A hydrothermal explosion occurred at Biscuit Basin in Yellowstone National Park, causing damage to a boardwalk but resulting in no injuries. The explosion was captured on video and caused park guests to run to safety. Hydrothermal explosions are caused by hot water flashing into steam in a confined space and are one of the least understood geologic hazards. Yellowstone is a hotbed for these explosions, with several occurring annually. While no one has been killed or injured by a hydrothermal explosion, they can produce significant damage, such as a crater the size of a football field. Scientists are working to better understand and potentially predict these events, although this remains a challenge. Overall, while hydrothermal explosions are a significant geologic hazard in places like Yellowstone, they are not directly linked to volcanic eruptions and do not indicate impending volcanic activity.
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