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Predicting Geysers


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  • This isolated spring is one of the most regular geysers in Yellowstone. Its 75 foot (23 m) eruption lasts about half an hour and is followed by an interval between 5.5 to 7 hours. Eruptions usually occur half an hour before or after the current average interval.

    Riverside Geyser ejects water from its vent out over the Firehole River

    Approximately 1.5 to 2 hours before a Riverside eruption, water begins to overflow from the geyser’s main lower vent into the river. About an hour later, water will begin to churn out of the geyser’s smaller upper vent and the activity continues to escalate. Finally splashes from the upper vent are large enough to spill into the river and an eruption begins.

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    This work is supported by

    National Science Foundation    Yellowstone Park Foundation

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