In the early morning hours of June 13, 2026, a small hydrothermal explosion occurred at Biscuit Basin in Yellowstone National Park! The activity was recorded by a camera and other monitoring equipment and resulted in major changes to the landscape. Today’s Caldera Chronicles blows open the story!Roughly two years ago, a more powerful explosion occurred in nearly the same spot:
https://usgs.gov/observatories/yvo/news/oops-it-did-it-again-another-small-hydrothermal-explosion-biscuit-basin
▶️Explosion took place at 5:09 a.m. MDT on June 13, 2026
▶️The event was captured by a remote camera, as well as seismic and infrasound monitoring instruments installed nearby
▶️The location was the barren area just north of Black Diamond Pool (that pool was the site of a larger hydrothermal explosion on July 23, 2024)
▶️Three new vent areas opened, including an 18.5-meter (61-foot) fissure filled with boiling water
▶️Rocks were thrown a few meters (yards), indicating the explosive energy was much lower than that of the 2024 event
▶️High levels of water discharge from the vents entrained sediment and drained into the Firehole River, creating milky streaks in the river that persisted far downstream
▶️About 2 or 3 days later, a circular collapse featured formed in the area of the explosion and filled with near-boiling water
▶️On June 18, geyser-like spouting about 6-9 meters (20-30 feet) high was observed from the new circular pool
▶️Yellowstone Volcano Observatory scientists deployed new monitoring equipment in the basin last week to track the evolving nature of the activity
Biscuit Basin remains closed to visitors.
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Check out our online trail guides:
- Glacier National Park: HikinginGlacier.com
- Grand Teton National Park: TetonHikingTrails.com
- Rocky Mountain National Park: RockyMountainHikingTrails.com
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