There appears to be a massive bulge forming along Yellowstone's caldera, indicating activity within the supervolcano's magma chamber.

Yellowstone National Park sits atop one of Earth’s largest volcanic systems, and right now that system is slowly reshaping the ground. Instruments show that the Yellowstone caldera is inflating into a ...

S trange things are afoot in Yellowstone National Park.

The bulge first appeared in 1996 and has now returned, but Yellowstone Volcano Observatory says there's no cause for alarm.

Yellowstone National Park is a place of wonder and beauty that never ceases to amaze the millions who visit each year.

While the chance for an eruption is extremely low, the supervolcano is still likely to blame. A 2025 study from the United States Geological Survey determined that Yellowstone’s magma chamber ...

Valentine Geyser in the Norris Geyser Basin in Yellowstone National Park unexpectedly sprang to life again with 13 documented ...

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 ...

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 ...

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 ...