Pinwheel Geyser

Last Known Eruption
2y 123d 10h 18m ago

Latest Eruptions

Eruption DurationInterval
22 Jul 2022 @ 0030 A10d 8h 0m
11 Jul 2022 @ 1630 A1y 28d 3h 16m
13 Jun 2021 @ 1314 ns2y 343d 1h 1m
06 Jul 2018 @ 12132m 30s 2y 30d 22h 43m
05 Jun 2016 @ 1330 ? A267d 2h 30m
12 Sep 2015 @ 11002m 36y 27d 23h 0m
24 Aug 1979 @ 1200 ie39d 19h 4m
15 Jul 1979 @ 1656 min2y 328d 41m
21 Aug 1976 @ 1615 A min5d 5h 30m
16 Aug 1976 @ 1045 ie min5d 1h 30m
11 Aug 1976 @ 0915 min22h 35m
10 Aug 1976 @ 1040 ie min7d 22h 10m
02 Aug 1976 @ 1230 ie min12d 21h 30m
20 Jul 1976 @ 1500 min14d 4h 57m
06 Jul 1976 @ 1003 min13d 3m
23 Jun 1976 @ 1000 A min1y 299d 20h 10m
28 Aug 1974 @ 13503d 22h 50m
24 Aug 1974 @ 1500 A4h 39m
24 Aug 1974 @ 10211d 22h 19m
22 Aug 1974 @ 1202 ie4d 3h 30m
18 Aug 1974 @ 0832 ie23h 37m
17 Aug 1974 @ 0855 ie15h 0m
16 Aug 1974 @ 17559y 352d 23h 45m
30 Aug 1964 @ 17107h 50m
30 Aug 1964 @ 092013d 19h 40m
16 Aug 1964 @ 13401h 38m
16 Aug 1964 @ 12021h 7m
16 Aug 1964 @ 105555m
16 Aug 1964 @ 100027m
16 Aug 1964 @ 093328m
16 Aug 1964 @ 090523h 50m
15 Aug 1964 @ 091515h 35m
14 Aug 1964 @ 17402h 54m
14 Aug 1964 @ 14461h 19m
14 Aug 1964 @ 13271h 18m
14 Aug 1964 @ 120924m
14 Aug 1964 @ 11452h 3m
14 Aug 1964 @ 094226m
14 Aug 1964 @ 09163d 19h 59m
10 Aug 1964 @ 131753m
10 Aug 1964 @ 12241h 36m
10 Aug 1964 @ 104847m
10 Aug 1964 @ 10012h 6m
10 Aug 1964 @ 07552d 17h 40m
07 Aug 1964 @ 14152h 20m
07 Aug 1964 @ 115516h 58m
06 Aug 1964 @ 18571h 42m
06 Aug 1964 @ 17153d 23h 27m
02 Aug 1964 @ 17482h 55m
02 Aug 1964 @ 14535d 4h 41m
28 Jul 1964 @ 101217h 2m
27 Jul 1964 @ 171028m
27 Jul 1964 @ 164234m
27 Jul 1964 @ 16081h 22m
27 Jul 1964 @ 144626m
27 Jul 1964 @ 14201h 16m
27 Jul 1964 @ 13042h 39m
27 Jul 1964 @ 10251h 30m
27 Jul 1964 @ 085515h 35m
26 Jul 1964 @ 17203h 35m
26 Jul 1964 @ 13451h 1m
26 Jul 1964 @ 124420h 51m
25 Jul 1964 @ 155322h 45m
24 Jul 1964 @ 17083h 38m
24 Jul 1964 @ 133030m
24 Jul 1964 @ 13001h 40m
24 Jul 1964 @ 11201d 19h 55m
22 Jul 1964 @ 15253h 53m
22 Jul 1964 @ 113221h 3m
21 Jul 1964 @ 14291h 14m
21 Jul 1964 @ 13153h 52m
21 Jul 1964 @ 09232d 19h 0m
18 Jul 1964 @ 14232h 22m
18 Jul 1964 @ 120125m
18 Jul 1964 @ 113652m
18 Jul 1964 @ 10444d 19h 14m
13 Jul 1964 @ 153045m
13 Jul 1964 @ 14451d 15m
12 Jul 1964 @ 143037m
12 Jul 1964 @ 13533h 23m
12 Jul 1964 @ 103029m
12 Jul 1964 @ 10011d 17h 0m
10 Jul 1964 @ 17018d 2h 21m
02 Jul 1964 @ 14402h 1m
02 Jul 1964 @ 123942m
02 Jul 1964 @ 11572d 22h 39m
29 Jun 1964 @ 131832m
29 Jun 1964 @ 124636m
29 Jun 1964 @ 12101h 10m
29 Jun 1964 @ 11004d 19h 45m
24 Jun 1964 @ 151511y 282d 23h 34m
17 Sep 1952 @ 15413m 1h 22m
17 Sep 1952 @ 14194m 1h 12m
17 Sep 1952 @ 13074m 1h 22m
17 Sep 1952 @ 11452m

Interval Statistics

Interval Count94
Min24m
Max36y 27d 23h 0m
Mean271d 9h 3m
Median3h 52m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
37931 31 Oct 2024 @ 1000 --- MAB Pinwheel channel still green, flow is reduced since 15th
37775 25 Oct 2024 @ 1630 --- MAB Channel below Pinwheel still green
37357 03 Oct 2024 @ 1033 --- SantaFe108 Dark green color over vent.
