‘Hydrothermal Explosion’ Forms Boiling Pool at Yellowstone National Park That Could Become a New Geyser

**New Boiling Pool Emerges After Hydrothermal Explosion at Yellowstone National Park**

Yellowstone National Park has witnessed a remarkable geological event following a hydrothermal explosion that occurred on June 13. Officials have reported the formation of a new boiling pool in the Biscuit Basin area, an area that had become active shortly after an unusual change in the local hydrothermal system was detected.

The recent explosion, which occurred near the Black Diamond Pool, led to the emergence of a pool measuring approximately 21 by 17 feet. This new formation began spouting water to heights of up to 30 feet, capturing the attention of park officials and geology experts alike. Concerns were raised regarding the stability of the area, prompting questions about whether the hydrothermal activity in Biscuit Basin had undergone a permanent transformation.

Staff at Yellowstone National Park first noticed signs of unusual activity on the morning of June 13 when the Firehole River was flowing with a “light-grey, milky plume.” This perplexing phenomenon prompted the Yellowstone National Park Geology team to investigate further. They discovered indications of anomalous geological activity, including seismic energy and a low-frequency signal originating from the Black Diamond Pool, the site previously known for eruptive events.

Fortunately, the park was closed to the public during this latest incident, meaning that no visitors were affected by the explosion. The geology team made use of camera footage that had been set up in May 2025, which provided visual documentation of the eruption. Observations recorded at approximately 5:09 a.m. local time revealed a “dark-coloured steam plume” jetting from the ground where the explosion occurred.

Subsequent investigations by the team identified large volumes of hydrothermal water that had collected in the Firehole River due to the explosion. Three newly formed vents served as conduits for the water, which was near or slightly above boiling temperatures. The rapid transition of water into steam is believed to have been the cause of the explosion.

But the developments did not stop there. On June 16, just three days after the initial explosion, the geology team reported the discovery of a vibrant new boiling pool. This new formation was described as vigorously boiling with grey, silty water and was located in the vicinity of the middle vent group. The pool’s lack of surrounding debris suggested it had formed as a result of subsurface collapse, rather than a typical eruption event.

The announcement from the geology team highlighted the dramatic changes in the area, noting that “ground that the team had walked on just two days earlier had developed into an actively boiling pool!” The intensity of steam bubbles forming and collapsing within the pool produced startling thumping sounds, further emphasising the volatility of the environment.

Given the unpredictable nature of hydrothermal activity in Yellowstone, experts are closely monitoring the situation. While the formation of the new boiling pool has intrigued geologists, it remains uncertain whether this change is a temporary event or an indication of a more permanent alteration to the geothermal landscape of Biscuit Basin.

As visitors may eventually return to the park, authorities continue to assess the safety of these hydrothermal features. The ongoing investigations not only seek to understand the current changes but also strive to predict future geological activity within one of the world’s most famous natural wonders. This incident serves as yet another reminder of Yellowstone’s dynamic and often unpredictable geological landscape.