Yellowstone National Park’s Biscuit Basin experienced a localized hydrothermal explosion on Tuesday, July 23rd, 2024, around 10:00 am. Thankfully, there were no reported injuries, but the blast caused damage to park boardwalks and necessitated the closure of the area for safety reasons.

The Power of Superheated Water

The United States Geological Survey (USGS), working alongside Yellowstone National Park (YNP) officials, confirmed the event. Hydrothermal explosions occur when superheated underground water rapidly boils and transforms into steam, causing a forceful eruption. These events are not uncommon in Yellowstone, and the USGS cited past examples like the 1989 explosion at Porkchop Geyser and a smaller event in April 2024 at Norris Geyser Basin. Interestingly, Biscuit Basin itself witnessed a similar explosion back in May 2009.

Investigation and Reassurance

Park geologists are currently investigating the cause of the explosion, which appears to have originated near Black Diamond Pool. While the extent of the damage remains under assessment, park rangers have closed Biscuit Basin entirely, including the parking lot and boardwalks, until further notice. The good news is that the Grand Loop Road remains open for travel.

Both YNP and USGS emphasize that this explosion doesn’t indicate any heightened volcanic activity. Monitoring data shows Yellowstone’s volcanic system remains at normal levels. Hydrothermal explosions are not precursors to eruptions, and they’re not triggered by rising magma.

For further information on hydrothermal explosions at Yellowstone National Park, please refer to the USGS website: USGS Hydrothermal Explosions.

Photos of the scene released by the National Park Service:

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