And don’t forget the Yellowstone formation. Last week I heard an announcement that the supervolcano under the park could blow sometime in this century. If that happens, kiss everything west of the Mississippi River goodbye.
“At Yellowstone," he continued, "activity is clearly episodic. There was a very long period of volcanic activity between 170,000 years ago until about 70,000 years ago. Many tens of lava flows erupted during that time, though none were nearly as explosive as the supereruptions that are so oft-discussed in the press. Since 70,000 years ago, there have been no volcanic eruptions at Yellowstone. Nearly all geologists I know expect that Yellowstone will experience future volcanic eruptions, but we honestly cannot state when they will occur, nor do we know if there are any more supereruptions in Yellowstone's future.”
Live Science.