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Giantess Geyser

Geyser in Upper Geyser Basin, Geyser Hill Group on Firehole River on Upper Geyser Hill Trail, Observation Point Loop Snowshoe Trail in Yellowstone NP, Rocky Mountains near Old Faithful, WY

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Giantess Geyser is a fountain-type geyser in the Upper Geyser Basin of Yellowstone National Park. It is known for its violent and infrequent eruptions of multiple water bursts that reach from 100 to 200 feet (30 to 61 m). Eruptions generally occur 2 to 6 times a year. The surrounding area may shake from underground steam explosions just before the initial water and/or steam eruptions. Eruptions may occur twice hourly, experience a tremendous steam phase, and continue activity for 4 to 48 hours.

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