Old Faithful Webcam

Live image of Old Faithful, Yellowstone National Parks most famous geyser. Old Faithful erupts every 35 to 120 minutes for 1 1/2 to 5 minutes.

As the predicted time for the next eruption approaches, the benches will begin to fill. By looking at the crowd, you can get a rough idea as to when the next eruption is predicted. If you see people walking toward the camera then you just missed the eruption.

Prediction times are shown below the image during hours the Visitor Center is open.

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.

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