Echinus Geyser in Yellowstone National Park, a rare acidic geyser and the largest in the world, has recently been observed actively erupting again for the first time since 2020.

Whether this activity will persist through the summer months, allowing tourists to observe, remains uncertain.

The largest acidic geyser in the world, Echinus Geyser, is active again, with eruptions occurring every 2 to 5 hours, according to the USGS.

Learn more about the Echinus Geyser at Yellowstone Park, which recently erupted, but may not sustain into the summer.

Yellowstone’s Echinus Geyser awakens after years of dormancy, offering rare eruptions and unforgettable experiences for ...

Echinus is the largest known acidic geyser on Earth.

Yellowstone has documented an eruption from its Echinus Geyser, which slowly ceased erupting in the decades leading up to ...

The Echinus Geyser had been silent for the last six years, and it is unknown whether the eruptions will continue into the summer.

Steamboat Geyser, which shoots water 300 feet skyward—higher than from any geyser on earth—oftentimes steals the show at Norris Basin in Yellowstone National Park. But a few hundred feet away is ...

The geyser really came alive in fall 2017. From October 18 to November 10, 2017, Echinus consistently erupted roughly about every two to three hours. The activity then stopped with only one eruption ...

Echinus Geyser in Yellowstone National Park’s Norris Geyser Basin is erupting again for the first time since 2020, after renewed activity began in early Februar ...