Yellowstone National Park Webcams

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Old Faithful Webcam Capture of the Day.

Photo captured by: Christiane Moughan, New York 2021-11-19

Image 4 of 153

Christiane Moughan, New York 2021-11-19

Predicting Old Faithful: The time to the next eruption, the interval, is predicted using the duration of the current eruption. The duration is timed from the first heavy surge which lifts water skyward at the start of the eruption until the last small splash above the cone at the very end. The longer the eruption lasts, the longer the interval until the next eruption. For instance, a 2 minute eruption results in an interval of about 55 minutes whereas a 4.5 minute eruption results in an interval of about 90 minutes.

It is not possible to predict more than one eruption in advance.

Duration 15min 2min 25min 3min 35min 4min 45min 5min
Interval50 min57 min65 min71 min76 min82 min89 min95 min

PREVIOUS ERUPTIONS OF OLD FAITHFUL GEYSER 2001-2020

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