Old faithful eruption

Old Faithful geyser in Yellowstone National Park is one of the most predictable and famous geothermal phenomena in the world.

About this subject

Old Faithful is a cone geyser located in the Upper Geyser Basin of Yellowstone National Park, Wyoming, USA. It erupts at intervals ranging from 35 to 120 minutes, with each eruption lasting between 1.5 and 5 minutes, shooting boiling water 30 to 55 meters into the air. This predictability, rare among geysers, results from the shape of its underground chamber and the steady supply of water heated by nearby magma.

Named during the 1870 Washburn Expedition, Old Faithful became an icon of the world's first national park. Its fame attracted tourists as early as the 19th century and helped solidify Yellowstone's creation in 1872. Today, millions of visitors gather around the geyser annually to witness its regular eruptions. The U.S. Geological Survey (USGS) monitors the geyser, providing estimated eruption times based on historical data and sensors.

The geyser's activity is linked to the volcanism of the Yellowstone Caldera, one of the largest active volcanic systems on Earth. Water emerges from aquifers heated by magma chambers up to 3 km deep. Each eruption discharges about 14,000 to 32,000 liters of water. Although earthquakes and seasonal changes can affect intervals, Old Faithful remains remarkably stable.

Beyond science, Old Faithful is a cultural symbol and social hub. The surrounding area features the historic Old Faithful Inn, a rustic lodge, and designated viewing platforms. The image of the geyser erupting against a blue sky is perhaps Yellowstone's most recognizable photograph, representing the power and beauty of geothermal processes.

Frequently Asked Questions

How tall is the average eruption of Old Faithful?

The height ranges from 30 to 55 meters, with an average of about 40 meters.

How often does Old Faithful erupt?

Eruptions occur every 35 to 120 minutes, with an average interval of about 90 minutes.

Is Old Faithful the tallest geyser in the world?

No. While famous, other geysers like Steamboat Geyser, also in Yellowstone, can reach greater heights (up to 90 meters).