Spasmodic Geyser, Thermal geyser in Upper Geyser Basin, Yellowstone National Park, Wyoming, United States.
Spasmodic Geyser is a thermal geyser in Upper Geyser Basin at Yellowstone with two craters and twenty vents releasing water. During eruptions, water shoots up to about 15 feet high, creating a display of steaming and splashing activity.
The geyser was named during an 1878 geological expedition led by Hayden, based on its irregular eruption patterns. This unpredictability made it a subject of interest for early geoscientists studying Yellowstone's thermal systems.
The geyser takes its name from its unpredictable eruption patterns that set it apart from other thermal features in Yellowstone. Visitors can observe how its activity connects to nearby geysers, since their cycles influence each other.
You can watch eruptions from designated boardwalks built around the geyser. Activity varies considerably, so plan to spend one to three hours waiting between eruptions.
The water reaches about 92 degrees Celsius as it erupts. What makes this surprising is that eruptions stop immediately when the neighboring Penta Geyser becomes active.
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