The Washburn Expedition in 1870 named Old Faithful for its nearly regular schedule of eruptions. It is the grand old geyser of Yellowstone National Park, Wyoming, because of its frequent and predictable eruptions. The intervals between eruptions average between 45-90 minutes and the average duration is about four minutes. To predict the next eruption, its first continuous surge is timed until the final splash.
Add to Cart Add to Lightbox Download