Uploaded March 2026 | Updated September 2026, 2 weeks ago
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UNNG-PBG-1
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.
“UNNG-PBG-1” is a catalog designation for an unnamed geyser in the Punch Bowl Group of Yellowstone’s Upper Geyser Basin. PBG-1 is a moderately small, fountain-type geyser located about 19 meters WWSW of Punch Bowl Spring. The pool is elongated, about 4.6 by 2.4 meters in size, and rimmed by a low geyserite border. A runoff channel is present at the eastern tip of the pool.
This is the description of UNNG-PBG-1 given in Bryan (2024) - The Geysers of Yellowstone, Sixth Edition: “UNNG-PBG-1 is the nearest of the pools west of Punch Bowl Spring. Active episodes are infrequent during most years, but then eruptions may recur every few minutes. The biggest bursts are just 1 foot high. More impressive were eruptions occasionally seen during the 180s, when superheated boiling was punctuated by surging up to 4 feet high.”
All clips - UNNG-PBG-1 in the afternoon of 20 May 2015.
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UNNG-PBG-1
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.
“UNNG-PBG-1” is a catalog designation for an unnamed geyser in the Punch Bowl Group of Yellowstone’s Upper Geyser Basin. PBG-1 is a moderately small, fountain-type geyser located about 19 meters WWSW of Punch Bowl Spring. The pool is elongated, about 4.6 by 2.4 meters in size, and rimmed by a low geyserite border. A runoff channel is present at the eastern tip of the pool.
This is the description of UNNG-PBG-1 given in Bryan (2024) - The Geysers of Yellowstone, Sixth Edition: “UNNG-PBG-1 is the nearest of the pools west of Punch Bowl Spring. Active episodes are infrequent during most years, but then eruptions may recur every few minutes. The biggest bursts are just 1 foot high. More impressive were eruptions occasionally seen during the 180s, when superheated boiling was punctuated by surging up to 4 feet high.”
All clips - UNNG-PBG-1 in the afternoon of 20 May 2015.
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