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Echinus Geyser: The World’s Largest Acidic Geyser

16 March 2026

Echinus Geyser: The World’s Largest Acidic Geyser

Recent scientific observations have reported renewed eruptive activity at Echinus Geyser, located in the Norris Geyser Basin of Yellowstone National Park, United States, after nearly six years of dormancy. The reactivation of this geyser has attracted attention from geologists and environmental scientists because of its unusual acidic nature and its connection with the geothermal dynamics of the Yellowstone supervolcano.

Echinus Geyser is considered one of the largest acidic ge

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