Anemone Geyser, Dual geyser system in Upper Geyser Basin, Wyoming, United States.
Anemone Geyser is a geyser system with two separate vents, named Big Anemone and Little Anemone, located about 10 feet apart in the Upper Geyser Basin. The two features share underground plumbing connections that cause them to affect each other's eruption timing and behavior.
The geyser became part of Yellowstone when the park was established in 1872, marking the start of systematic study of the region's geothermal features. Over time, scientists have tracked how the two vents interact with each other, revealing much about geyser behavior.
Researchers and visitors gather at this location to document the distinct sounds produced during the eruption and drainage cycles of both geysers.
The site is near Old Faithful and accessible via marked trails through the geothermal area. Visitors should stay on designated paths and keep distance from the active vents, as the ground can be unstable and dangerously hot.
The two vents produce distinctive swooshing and hissing sounds during their drainage phase as water rushes into underground passages. This acoustic feature inspired the site's name and continues to fascinate those studying geothermal soundscapes.
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