35408 21 Jun 2024 @ 1105 21 Jun 2024 @ 1220 nails Clear with suds from the large amount of runoff entering it. Runoff channels is green.
35075 10 Jun 2024 @ 1035 --- SantaFe108 Dark green, similar to Splutter Pot. Heavy runoff flows over it with lots of suds.
34807 01 Jun 2024 @ 1558 --- cb Channel & pool are deep forest green.
34580 16 May 2024 @ 1749 --- cb It's runoff channel is DEEP FOREST GREEN! No recent activity
34234 19 Apr 2024 @ 0920 --- MAB channel is green - one of the perpetual sputs downstream active the higher one not active - small tree on the berm has lost needles whether from hot steam or hot ground unknown
28986 21 Oct 2023 @ 1605 --- JR Noticeable lower water level around pool. More clearly defined feature rather than covered with water.
28643 05 Oct 2023 @ 1317 --- cb channels are dark green except for a whiteish section between the 2 active bubblers that are 15'-20' above Splutterpot.
28355 19 Sep 2023 @ 0941 --- novakg There was white stuff in the runoff channel near Pinwheel and down the channel a bit. I'm not suggesting an eruption. Green stuff is all intact. Just hotter water near the Pinwheel vent. Basically confirming Carol's earlier observation.
28235 12 Sep 2023 @ 1314 --- cb runoff channel closest to the pool is whiteish with green algae along the edges. 1/2 way to the boardwalk runoff channel is fully green.
27312 29 Jul 2023 @ 0845 --- bbev Heavy runoff, channel is white with only a hint of red or green. Large steamcloud seen from museum. Could not see any water through all the steam, only heavy runoff, after walking down.
27181 23 Jul 2023 @ 1521 --- mhreed Pea soup color mostly absent from runoff channel.
25719 23 May 2023 @ 1102 --- cb flat calm pool, vent appears to be lighter in color than the surrounding pool. no activity & no evidence of recent activity. Runoff channels have narrow ribbons that are white but mostly green in color.
24501 28 Oct 2022 @ 1838 --- MAB Channel Dark Green
24266 05 Oct 2022 @ 1455 --- cb runoff channel is green again.
22563 14 Jul 2022 @ 1040 --- cb has small blipping bubbles in the pool.
22523 12 Jul 2022 @ 1402 --- cb Pinwheels channel is white! much of the green bacterial mat has been washed to white. Pinwheel has erupted sometime between friday and this afternoon
29068 15 Jun 2022 @ 0950 --- research-mab 6/15/2022 - Pinwheel bubbling 2” @ 9:50 am
21288 15 May 2022 @ 1410 15 May 2022 @ 1420 mwolf small bursts every few minutes
21205 06 May 2022 @ 1054 --- MAB channel green
20180 28 Oct 2021 @ 0844 --- MAB channel below Pinwheel a striking dark green - a few white stripes immediately below small features but green returns asap and continues til it meets Whirligig runoff at the BW bridge just above the logger
20001 16 Oct 2021 @ 1338 --- cb Run off channel is back to mostly green color
19232 01 Sep 2021 @ 0902 --- MAB more green returning in center of channels not just edges - still very dark green upstream of Pinwheel's vent
18761 31 Jul 2021 @ 1500 --- MAB After a heavy rain Pinwheel runoff changed to pea soup color - then to pistachio ice cream color - then to bad 2% milk color - during the deluge these colors were visible above Pinwheel - after waters went down more pronounced below Pinwheel
18769 31 Jul 2021 @ 0845 --- MAB dark green above Pinwheel vent - more green growing on edges of channel farther down - center channels still white with tiny flecks of green
18667 25 Jul 2021 @ 1819 --- cb Edges of the pool are not green, they are muddy gray and pool is low by 4". Runoff channels are basically still white with more green algae on the sides than last observed.
