InDepth - Predicting Old Faithful

Описание: Old Faithful was once called “Eternity’s Timepiece” because of the regularity of its eruptions. However, this geyser has never erupted at exact hourly intervals as many believe. Ranger Darlene Bos explains how we predict eruptions for this popular geyser. Produced by NPS/Neal Herbert, with additional filming by David Restivo and Jay Elhard.