Old Faithful Geyser at Yellowstone National Park
In Wyoming, United States
Size:  (not chosen)
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Old Faithful Geyser is the most predictable geyser in Yellowstone National Park.
The Old Faithful Geyser, located in Yellowstone National Park, is perhaps the world's most famous geyser. Old Faithful was named in 1870 by the Washburn Party and was the first geyser in the park to receive a name. An eruption can shoot 3,700-8,400 gallons (14,000-32,000 l) of boiling water to a height of 106-184 feet (30-55 m) lasting from 1.5-5 minutes. 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. With an error of 10 minutes, Old Faithful will erupt 65 minutes after an eruption lasting less than 2.5 minutes or 92 minutes after an eruption lasting more than 2.5 minutes.
To claim this cache, (1) Please attach a picture of the Old Faithful Geyser area from the cords with or without you in it when you log the find. (2) Email the owner the answer to the following question:
Old Faithful is not the tallest geyser in Yellowstone Park. Which geyser is the tallest, active geyser in Yellowstone Park?
Please send the answer when you log the cache so we get them in close to the same time. We do check that everybody sends us the answer. Logging this cache without sending us the answer will result in your log entry being deleted.
DO NOT post the answer to the question in your log, not even encrypted. Your log will be deleted if you do.
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Last Updated: on 4/23/2017 9:59:27 AM Pacific Daylight Time (4:59 PM GMT)
Coordinates are in the WGS84 datum