People visit Yellowstone National Park every year to observe its wildlife and vast array of hydrothermal features. One ...

One question that lurks in the back of many visitors’ minds as they traverse through one of the world’s largest active volcanoes is: when is Yellowstone’s next eruption going to be?

Based on our knowledge of Yellowstone’s eruptive history, the annual probability of a volcanic eruption is on the order of ...

Yellowstone’s Upper Geyser Basin holds one of the tallest predictable geysers, Grand Geyser, erupting up to 200 feet. Grand ...