18472 14 Jul 2021 @ 1720 --- MAB Channel still white with faint green developing in some spots along edges and past the boardwalk - very green above Pinwheel's vent area - nothing upstream has pushed out hot water
17861 16 Jun 2021 @ 0850 --- novakg Pinwheel runoff continues to be scoured white.
17839 15 Jun 2021 @ 0840 --- novakg Laurie reports that Pinwheel's runoff channel has been scoured of the green stuff and is now white.
17543 07 Jun 2021 @ 0903 --- MAB channel still green above and below Pinwheel - but there are some whitish spots farther down
14544 05 Jun 2020 @ 0903 --- bbev Tall, billowing, steam column coming from Pinwheel area. Normally green runoff channel coming from that area, now a brilliant white. Runoff under boardwalk mostly white, having taken even some of the red out of Whirligig's channel.
12926 01 Aug 2019 @ 1230 01 Aug 2019 @ 1530 cb copious discharge coming from the pinwheel area and above it that is starting to change the runoff channel color to a pockmarked light green. No eruption seen.
29127 30 Jul 2019 @ 1110 --- research-mab 7/30/2019 Pinwheel spotted @ 1110 {NOTE: with benefit of hindsight this won't be added as an eruption. Blooping and increased flow were seen by others but the channel below remained green. During this time the feature upstream was often confused with Pinwheel as well. mab}
11586 04 Jun 2019 @ 1321 04 Jun 2019 @ 1517 novakg From at least 1321 until 1517 when we left, the area near Pinwheel was "blooping," for lack of a better word. These could be seen above the bern from the Constant bench and would slightly increase the runoff from that direction.
11027 20 Apr 2019 @ 0930 --- MAB Water in runoff channel slightly murky, probably from features upstream of Pinwheel but worth mentioning.
10722 04 Nov 2018 @ 0954 --- MAB Definite convection over the vent. Earlier this summer noticed the white below Pinwheel never grew back after the July eruption - now with the algae dark dark dark DARK green the white stripe is is very pronounced. Water entering from above is green.
3308 14 Jul 2016 @ 1040 --- MAB Runoff continues in formerly dry 3rd (west) channel. 60C and green is not returning until downstream of Splutterpot. The increased flow may be from Sand Spring but that channel above Pinwheel's crater is still dark green.
3017 08 Jun 2016 @ 1500 08 Jun 2016 @ 2000 MAB Pinwheel runoff brighter white, twigs wet and moved, some water in 3rd (west) runoff channel. Basin had been closed due to thermal death incident, but I will ask staff if they had seen anything out of Pinwheel since the 5th when things are calmer.
2484 05 Oct 2015 @ 1055 --- MAB Steamy morning. Upon arrival 1030 water was flowing in the 3rd (west) runoff channel and the flat sinter spot was half-wet and debris moved to the east. Just before 1055 I noticed increased steam and runoff, and saw the flat sinter spot was submerged. A push from Pinwheel, or something else upstream? Too steamy to tell, but it's worth watching. Though I saw that flow increase, green is growing back in the 2 easterly channels.
2399 21 Sep 2015 @ 0940 --- MAB Flat sinter area in westerly runoff channel, my visual 'marker' (not the formerly green and not with water currently flowing) was wet upon arrival, and dried off and remained dry the rest of the day. Convection seen in the pool later in the warmth of day at 1352 and 1625 (the times I looked, not implying that's the only time it had convection)
2376 18 Sep 2015 @ 1151 --- MAB Slight convection in the vent observed all day when visiting this spot. I left to go watch Graceful and get the end. Upon my return the runoff was cloudy, and a previously dry area in the most westerly runoff channel (not the ones usually green) was wet. It was dry again by afternoon. Unknown if this came from a Pinwheel push or from that thing upstream around the corner. I include the time here in case we see it on YVO, but (!) Whirligig started right after that, so will probably be indistinguishable.
