YELLOWSTONE NATIONAL PARK, Wyoming — After a major explosion at the Biscuit Basin in Yellowstone National Park, scientists are reporting further activity two years later, including another small blast in June.
In 2024, Black Diamond Pool in Biscuit Basin erupted and sent mud and debris high into the air. No visitors were hurt, but part of the boardwalk was destroyed.
After that, researchers set up equipment to keep watching the area. In June 2026, that monitoring caught another explosion a few hundred feet beyond Black Diamond Pool, according to the U.S. Geological Survey.
The USGS reported the June explosion was much smaller, but it still threw rock, mud and boiling water. It also created new cracks and a new pool filled with boiling water.
The basin has remained closed since the 2024 explosion and remains closed for the foreseeable future.
"It's for the Park Service scientists and employees and the [Yellowstone Volcano Observatory] scientists. They need to go out there and access the area to install monitoring equipment. So, those are the only folks you'll see out there these days," Greg Vaughan of the USGS Yellowstone Volcano Observatory said.
Video from cameras installed by the USGS showed more activity in the newly formed pool. In the background, viewers can see boiling water was spouting from the area.
The USGS also said earthquake activity in the park stayed at regular background levels despite the geothermal events.