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Here at the Yellowstone Volcano Observatory we receive a lot of questions related to Yellowstone supereruption "what ifs" and "whens," even though that is the least possible scenario for future volcanic activity. News articles, websites, and videos often exaggerate the rarest events, while ignoring hazards that may actually happen during a person's life. So right here, right now, we're going to flip this around and discuss Yellowstone's geologic hazard scenarios in order from most to least likely.

This graphic represents the frequency of hazardous events that can occur at Yellowstone.

Excelsior Geyser erupted in a series of violent hydrothermal explosions in the 1880s and early 1890s. The image is a colorized photograph from…

An aerial view shows the West Yellowstone lava flow at Firehole Canyon, which erupted 114,000 years ago. The flow here is about 1,150 feet thick.