Yellowstone National Park is quietly lifting. Along the north rim of the Yellowstone Caldera, just south of Norris Geyser Basin, the ground has swelled into a broad dome roughly the size of Chicago, ...

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

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 ...

S trange things are afoot in Yellowstone National Park.

The bulge the size of Chicago has sparked fears it could erupt - but one scientist insists there are no major concerns yet, ...