Oops, it did it again: Another small explosion at Biscuit Basin creates a whole new pool

By: Michael Poland

Outlets: Daily Montanan

Published: July 6, 2026

Words: 958

Last Updated: 2 weeks, 2 days ago

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Just after 5:09 a.m., on Saturday, June 13, monitoring equipment in Biscuit Basin registered anomalous activity, including seismic energy and a low-frequency acoustic signal, called “infrasound,” that was coming from the general direction of Black Diamond Pool, site of a well-observed hydrothermal explosion on July 23, 2024. As the sun rose higher, park staff noticed something odd: The Firehole River from Biscuit Basin downstream to Midway Geyser Basin, a distance of about 6 …

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