in other states have also been subject to lots of quakes recently.
As for the nature of what can come out of Yellowstone, no real info on that right now. Size of caldera is not a general indication of size of vent, after all. Not to mention that there are many other volcanic features in Idaho that can reactivate without warning.
Edgar Cayce mentioned, as an aside to his being reborn in about 2100 AD in Nebraska, that at the time, Nebraska would be the west coast of America.
It’s also right next to the Bakken fracking area, when measured in Eco Miles. It’s the fracking.