2355 15 Sep 2015 @ 0948 15 Sep 2015 @ 1748 MAB Lots of water coming through the pool from above on a rainy steamy day. Slight convection in the vent and a few blips were observed in late afternoon 1548,1735. I will observe the spouter around the corner and watch for lulls to see how the Pinwheel pool looks then. No sign of green regrowth in the runoff channel.
29452 04 Aug 2012 @ 1200 --- research-mab 8/4/2012 - no time noted - Pinwheel is very cloudy and grey-green color and is bubbling from two spots and is making all the runoff cloudy. It is normaly [sic] clear.
30282 24 Aug 1993 @ 1200 --- research-mab 8/24/1993 - no times noted - [NOT PINWHEEL SPECIFIC] - Porcelain Basin shows dark runoff & lowered water levels
30338 07 Jun 1992 @ 1200 --- research-mab June 7, 1992 - no time noted -Bright green runoff from Pinwheel area
30677 14 Sep 1990 @ 1200 --- research-mab 9/14 no time noted - disturbance continues. - Pinwheel runoff’s Cyanidium white again.
30614 27 Apr 1990 @ 1200 --- research-mab 4/27/1990 - no time noted - Runoff channel from Pinwheel is lime green.
30697 28 Jun 1989 @ 1200 --- research-mab 6/28/1989 - no time noted - Pinwheel’s outflow channel has changed from Emerald green to white and Congress Pool has two vent like holes in bank near waterline and a third appears to be forming. Still clear water in Congress.
33435 06 Oct 1986 @ 1200 --- research-mab October 6, 1986 - no time noted - PINWHEEL is completely muddy, with steady throughflow.
30958 21 Aug 1985 @ 1200 --- research-mab 8/21/1985 - no time noted - Pinwheel Geyser Pool = 151º Dormant, having runoff no stir in the pool in the slightest way.
7627 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Pinwheel Geyser - Slowly being filled with sediment, slightly turbid, dark green algae present.
31155 29 Aug 1983 @ 1200 --- research-mab 8/29/1983 temperatures - no time noted - Pinwheel Geyser – 192º temp taken in center, clear water w/grn algae along fringes. Bloodworms floating in from above runoff to become cooked!!
31207 15 Jan 1982 @ 1200 --- research-mab January 15th, 1982 - no time noted - Pinwheel Geyser 152º (crossed out with ? Mark) calm, green algae lined.
31602 11 Dec 1981 @ 1200 --- research-mab Dec 11 1981 - no time noted - Pinwheel 102º light green algae lined, calm
31553 12 Sep 1981 @ 1200 --- research-mab Sept 12 1981 - no time noted - Pinwheel 109°- bloodworms in center where temp taken, water level w/surr grnd
31511 13 Aug 1981 @ 1200 --- research-mab Aug 13 1981 - no time noted - Pinwheel’s water is down about a foot so that no single pool exists. Water is in 4 separate vent areas & 1 vent continually bubbles 6”
31502 10 Aug 1981 @ 1200 --- research-mab Monday Aug 10, 1981 - no time noted - Pinwheel bubbling up with low water level.
31440 02 Aug 1981 @ 1200 --- research-mab Sunday August 2 1981 The Basin Wide Disturbance has occurred! - no time noted - Pinwheel – 120º very turbid dark grey-brown
31464 02 Aug 1981 @ 1200 --- research-mab Sunday August 2 1981 - no time noted - Pinwheel Geyser 130ºF
4621 29 Sep 1980 @ 1200 --- research-mab 9/29/1980 - no time - Pinwheel Geyser was likewise drained and considerably hotter- water level was down 16 inches temp 195 -There was absolutely no water flowing into or out of Pinwheel
31809 27 Sep 1980 @ 1200 --- research-mab Saturday September 27 1980 - no time noted - Pinwheel – filled back up again, gray water 101ºF
31788 22 Sep 1980 @ 1100 --- research-mab 9-22-1980 - inferred time - Water flow leaving Porcelain Basin was down sharply today. Perhaps 1/5 of normal flow. Part of the decrease was due to Blue Geyser draining during the morning. Soon after...Blue Quit, Pinwheel drained. Green algae is beginning to make a reappearance in Constant’s runoff. All other algae remains mud coated.
