The World's Largest Acidic Geyser In Yellowstone Reawakens, Erupts 60 Times

Echinus Geyser, the world’s largest acidic geyser, suddenly burst back to life in Yellowstone last month after being dormant for five years. Once called a "star performer,"it' since erupted 60 times in 18 days, sending acidic water 80 feet into the air.

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https://cowboystatedaily.com/2026/03/07/the-worlds-largest-acidic-geyser-reawakens-in-yellowstone/

The World's Largest Acidic Geyser In Yellowstone Reawakens, Erupts 60 Times

Echinus Geyser, the world’s largest acidic geyser, suddenly burst back to life in Yellowstone last month after being dormant for five years. Once called a…

Cowboy State Daily
Echinus Geyser is back in action! For now…

The world’s largest acidic geyser is located in Norris Geyser Basin. Lately, it’s been putting on quite a show.

USGS