Plume Geyser erupts about every 20 minutes. Its 3–5 quick bursts can reach heights of 25 feet (8m). This is a relatively young geyser that came into existence when a steam explosion created its vent in 1922.

Plume Geyser has an average temperate of 191.2°F (88.5°C), an average pH of 8.3, and an average conductivity of 1961 uS/cm.

Geysers

Geysers have constrictions in their plumbing systems that prevent water from moving freely to the surface where heat would escape. Water beneath the constrictions creates a buildup of steam. Eventually the steam pushes water past the constrictions and the geyser erupts.

Cone or Fountain Geyser?

Cone geysers erupt in a narrow jet of water, usually from a cone.

Fountain geysers shoot water in various directions, typically from a pool. A fountain geyser has a large opening at the surface that usually fills with water before or during an eruption. Steam bubbles rising through the pool during the eruption cause separate bursts of water that generally spray out in all directions.

Fountain geysers are the most common type of geyser and can range from very small to very large.

Upper Geyser Basin

The majority of world’s active geysers are in the Upper Geyser Basin, including Old Faithful. Only four other places in the world have large concentrations of hydrothermal features: Russia (Kamchatka), Chile, New Zealand, and Iceland.

The heat for the hydrothermal features comes from Yellowstone’s volcano. Molten rock or magma may be as close as 3-8 miles (5-13 km) underground. Rain and snow supply water that seeps down several thousand feet (more than a kilometer) below the surface where it is heated.

Underground cracks form a natural plumbing system. Hot water rises through the plumbing to produce hot springs and geysers.

Use Caution in Hydrothermal Areas

• Stay on boardwalks and designated trails.
• Hydrothermal water can severely burn you.
• Never run, push, or shove.
• Supervise children at all times.
• Do not scratch hydrothermal mats.

You are responsible for your safety.

Think safety, act safely. Yellowstone is a dangerous place.