Old Faithful
Natural feature
Majestic landmark
Lengthening intervals
The verticle height of the Old Faithful geyser historically varies from between 100 to 180 feet, with an average around 135 feet. Eruptions normally last between 1.5 to 5 minutes. Prediction of interval between eruptions is dependent upon the duration of the previous discharge. During a gusher, the steam vapor temperature rises above 350°F, while the water temperature at the vent reaches 204°F.
“Life leaps like a geyser for those willing to drill through the rock of inertia.” – Alexis Carrel