Acidic Echinus Geyser Briefly Roars Back to Life at Yellowstone

Yellowstone’s Norris Geyser Basin has seen the acidic Echinus Geyser erupt again since February, with bursts every 2–5 hours reaching 20–30 feet—the first sustained activity since 2017. Experts note the eruptions may last only a month or two before dormancy returns, and it’s uncertain whether they’ll continue into summer due to the geyser’s rare chemistry that allows acidic waters to coexist with a relatively intact plumbing system.