“The last time the caldera in Yellowstone blew, the entire North American continent was under about a foot of ash. People who’ve gone diving in Yellowstone Lake say that there is a bulge in the floor that is now about 100 feet high and the whole thing is just sort of pulsing. From different people you get different answers, but it could go in another three to four thousand years or it could go on Thursday. No one knows.”
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Despite my interest in geology, I hadn’t realized until our visit to Yellowstone what an ACTIVE site it is. And although theoretically I knew Yellowstone could erupt at any time, the potential size of the eruption is hard to grasp without driving around the park for a few days.