description Lady Knox Geyser Overview
The Lady Knox Geyser is a prominent geothermal feature located in the Waiotapu thermal area of the North Island, New Zealand. Named after Lady Constance Knox, the daughter of a former Governor of New Zealand, the geyser is uniquely induced to erupt daily through the addition of surfactants into its vent. This introduced chemical breaks the surface tension of the water, triggering a predictable eruption that can reach heights of up to 20 meters. The resulting show lasts for about an hour and is a major attraction for visitors to the geothermal valley.
help Lady Knox Geyser FAQ
Where is the Lady Knox Geyser located?
The Lady Knox Geyser is a prominent geothermal feature located in the Waiotapu thermal area of New Zealand. The area is situated on the North Island, south of the city of Rotorua. The site is part of a highly active volcanic zone.
How did the Lady Knox Geyser get its name?
The geyser was named after Lady Constance Knox, who was the daughter of a former Governor of New Zealand. The naming occurred in the early 20th century. The natural feature had originally been discovered by prison laborers who were clearing land in the area.
How is the Lady Knox Geyser induced to erupt?
Unlike natural geysers, the Lady Knox Geyser is uniquely induced to erupt daily through the addition of soap. Park guides drop a special surfactant down the geyser's vent, which breaks the surface tension of the water. This triggers a massive chain reaction, shooting water up to 20 meters high.
What is the water temperature of the Lady Knox Geyser during an eruption?
The water inside the geyser vent is boiling, easily exceeding 100 degrees Celsius. The addition of the soap lowers the boiling point of the superheated water, causing it to instantly flash into steam. This powerful expansion forces the hot water column high into the air for the crowd.
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