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.

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

While the chance for an eruption is extremely low, the supervolcano is still likely to blame. A 2025 study from the United ...

Geologists discovered a new blue water spring at Yellowstone National Park that likely formed after a series of "mildly explosive events," the United States Geological Survey said. The hole is about ...

Yellowstone National Park sits atop one of the most studied volcanic systems on Earth, and the question of what a full-scale ...

Nearly 5 million travelers come to Wyoming to visit Yellowstone National Park each year, most in the summer months. They come for the geysers, wildlife, scenery and recreational activities such as ...

The same geyser that erupted last summer in a hydrothermal explosion along a Yellowstone National Park boardwalk was caught erupting on video again thanks to a newly-installed webcam to track the ...