Yellowstone’s Largest Acidic Geyser Erupts Again After Years of Dormancy

By News Blend 360

Yellowstone National Park is once again displaying its powerful geothermal activity as the world’s largest acidic geyser has resumed erupting after several years of dormancy.

According to the U.S. Geological Survey, Echinus Geyser has begun erupting again following a period of inactivity that lasted nearly four years.

Located inside the dynamic thermal system of Yellowstone National Park, the 66-foot geyser pool sits in one of the hottest and most geologically active areas of the park. The geyser had been largely dormant since 2020 before scientists began detecting renewed activity earlier this year.

Monitoring data from the USGS indicates that repeated surges began in early February, signaling that the geothermal system beneath the geyser was becoming active again.

The first confirmed eruption occurred on February 7, marking the first time the geyser had erupted since 2020. Additional eruptions followed shortly afterward on February 9, February 12, and February 15, according to researchers tracking Yellowstone’s geothermal features.

Some of the eruptions lasted several minutes and shot columns of acidic hot water and steam as high as 30 feet into the air, a dramatic reminder of the intense volcanic forces operating beneath the park.

Echinus Geyser is known for its extremely acidic water chemistry, which sets it apart from many of Yellowstone’s other geysers. The acidity can change the surrounding mineral deposits and microbial life, making the site a valuable location for scientific research.

Scientists say that fluctuations in Yellowstone’s geysers are normal and often occur in cycles, with some geysers remaining dormant for years before suddenly becoming active again.

For visitors and scientists alike, the renewed activity serves as a reminder of the constantly evolving geothermal landscape beneath Yellowstone — one of the most active volcanic systems in the world.