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LiveScience
LiveScience
Sascha Pare

'Spectacular and definitely hazardous': Yellowstone geyser erupts, firing steam and debris over nearby tourists

Yellowstone National Park staff examine the damage caused by a geyser eruption in Biscuit Basin. We see a broken boardwalk and damaged guardrails.

A surprise hydrothermal eruption at Yellowstone National Park coughed up huge clouds of steam and dust on Tuesday (July 23), according to the National Park Service (NPS), prompting visitors to flee and staff to close the area.

Videos posted online show dozens of people along a boardwalk running away from a 100-foot-tall (30 meters) plume of debris in Yellowstone's Biscuit Basin, located just north of the Old Faithful geyser. Biscuit Basin is known for its collection of colorful geysers and thermal pools, including Sapphire Pool, which is close to the eruption site.

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