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

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

Echinus is the largest known acidic geyser on Earth.

Whether this activity will persist through the summer months, allowing tourists to observe, remains uncertain.

The eruptions began in early February. It’s unknown whether the eruptions will continue into the busy summer tourism season, ...

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

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

The world’s largest acidic geyser has erupted in Yellowstone National Park after remaining largely dormant since 2017. The ...

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

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

The Echinus Geyser had been silent for the last six years, and it is unknown whether the eruptions will continue into the summer.

The geyser really came alive in fall 2017. From October 18 to November 10, 2017, Echinus consistently erupted roughly about ...