Penta Geyser
Encyclopedia
Penta Geyser sits a few feet off the path adjacent to Spasmodic Geyser in the Upper Geyser Basin of Yellowstone National Park
Yellowstone National Park
Yellowstone National Park, established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872, is a national park located primarily in the U.S. state of Wyoming, although it also extends into Montana and Idaho...

, Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

, USA.

Penta is located in the Sawmill Complex with geysers such as Sawmill Geyser
Sawmill Geyser
Sawmill Geyser, named for the whirring sound it makes during its eruption, is a geyser in Yellowstone National Park, Wyoming, USA. The geyser was named by Antoine Schoenborn of the Hayden Geological Survey of 1871....

, and Spasmodic Geyser
Spasmodic Geyser
Spasmodic Geyser is a geyser located in the Upper Geyser Basin in Yellowstone National Park in the United States.Spasmodic Geyser's eruptions from the two craters can be up to high. Water can also erupt from a few inches to ten feet high from the approximately 20 vents. The intervals between...

. Penta Geyser has five vents, providing the basis of its name. Due to its location in the Sawmill Complex, Penta has a very close relation to the activity of Sawmill and the other geysers in the area. Penta's eruptions usually begin when the water levels in the complex are rising. This usually occurs after Spasmodic, and sometimes Tardy Geyser's eruptions begin. Before an eruption, water pools up near Penta. It can flow down toward Sawmill. Even very late in these stages, Sawmill can begin to erupt and cut off Penta, causing it to drain without an eruption. Penta Geyser usually erupts with Spasmodic, and ends a few minutes after Spasmodic stops. The eruptions are more common when the Sawmill Complex is in "Penta-Churn" mode.

Penta was known at one time as "the Handsaw."
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