Learn more about the Echinus Geyser at Yellowstone Park, which recently erupted, but may not sustain into the summer.

Yellowstone's Largest Acidic Geyser Wakes Up After Six Years, Blasting Water 30 Feet High ...

The largest acidic geyser in the world is erupting again at Yellowstone National Park after several years of dormancy, ...

Echinus Geyser in Yellowstone National Park, a rare acidic geyser and the largest in the world, has recently been observed ...

The geyser really came alive in fall 2017. From October 18 to November 10, 2017, Echinus consistently erupted roughly about every two to three hours. The activity then stopped with only one eruption ...

The geyser is likely to fall back into dormancy soon, but there's a slim chance the spectacular eruptions will continue into ...

Largest acidic geyser in the world has started erupting continuously after five years.

In early February 2026, repeated surges of the geyser began—as before, with the surface becoming agitated and releasing more ...

The world's largest acidic geyser has begun erupting again in Yellowstone after slumbering for over five years, the national ...

The Echinus Geyser at Yellowstone National Park, which is the biggest acidic geyser on the planet, has been “wowing” visitors ...

Echinus is the largest known acidic geyser on Earth.