4613 22 Sep 1980 @ 1030 --- research-mab 9/22/1980 Pinwheel Dark gray, turbid, and gently bubbling from close to a dozen locations, small amount of water flowing in and out at 10:30. By 11:10 Pinwheel had drained serving as a receptacle for water flowing from northern portions of Porcelain Basin.
31746 09 Sep 1980 @ 1201 --- research-mab Tuesday Sept 9 1980 - no time noted - Pinwheel Geyser - green bottom, slightly murky 110°F, water entering 144°F so Pinwheel is cooling the water entering it.
31623 08 Jun 1980 @ 1200 --- research-mab June 8 1980 - no time noted - Pinwheel Geyser – 120ºF, nice green algae, clear water, water flowing into pinwheel -116ºF
32017 04 Oct 1979 @ 1200 --- research-mab October 4 1979 - no time noted - Blue still muddy & sending muddy water into Pinwheel which has filled back up and is overflowing.
31993 27 Sep 1979 @ 1200 --- research-mab September 27 1979 - no time noted - Pinwheel – 99ºF muddy grey drain for water of Porcelain Basin. Runoff entering Pinwheel at 100ºF
31980 26 Sep 1979 @ 1200 --- research-mab September 26 1979 - no time noted - Pinwheel continues to be a receptacle for the waters of Porcelain Basin. Pools are clearing up through Porcelain, however, the out flow of water remains a turbid grey and low in volume.
31973 21 Sep 1979 @ 1200 --- research-mab Friday September 21 1979 - no time noted - More end of summer changes! Pinwheel Geyser has drained 5 inches below normal level. This morning there was no water draining into it from the plain to the north.
31954 20 Sep 1979 @ 1800 --- research-mab Thursday Sept 20 1979 - Disturbance check after 1730 - Pinwheel Geyser - Water level 2 to 3 inches above normal level and flooding over a much larger area. Most likely due to heavy runoff of dark gray water flowing into it. Pool itself it an opaque dark gray. 116ºF.
31936 18 Sep 1979 @ 1200 --- research-mab Sept 18 1979 - no time noted - Pinwheel Geyser 141°
31920 04 Sep 1979 @ 1200 --- research-mab Sept 4 1979 - no time noted - When we reached Pinwheel there were no signs of activity. The orange algae that had been growing right up to the vent now has died 5 feet back. (looks old though)
31914 28 Aug 1979 @ 1200 --- research-mab Aug 28 1979 - no time noted - Pinwheel splashing around, not as turbid as when this activity was noted earlier in the summer. There is not as much water flowing down the channels in Porcelain Basin.
31907 24 Aug 1979 @ 1200 --- research-mab August 24 1979 Pinwheel was splashing to 2 feet at 12:00 today. Muddy Grey water.
31831 18 Jun 1979 @ 1200 --- research-mab June 18 1979 - no time noted - Pinwheel is cleared up and quiet today but does have a new sediment layer coating the bottom
5023 17 Jun 1979 @ 1400 --- research-mab 06/17/1979 By 1400 this afternoon Pinwheel had cleared up considerably and was no longer boiling up. Blue Geyser back in operation by 1345
5022 17 Jun 1979 @ 1015 --- research-mab 06/17/1979 Pinwheel may be reactivating. The pool is very muddy, with increased overflow and periodic boiling several inches high. Must keep an eye on Pinwheel. Periodically splashing up to 2’
32220 15 Sep 1978 @ 1200 --- research-mab 09/15/1978 - no time noted - ...basin wide disturbances continue! - Sand Spring – water has been drained out for at least 2 days. Temp 165ºF = Pinwheel Geyser – water level down 1 inch. Very little run off entering with Sand Spring down. Grey water in pool. Temp 126ºF
32191 09 Sep 1978 @ 1200 --- research-mab 09/09/1978 - no time noted - Pinwheel Geyser – had quite murky water. A number of pine needles were stirred up. Algae still present.
