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How often does Old Faithful erupt?

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How often does Old Faithful erupt?
Old Faithful erupts every 35 to 120 minutes for 1 1/2 to 5 minutes. Its maximum height ranges from 90 to 184 feet. It is not the biggest or the most regular geyser in Yellowstone but it is the biggest regular geyser.
Reference:
Old Faithful Geyser - Yellowstone National Park
Jul 4, 2019
Old Faithful erupts every 35 to 120 minutes for 1 1/2 to 5 minutes. Its maximum height ranges from 90 to 184 feet. It is not the biggest or the most regular geyser in Yellowstone but it is the biggest regular geyser.
Reference:
Old Faithful Geyser - Yellowstone National Park
Jul 4, 2019