The 7,300 Foot Wide Yellowstone Explosion Crater; Mary’s Bay Crater

Looking around Yellowstone there are a group of several thousand foot wide explosion craters. Many of these craters have formed in the last 10,000 years, representing an often underreported future hazard within the National Park. The largest of these craters measures more than 7,300 feet across, and formed in a steam explosion equivalent in energy to a blast of several hundred kilotons of TNT. What I am referring to is Mary’s Bay Crater, which is located at depth in Yellowstone Lake. If you would like to support this channel, consider becoming a patron at Another way to support this channel is to make an order via our gemstone and geology related etsy store at . This channel’s merch store is also on etsy at . Graphics of eruption dates are courtesy of the Global Volcanism Program, Smithsonian Institute. Google Earth imagery used in this video: ©Google