Echinus Geyser back in action now
Summary
Echinus Geyser, the world's largest acidic geyser, has returned to activity in Norris Geyser Basin after a dormancy period. Temperature monitoring shows eruptions resumed in February 2026, with eruptions roughly every 2–5 hours lasting 2–3 minutes and reaching 6–10 meters, echoing patterns seen in 2017. The piece underscores how hydrothermal chemistry and real-time data help scientists track geyser behavior and communicate updates to visitors.