Echinus Geyser: The World’s Largest Acidic Geyser

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 geysers in the world, with a water pH ranging between 3.3 and 3.6, comparable to vinegar. This distinguishes it from most geysers globally, which are generally alkaline due to dissolved silica. The geyser is located in the Norris Geyser Basin, the hottest and most dynamic geothermal region of Yellowstone. The name “Echinus” is derived from the Greek word Echinos, meaning sea urchin, referring to the spiky mineral formations (geyserite) deposited around the vent.