5120 06 Sep 1977 @ 1200 06 Sep 1977 @ 1730 research-mab 09/06/1977 The drain-fill cycle of Pinwheel is related to the drain-fill-erupt pattern of Blue Geyser. At ~1200 Blue was erupting & Pinwheel was full. At 1730 Blue was drained & Pinwheel was losing water.
32322 04 Sep 1977 @ 1200 --- research-mab 09/04/1977 - no time noted - There is no water draining into Pinwheel. & no water leaving. The pool itself is down about a foot & bubbling 6-8” high.
32318 02 Sep 1977 @ 1200 --- research-mab 09/02/1977 - no time noted - Although Sand Spring still has no runoff there is more water draining into Pinwheel.
5127 29 Aug 1977 @ 1800 --- research-mab 08/29/1977 Pinwheel Geyser is drained down about a foot or so that there is no runoff and only a small amount of incoming water.
32314 24 Aug 1977 @ 1200 --- research-mab 08/24/1977 - no time noted - Pinwheel – H2O down 3” 162° bubbling <1’ = a group of bubblers south of Pinwheel are active {temps also include splutter pot big whirligig little w constant africa fireball}
5118 21 Aug 1977 @ 1800 --- research-mab 08/21/1977 After the influx of water comes the lack of water in Sand Spring is no longer overflowing so less water is draining into Pinwheel. More water flows out of Pinwheel than is flowing in.
32527 03 Sep 1976 @ 1200 --- research-mab 09/03/1976 - no time noted - Pinwheel- bubbling actively, much silt on bottom, the orange is not algae 191º
5558 21 Jul 1976 @ 1520 21 Jul 1976 @ 1600 research-mab 07/21/1976 Pinwheel shows increased activity this p.m. Large splashes witnessed from 3:20 to nearly 4:00.
32433 20 Jul 1976 @ 1201 --- research-mab July 20 1976 - no time noted - Porcelain Basin observations in pm: It was noted that as Big Whirligig erupted the height of Pequito increased & Pinwheel showed bubbling activity.
5561 14 Jul 1976 @ 1800 --- research-mab 07/14/1976 Pinwheel geyser was bubbling to a height of 2’. It seems to be loosing its algal bed. Also rocks have been thrown in this area.
5541 06 Jul 1976 @ 1800 --- research-mab 07/06/1976 Pequito has been acting in its usual pattern while Pinwheel has been ejecting more silt & rather vigorous bubbling.
5539 30 Jun 1976 @ 0845 --- research-mab 06/30/1976 {Pequito erupting....} Eroded channels near boardwalk were dry, but Pinwheel was splashing away and emitting loud popping sounds.
32383 29 Jun 1976 @ 1223 --- research-mab June 29 1976 Pinwheel active bubbling 1223, still going 1250 {Later entry same day no time noted ->] Watched new geyser & Pinwheel for 25 min. At beginning of watch, new geyser was erupting about 1’ high & its eroded channel by the boardwalk was dry. Then it began pulsing higher & the channel filled with water. Pinwheel began emitting large bubbles from its vent & splashing as high as 2’ was seen. Big Whirligig began erupting after 5 minutes of this type of play.
32382 27 Jun 1976 @ 1236 --- research-mab Sunday June 27 1976 {Pequito} 1236 New geyser erupted again 15’ with much H20- doused the overlook area & wonders of wonders Pinwheel started to bubble up approx 1 foot. Eruption lasted until 1241
5532 25 Jun 1976 @ 1230 --- research-mab 06/25/1976 Pinwheel -- renewed activity. Small eruptions were coming from main vent during Little Whirligig 1230 (Time approximately 1230)
32371 18 Jun 1976 @ 0825 --- research-mab June 18 1976 - Lots of activity down at the platform in Porc. Basin at 0825. The new spouter was in a strong steam and mist phase. Pinwheel was popping and bursting, and splutter pot was also bubbling.
32362 06 Jun 1976 @ 1200 --- research-mab June 6 1976 - no time noted - Pinwheel generating large steam bubbles in main vent. Algal beds still intact.
5701 07 Sep 1975 @ 1800 --- research-mab 09/07/1975 Pinwheel continues to fluctuate, sometimes overflowing other times not.
5692 31 Aug 1975 @ 0845 --- research-mab 08/31/1975 Runoff channel from Pinwheel full of water at 0845 but dry about noon.
No attachments for this geyser.
Baseline does not exist.
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