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World's Tallest Geyser


Steamboat Geyser in Yellowstone National Park has produced taller eruptions than any other active geyser.


Steamboat Geyser

Steamboat Geyser: Photograph of Steamboat Geyser of Yellowstone National Park erupting in 1961. Photo by E. Mackin, National Park Service.

Which Geyser is the World's Tallest?

Steamboat Geyser in the Norris Geyser Basin of Yellowstone National Park has produced several eruptions between 300 and 400 feet in height. These eruptions have been taller than those produced by any other active geyser. It can be called the "world's tallest geyser."




Most Eruptions are Small

Eruptions at Steamboat Geyser are rare and usually small in size. The typical eruption reaches a height of 40 feet or less. It also erupts infrequently and on an unpredictable schedule. There have been 167 recorded eruptions since 1878, with an eruption interval that ranges between four days and fifty years.

Because of the infrequent and irregular eruption schedule, careful measurements have not been made of most eruptions. Their heights have been estimated from the descriptions of witnesses and from rare photographs and videos.

Steamboat Geyser - Steam Phase

Steamboat Geyser - Steam Phase: Photograph of the steam phase of an eruption at Steamboat Geyser of Yellowstone National Park. National Park Service photo.

Major Eruptions

Major eruptions at Steamboat Geyser begin with water jets from two vents followed by a major blast from the main vent that reaches heights of between 300 and 400 feet. In addition to mineral-rich steam and water, eruptions produce large volumes of mud, sand, and rocks. Up to 700 cubic feet of debris can be produced from a single major eruption. Trees near the geyser have been broken by falling debris, and their trunks have been undermined by torrents of runoff water.

The water phase of a major eruption can last for up to 40 minutes. Then the geyser continues with a roaring steam phase that can last between several hours and a few days.



Waimangu Geyser, New Zealand

Waimangu Geyser, New Zealand: Eruption photo of Waimangu Geyser, near Rotorua, New Zealand. Waimangu was active between 1900 and 1904. It was named "Waimangu," a word in the Maori language that means "black water." This name was used because eruptions usually contained large amounts of rock and soil, giving the eruption plume a black color. Public domain image from Wikimedia.

Larger, Extinct Geysers



Recent Eruptions of Steamboat Geyser
July 31, 2013
May 23, 2005
October 22, 2003
April 27, 2003
March 26, 2003
September 13, 2002
April 26, 2002
May 2, 2000
October 2, 1991

The largest geyser in recorded history is Waimangu Geyser, located near Rotorua, New Zealand. It was observed erupting to heights of about 1,500 feet between 1900 and 1904. A landslide caused the geyser to become extinct in 1904. The name "Waimangu" is a word from the native Maori language which means "black waters." This name was given because eruptions included large amounts of mud and rock - enough to make the eruption plume a black color.

Two Yellowstone geysers, Excelsior Geyser in Midway Basin and Sapphire Pool Geyser in Biscuit Basin, have also produced eruptions that exceeded 300 feet. Excelsior was active between 1878 and 1888. Sapphire Pool erupted after the Hebgen Lake earthquake in 1959 and erupted periodically for a few years. Both of these geysers are thought to be extinct.

geyser-like eruptions on Saturn's moon Enceladus

Geyser-like eruptions on Saturn's moon Enceladus: Image from NASA's Cassini spacecraft showing eruption plumes from numerous geysers on Saturn's moon Enceladus. These geysers spray jets of water tens of miles above the moon's surface.

Geyser Information
[1] Yellowstone's Steamboat Geyser Roars to Life for First Time in 8 Years: Becky Oskin, article on the NBC News website, last accessed August 2016.

[2] Steamboat Geyser: Fact Sheet published by Yellowstone National Park, August 2013. Last accessed August 2016.

Other Tall Geysers in the Solar System

Earth is not the only location in the solar system where geysers can be found. Icy jets of water have been detected erupting from Enceladus, a moon of Saturn, and Io, a moon of Jupiter. These eruptions produce very tall plumes because the force of gravity on these moons is very low.

In 2011, NASA's Cassini spacecraft completed a flyby of Saturn's moon Enceladus. The spacecraft was deliberately flown over a geyser during an active eruption. At an elevation of approximately 62 miles above the moon's surface, Cassini flew through a spray of water particles. These tiny, icy moons produce the tallest known geysers in the solar system.

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