Photographer's Note

This is unquestionably the most famous geyser on earth. Old faithful in Yellowstone National Park. Geysers are hot springs with narrow spaces in their plumbing, usually near the surface. These constrictions prevent water from circulating to the surface freely.The deepest circulating water can exceed the surface boiling point.
As the water rises, steam forms. Bubbling upward, steam expands as it nears the surface until the bubbles are too large and numerous to pass through the constrictions. At a critical point, the confined bubbles actually lift the water above, causing the geyser to splash or overflow. This decreases pressure on the system, and the violent boiling results. Tremendous amounts of steam force water out of the vent, and the eruption occurs.
Old Faithful's eruption duration, height, and the interval between eruptions varies daily and yearly. As of January 2011, an eruption lasts 1.5 - 5 minutes. Old Faithful's height ranges from 106 feet to more than 180 feet, averaging 130 feet. Between 3,700 and 8,400 gallons of water are expelled per eruption. Just prior to eruption, water temperature at the vent is 95.6C. It is a fabulous sight to see!

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Photo Information
  • Copyright: michael shalter (retlash) Gold Star Critiquer/Gold Note Writer [C: 68 W: 3 N: 168] (847)
  • Genre: Places
  • Medium: Color
  • Date Taken: 2011-07-25
  • Categories: Nature
  • Camera: canon 230 HS
  • Exposure: f/4, 1/1600 seconds
  • More Photo Info: view
  • Photo Version: Original Version
  • Date Submitted: 2011-08-28 13:52
Viewed: 1176
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Additional Photos by michael shalter (retlash) Gold Star Critiquer/Gold Note Writer [C: 68 W: 3 N: 168] (847)
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