The Yellowstone Caldera represents one of Earth's most powerful volcanic systems, having produced three massive supereruptions over the past 2.1 million years. The largest eruption, the Huckleberry Ridge event 2.08 million years ago, ejected approximately 2,450 cubic kilometers of magma and deposited ash across North America from the Pacific Ocean to Iowa and Texas—covering over 3.4 million square kilometers. The most recent supereruption occurred 640,000 years ago, producing the Lava Creek Tuff