Maximum eruption height55 m
367Hot dogs
83.3Pillow lengths
9.02Boxing ring sides
Photo from Wikimedia Commons
Old Faithful
The world's most predictable geyser/Landforms
Old Faithful in Yellowstone National Park has been erupting with remarkable regularity since at least 1870 when it was first documented by the Washburn Expedition. It erupts approximately every 90 minutes, shooting boiling water 30 to 55 meters into the air for 2 to 5 minutes. Each eruption expels between 14,000 and 32,000 liters of superheated water. It is not the tallest or most powerful geyser in Yellowstone, but it is the most famous because it shows up on time.
Measurements
Water per eruption23 m³
1.9 trillionthsLake Superiors
4.6 millionTeaspoons
14,000–32,000 liters; average ~23,000 liters
Average eruption duration240 s
115 quadrillionthsDinosaur extinctions ago
4Microwave minutes
1.14Pop songs
2–5 minutes; average about 4 minutes
Average interval between eruptions5,580 s
7.8 tenthsNaps
177 millionthsEarth years
15.1 billionthsHolocene eras
About 93 minutes
Water temperature at vent369 K
1.04Fresh bread loaves
1.19Body temperatures
96°C; just below boiling at Yellowstone's elevation
Ejection speed32 m/s
2.58Usain Bolt sprints
26.7 billionFingernail growths
3.5 hundredthsSound in helium
Water exits the vent at roughly 70 mph