Black Diamond Pool in Yellowstone National Park has been active since its massive hydrothermal explosion in July 2024. It’s also “decidedly unpredictable,” erupting twice in two days last week, ...

BOZEMAN — A hydrothermal explosion was caught on video at Yellowstone National Park on Monday, December 22, 2025, marking the second major event at the same location in recent months. The Yellowstone ...

That’s the word U.S. Geological Survey volcanic experts used to describe a muddy eruption at Black Diamond Pool in Yellowstone National Park on Saturday morning. Video shared by the USGS on social ...