Uploaded January 2026 | Updated September 2026, 2 weeks ago
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Mask Geyser (1 to 11 August 2025)
Geysers are hot springs that episodically erupt columns of water. They occur in few places on Earth. The highest concentration of geysers anywhere is at the Yellowstone Hotspot Volcano in northwestern Wyoming, USA.
Mask Geyser is a multivent, fountain-type geyser in the western Fountain Group of Yellowstone’s Lower Geyser Basin. It’s about 160 meters due west of Jelly Geyser and consists of four vents in a subcircular crater about 4 meters in diameter. Mask Geyser cycles from low water to high water to overflowing. Runoff drains to the north and south, then drains westward and percolates downward into weathered gravel. During times of high water and overflow, low to moderately low splashing occurs - this occasionally leads to proper eruptions. Eruption splashing varies in intensity, height, and duration. At least three vents participate in eruptions.
Filmed from the Fountain overlook platform. All clips have been muted due to wind and hominid vocalizations - no natural sounds from the geyser are present.
Clip 1 - Mask Geyser erupting in the late morning of 1 August 2025.
Clips 2-16 - Mask Geyser erupting in the late morning & afternoon of 11 August 2025. (time stamp 0:30-on)
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Mask Geyser (1 to 11 August 2025)
Geysers are hot springs that episodically erupt columns of water. They occur in few places on Earth. The highest concentration of geysers anywhere is at the Yellowstone Hotspot Volcano in northwestern Wyoming, USA.
Mask Geyser is a multivent, fountain-type geyser in the western Fountain Group of Yellowstone’s Lower Geyser Basin. It’s about 160 meters due west of Jelly Geyser and consists of four vents in a subcircular crater about 4 meters in diameter. Mask Geyser cycles from low water to high water to overflowing. Runoff drains to the north and south, then drains westward and percolates downward into weathered gravel. During times of high water and overflow, low to moderately low splashing occurs - this occasionally leads to proper eruptions. Eruption splashing varies in intensity, height, and duration. At least three vents participate in eruptions.
Filmed from the Fountain overlook platform. All clips have been muted due to wind and hominid vocalizations - no natural sounds from the geyser are present.
Clip 1 - Mask Geyser erupting in the late morning of 1 August 2025.
Clips 2-16 - Mask Geyser erupting in the late morning & afternoon of 11 August 2025. (time stamp 0:30-on)
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