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Jun 23, 2026

Another hydrothermal explosion has occurred at Yellowstone National Park

Another hydrothermal explosion has occurred at Yellowstone National Park

The boiling water measured at 200 degrees Fahrenheit at some points

ByJulia JacoboJune 23, 2026, 4:30 PM

    Another hydrothermal explosion has occurred at Yellowstone National Park, highlighting the unstable nature of the reserve's extensive volcanic network, the U.S. Geological Survey says.

    On June 13, a small hydrothermal explosion occurred at Yellowstone's Biscuit Basin -- a popular thermal area located less than 2 miles northwest of Old Faithful, according to the USGS.

    The explosion occurred at 5:09 a.m. local time and did not cause any injuries, according to the USGS. A new pool formed as a result of activity.

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    Monitoring equipment at Biscuit Basin registered anomalous activity, including seismic activity and infrasound -- a low-signal acoustic signal -- coming from the direction of the Black Diamond Pool, where a hydrothermal explosion occurred on July 23, 2024.

    PHOTO: Looking south, toward Black Diamond Pool (steaming blue area in the left middle ground) along a fissure that formed during a small hydrothermal explosion on June 13, 2026, in Biscuit Basin, Yellowstone National Park.
    Looking south, toward Black Diamond Pool (steaming blue area in the left middle ground) along a fissure that formed during a small hydrothermal explosion on June 13, 2026, in Biscuit Basin, Yellowstone National Park. The fissure is about 18.5 meters (61 feet) long and filled with near-boiling water.USGS

    When park rangers went to investigate, they noticed that water in the Firehole River flowing downstream from Biscuit Basin included a light-gray to milky runoff, an "odd" observation, according to the USGS.

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