Hydrothermal Explosion at Yellowstone Sends Plume of Steam and Mud Into the Air

The explosions are typically the result of water flashing into steam underground: USGS.

The boardwalk near the Sapphire Pool in Yellowstone National Park after an explosion on July 23, 2024. National Park Service

A geyser at Yellowstone National Park underwent a violent explosion on July 23, sending mud and debris into the air.

“On Tuesday, July 23, at about 10:19 a.m., a localized hydrothermal explosion occurred near Sapphire Pool in Biscuit Basin, located just north of Old Faithful,” the National Park Service said in a statement.