Echinus Geyser in Yellowstone National Park, a rare acidic geyser and the largest in the world, has recently been observed actively erupting again for the first time since 2020.

Echinus is the largest known acidic geyser on Earth.

Yellowstone National Park sits atop one of Earth's most closely watched volcanic systems. The U.S. Geological Survey documented 52 earthquakes in July 2025 alone. All tremors remain classified as ...

Viral videos claim animals are fleeing Yellowstone before an eruption. Experts, park officials, and Snopes say the claims are ...

Add Yahoo as a preferred source to see more of our stories on Google. Yellowstone averages between 1,500 and 2,500 earthquakes per year. In Yellowstone National Park, a bulge the size of 279 football ...

Yellowstone has documented an eruption from its Echinus Geyser, which slowly ceased erupting in the decades leading up to it's last 20217 show.

“Even more colossal” is the way University of Utah researchers now describe the Yellowstone super volcano, which lies under the Wyoming’s northwest corner, after discovering that it is over twice as ...

Viral videos claim animals are fleeing Yellowstone before an eruption. Experts, park officials, and Snopes say the claims are completely false.

Learn how geologists at Yellowstone National Park clean up hot springs filled with litter, saving them from irrevocable damage.

U of U geology professor Robert B. Smith has made a 50-year career out of studying Yellowstone. He presents a lecture on the Yellowstone Supervolcano Wednesday, March 18, at 7:30 p.m. at the Skaggs ...