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

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

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

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

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

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

The world's largest acidic geyser has erupted for the first time in years at Yellowstone National Park. The Echinus Geyser, which consistently put on a show in the last half of the 20th Century, last ...

A long-dormant Yellowstone geyser – the largest acidic geyser in the world – recently started erupting again. (MA Bellingham via USGS) ...

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

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

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

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