Yellowstone National Park Area Closed Indefinitely Following Hydrothermal Explosion

An area within Yellowstone National Park, specifically Biscuit Basin, will remain closed for the remainder of the 2024 season following a significant hydrothermal explosion that occurred on Tuesday morning. The explosion, which took place around 10 a.m., involved a dramatic release of steam and debris, prompting park officials to implement the closure as a precautionary measure due to concerns about potential additional explosions.

Details of the Explosion

The hydrothermal explosion originated from Black Diamond Pool, situated in Biscuit Basin approximately two miles northwest of the renowned Old Faithful geyser. The U.S. Geological Survey (USGS) reported that the explosion was caused by “water suddenly transitioning to steam in the shallow hydrothermal system beneath Black Diamond Pool.” This abrupt conversion of water into steam led to a violent buildup of pressure, resulting in the explosive event.

Eyewitnesses and video footage captured the immediate aftermath of the explosion, illustrating visitors fleeing the area as the blast occurred. Fortunately, the incident resulted in no injuries, and all individuals present at the scene were unharmed.

Impact and Response

The hydrothermal explosion was of significant magnitude, with the geyser’s plume reaching several hundred feet into the sky. Officials reported that debris, including rocks approximately the size of grapefruits, was scattered up to several hundred feet from the explosion site. Additionally, a section of the boardwalk in Biscuit Basin was entirely destroyed by the force of the explosion. Some of the blocks nearest to the explosion were reported to be about three feet (one meter) wide and weighing several hundred pounds, as detailed by the USGS.

In response to the ongoing instability of the hydrothermal system and the potential risk of further small explosions in the coming days or months, Yellowstone National Park has decided to keep Biscuit Basin closed for the remainder of the 2024 season. This decision is intended to safeguard visitors and staff from potential hazards. However, other areas of the park, including the Grand Loop Road and various thermal basins, remain open and accessible to the public.

Context of Hydrothermal Activity

Yellowstone National Park is renowned for its geothermal activity, which includes a variety of hot springs, geysers, and fumaroles. Hydrothermal explosions are a known phenomenon within the park, occurring periodically due to the dynamic and ever-changing nature of its geothermal systems. According to the USGS, while these explosions are relatively common, they typically happen in more remote backcountry areas rather than in high-traffic zones such as Biscuit Basin.

The park’s geothermal systems are subject to continuous monitoring to assess activity levels and mitigate associated risks. Despite the closure of Biscuit Basin, visitors are encouraged to explore other parts of the park and experience its diverse geothermal features, while adhering to established safety guidelines.

As the investigation into the hydrothermal explosion continues, park officials will provide updates regarding any changes in the status of Biscuit Basin and the implementation of safety measures. The ongoing monitoring and assessment of hydrothermal activity remain a top priority to prevent further incidents and ensure the safety and well-being of all park visitors.