Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Michael Poland, geophysicist with the ...

The same geyser that erupted last summer in a hydrothermal explosion in Yellowstone National Park was recorded erupting again, video shows. “Small eruption from Black Diamond Pool, site of a ...

A clogged-up underground system caused the powerful hydrothermal explosion at Yellowstone's Black Diamond Pool last summer, according to the U.S. Geological Survey (USGS). Minerals had sealed off ...

A newly-installed webcam captured a hydrothermal eruption at Yellowstone National Park, less than a year after a sizeable explosion destroyed the same area. The webcam captured a small eruption at ...

On May 31, 2025, a webcam in Yellowstone National Park detected a small explosion in the Biscuit Basin Area—the same zone that suffered an unexpectedly destructive hydrothermal eruption less than a ...

A muddy eruption at Black Diamond Pool in Yellowstone National Park has been captured on camera. The video was recorded by the Yellowstone Volcano Observatory webcam Saturday morning. They said the ...

The dominant rock type in the Yellowstone region is rhyolite, and that is very rich in silica. As hot water circulates underground, it can dissolve that silica and bring it to the surface, where it is ...