Tucked inside Norris Geyser Basin, the hottest and most geologically restless thermal area in all of Yellowstone National Park, Echinus Geyser has been quiet for years. But in early February 2026, ...

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.

The U.S. Geological Survey has spent years pushing back against a persistent myth: that Yellowstone’s supervolcano is “overdue” for a catastrophic eruption capable of wiping out life across the ...

Yellowstone’s Echinus Geyser awakens after years of dormancy, offering rare eruptions and unforgettable experiences for ...

The largest acidic geyser in the world, Echinus Geyser, is active again, with eruptions occurring every 2 to 5 hours, ...

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

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 ...

Echinus is the largest known acidic geyser on Earth.