Old Faithful, Yellowstone

From GlobalMotion

Old Faithful is a cone geyser located in Yellowstone National Park, Wyoming, United States. Old Faithful was named in 1870 during the Washburn-Langford-Doane Expedition and was the first geyser in the park to receive a name.

An eruption can shoot 3,700-8,400 gallons of boiling water to a height of 106-184 feet lasting from 1.5ndash;5 minutes. The average height of an eruption is 145 feet (44 m). The intervals range from 65-92 minutes with 91 minutes being the average. More than 137,000 eruptions have been recorded. Harry M. Woodward first described a mathematical relationship between the duration and intervals of the eruptions (1938). Old Faithful is not the tallest or largest geyser in the park. That title belongs to the less predictable Steamboat Geyser.