Park staff assess the damage to Biscuit Basin boardwalks after hydrothermal explosion. A powerful hydrothermal explosion rocked Yellowstone Nation
A powerful hydrothermal explosion rocked Yellowstone National Park’s Biscuit Basin on Tuesday morning, sending a geyser of steam, rock, and mud high into the air and prompting visitors to flee in panic.
The unexpected eruption occurred around 10:19 a.m. local time near Sapphire Pool, a popular hydrothermal feature located about two miles northwest of the iconic Old Faithful geyser. Eyewitness videos captured the dramatic scene as the ground rumbled and a dark column of debris shot skyward, raining down on the surrounding boardwalk and trails.
Park officials confirmed that no injuries were reported, but the incident caused significant damage to the boardwalk and prompted the immediate closure of the Biscuit Basin area for safety assessments.
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Geologists with the Yellowstone Volcano Observatory are investigating the cause of the explosion, which they believe may have been triggered by a blockage in the underground plumbing system that feeds the park’s geysers and hot springs.
The park is home to the largest concentration of geysers in the world, fueled by a massive underground reservoir of magma. While volcanic activity remains at normal levels, hydrothermal explosions like this one underscore the importance of respecting the park’s natural hazards and following safety guidelines.
Park officials are working to assess the extent of the damage and determine when the Biscuit Basin area can be safely reopened to the public. Updates will be provided on the park’s website and social media channels.
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