Tourists and officials were startled by a hydrothermal explosion at Black Diamond Pool in July 2024. Geoscientists are working out how and why it occurred to better understand these hazardous events.

This frame capture of a video from a webcam shows a small eruption emanating from Black Diamond Pool in Biscuit Basin, a subbasin of Upper Geyser Basin in Yellowstone National Park, on May 31, 2025.

On May 31, at 8:39 p.m., a newly installed camera at Yellowstone National Park captured a small hydrothermal eruption. This explosion took place at Black Diamond Pool in Yellowstone's Biscuit Basin.

On Saturday night, an eruption from the Black Diamond Pool in Yellowstone National Park shot up about 20 feet, according to the Yellowstone Volcano Observatory. On May 14, scientists had ...

This frame capture of a video from a webcam shows a small eruption emanating from Black Diamond Pool in Biscuit Basin, a subbasin of Upper Geyser Basin in Yellowstone National Park on May 31.

Especially in the Black Diamond Pool area where hydrothermal explosions have been active for most of the 2000s. Although, Poland describes last year's explosion as an unusual event.

On July 23, 2024, steam exploded from the ground beneath Black Diamond Pool in the area, destroying a park boardwalk and launching water, mud, rocks, and other debris up to 600 feet into the air.

This frame capture of a video from a webcam shows a small eruption emanating from Black Diamond Pool in Biscuit Basin, a subbasin of Upper Geyser Basin in Yellowstone National Park, on May 31, 2025.