Valentine Geyser in the Norris Geyser Basin in Yellowstone National Park unexpectedly sprang to life again with 13 documented ...

The geyser Old Faithful was first documented and named on this day in history, Sept. 18, 1870, by the explorer Nathanial Langford. Langford, who was exploring Yellowstone Park as part of the ...

A surprise eruption that shot steam, water and dark-colored rock and dirt dozens of feet into the sky Tuesday sent people running for safety in Yellowstone National Park. The hydrothermal explosion ...

Valentine Geyser's activity in the day of love remains under wraps because of park regulations.

LANDER - Old Faithful, as it turns out, has been getting a bit sluggish during the dry times. Geologists have known for years that earthquakes can affect geyser activity, but a new study suggests that ...