Yellowstone National Park geologists have confirmed that a small hydrothermal explosion that occurred earlier this month formed a new thermal pool.

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,” ...

According to the Yellowstone Volcano Observatory, hydrothermal explosions are “violent and dramatic events resulting in the rapid ejection of boiling water, steam, mud, and rock fragments.” These ...