The world's largest acidic geyser has begun erupting again in Yellowstone after slumbering for over five years, the national ...
Learn more about the Echinus Geyser at Yellowstone Park, which recently erupted, but may not sustain into the summer.
Echinus is the largest known acidic geyser on Earth.
Yellowstone’s restless ground is on the move again. Since July 2025, instruments on the park’s north rim have recorded roughly an inch of uplift, a subtle rise that mirrors the pattern that preceded ...