Cliff Geyser full pool eruption time lapse (evening, 5 August 2025) @jsj1771

Uploaded August 2025 | Updated September 2026, 2 weeks ago

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Time lapse video from 5:47 to 6:21 PM, 5 August 2025. One frame per second & 30 frames per second of video.
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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 (northwestern Wyoming, USA).

Cliff Geyser is the largest frequently-erupting geyser in the Black Sand Basin of Yellowstone’s Upper Geyser Basin. It is located on the western bank of Iron Spring Creek and is separated from the stream by a ~1.5 meter tall cliff of geyserite. Cliff Geyser has a semicircular basin that is about 10 x 15 meters in size. The basin can be empty, partially filled, or overflowing with water. Eruptive activity occurs at a low-pool stage, high-pool stage, and at an overflowing, full pool stage. Spouting can reach an estimated 30 to 50 feet high.

Seen here is a time lapse video of Cliff Geyser in the late afternoon to early evening of 5 August 2025, including a full pool eruption from 6:05 to 6:18 PM (duration = ~13 minutes).

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Cliff Geyser full pool eruption time lapse (evening, 5 August 2025)

$Unnamed Black Sand Basin hydrothermal features Unnamed Black Sand Basin hydrothermal features Geysers are hot springs that episodically erupt columns of water. They occur in few places on Earth. The highest concentration of geysers anywhere is at the Yellowstone Hotspot Volcano (northwestern Wyoming, USA). Seen here are video clips of four apparently-unnamed hydrothermal features in the Black Sand Basin of Yellowstone’s Upper Geyser Basin. The first feature is a perpetual spouter 18 meters southwest of Ragged Spring. The second feature is a moderate-sized hot spring 22 meters south-southwest of Jagged Spring. The third and fourth features are a little south of Jagged Spring. Black Sand Basin videos: https://www.youtube.com/playlist?list=PL8dL6UmmXTBVwmCwqDQXjddb1pn82Whbf Clips 1-6 - Unnamed perpetual spouter (1 - 6 August 2013; 2 - 4 June 2014; 3 - 2 June 2016; 4-6 - 19 June 2023). Clips 7-13 - Unnamed hot spring (7-8 - 4 June 2014; 9-13 - 19 June 2023). (time stamp 1:54) Clip 14 - Unnamed active fracture on 19 June 2023. (time stamp 3:59) Clip 15 - Unnamed feature on 19 June 2023. (time stamp 4:32)$

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$Cinnamon Spouter & West Cinnamon Geyser (2026) Cinnamon Spouter & West Cinnamon Geyser (2026) 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. Cinnamon Spouter and West Cinnamon Geyser are located in the Black Sand Basin of Yellowstone’s Upper Geyser Basin. Cinnamon Spouter’s irregularly-shaped basin is 3 to 4 meters in diameter, with a centrally-located and irregularly-shaped vent area. West Cinnamon Geyser is located on the southwestern side of Cinnamon Spouter and has a subcircular basin 2 to 3 meters in diameter, with a ~1 meter diameter inner crater. Cinnamon Spouter first appeared in the late 1980s, under a tourist boardwalk. Early activity consisted of periodic geyser eruptions. The long-term, normal behavior of Cinnamon Spouter has become moderately low perpetual spouting that reaches about two meters high or less (usually much lower). After individual periodic eruptions occur in adjacent West Cinnamon Geyser (for example, in 2016), Cinnamon Spouter’s water level lowers and runoff ceases. Low-pool perpetual spouting can continue or activity can cease altogether, with water draining out of sight. Runoff water from Cinnamon Spouter drains to the south and southeast toward Iron Spring Creek. In 2025 and 2026, the distal runoff channel was completely dry - overflow was no longer occurring. In 1998, researchers measured the water temperature of Cinnamon Spouter at about 75° Celsius, with a pH of about 8.3 (= somewhat alkaline). West Cinnamon Geyser (also known as Cinnamon West Geyser) appeared subsequent to Cinnamon Spouters first appearance in the late 1980s. West Cinnamon Geyser was initially a fracture but has since widened into its present shape. Its normal behavior is low to very low perpetual spouting. It also has 1 to 2 meter tall geyser eruptions that occur in series, with hours- to days-long intervals between series. The first two eruptions in a series pour out large volumes of water for such a small feature. Water runs off toward the south and southwest and percolates downward into the siliceous sinter gravel. In August 2026, Cinnamon and West Cinnamon were erupting as perpetual spouters, but West Cinnamon’s splashing energy cycled from quite mild to fairly energetic (“eruptions”). Black Sand Basin videos: https://www.youtube.com/playlist?list=PL8dL6UmmXTBVwmCwqDQXjddb1pn82Whbf Cinnamon Spouter & West Cinnamon Geyser videos: https://www.youtube.com/playlist?list=PL8dL6UmmXTBUmX-oDOu73QM468Cr96CpJ All clips - Cinnamon Spouter (right) & West Cinnamon Geyser (left) erupting in the mid-afternoon of 9 August 2026.$

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