I am posting a little early for SkyWatch Friday. We are taking a vacation and are on a month long road trip touring several National Parks in the U. S. Two days ago we took these photos of Old Faithful, located in Yellowstone National Park, Wyoming.
According to Wikipedia, Old Faithful was named in 1870 during the Washburn-Langford-Doane Expedition and was the first geyser in the park to be named. You can read more here.
This is the most famous geyser in the world and is probably the most popular as it erupts with great regularity, every 60 minutes and up to two hours. Old Faithful is not the tallest in the park but is the most popular because of its highest frequency. It can shoot anywhere from 3,700 to 8,400 gallons of boiling water. The average height of an eruptions has been recorded at 145 feet, while the highest recorded eruption was 185 feet. Intervals between eruptions averaged 66 minutes in 1939. Today that average has increased to 90 minutes, due to a 7.3 earthquake in 1959.
Since Old Faithful was discovered, nearly 140,000 eruptions have been officially recorded. During an eruption, the water temperature at the vent has been measured at 204 degrees F. (95.6 degrees C). The steam temperature has been measured above 350 degrees F.
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Happy SkyWatch Friday!