Last Known Eruption
257d 6h 44m ago

Latest Eruptions

Eruption DurationInterval
20 Jun 2023 @ 1311345d 17h 37m
09 Jul 2022 @ 1934 ie9d 5h 43m
30 Jun 2022 @ 13513y 312d 19h 49m
22 Aug 2018 @ 18025y 191d 3h 2m
13 Feb 2013 @ 1400 A29y 218d 11m
18 Jul 1983 @ 1449 ie1y 9d 20h 19m
08 Jul 1982 @ 1830 ie337d 2h 7m
05 Aug 1981 @ 16231h 7m 13d 0m
23 Jul 1981 @ 16231h 7m 5y 22d 3h 53m
02 Jul 1976 @ 1230

Interval Statistics

Interval Count9
Min9d 5h 43m
Max29y 218d 11m
Mean5y 81d 4m
Median1y 9d 20h 19m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
29038 22 Oct 2023 @ 0956 --- SantaFe108 Full and bubbling in both vents on arrival. Dropped at 1003. Made a weird sort of bathtub drain noise right as Corporal ended. Water visible again at 1009 with Corporal resuming bubbling in the back. Dog's Leg full at 1010 and bubbling resumed.
27178 23 Jul 2023 @ 1441 --- mhreed Small bubbles in both vents. Water level 2 inches below rim.
26671 25 Jun 2023 @ 1457 --- steve Water rising and falling but that’s all I saw.
23316 21 Aug 2022 @ 0745 --- ypcaribou Water in both vents to about 1" from top. Bubbling in both vents, though random.
22384 07 Jul 2022 @ 1106 --- steve I could see steam rising from the vent and hear water bubbling but no water. A few minutes later the vents filled with bubbling water.
22246 30 Jun 2022 @ 1347 --- cb Deep deep grumbling growling gurgling sounds! 1349 water a rising
21342 17 May 2022 @ 0850 --- mhreed Clunking noises at depth. During Corporal eruption. Two minutes later, water slowly filled with ~3 inch splashing.
21279 14 May 2022 @ 1632 --- mhreed Water one inch below overflow.
20089 22 Oct 2021 @ 0906 --- MAB water level same - down about 6in but visible
20025 17 Oct 2021 @ 0917 --- MAB still 6in down but water is visible
19950 10 Oct 2021 @ 1652 --- MAB resting water level up ~1in from Tuesday- still low about 5in below rim
19905 05 Oct 2021 @ 0857 --- MAB visible water 6in down - with blurpy noises as Corporal began
19550 08 Sep 2021 @ 1015 --- CrisG No water noted in spring before, during, or after eruption of Corporal. Vents do steam in cooler conditions.
14674 18 Jun 2020 @ 1838 --- jkgood Water visible- several inches below surface
14672 18 Jun 2020 @ 1014 --- jkgood No water visible
11327 22 May 2019 @ 0703 --- Kyle no water visible in either vent. audible gurgling sounds at depth
11319 21 May 2019 @ 0908 --- Kyle water visible in vent approx 3-4 in below rim, calm
11330 20 May 2019 @ 0821 --- Kyle water on both vents, calm, 3 in below over flow
9711 13 Aug 2018 @ 1118 --- Kent Dog Leg @ Norris - Water in pools but down two inches. No activity.
29602 21 Sep 2016 @ 1148 --- research-mab 9/21/2016 Dog’s Leg Springs vents are filled with water almost to the brim 1148
4721 08 Sep 1998 @ 1800 --- research-mab 9/8 Dog leg looked odd today. Instead of filling quietly after Corp’s eruption, it had rapid boiling out of 2 vents. Hmmm
30024 19 Jun 1996 @ 1200 --- research-mab 6/19/1996 - no time noted - Dog Leg is very low but Corporal and Veteran seem about normal.
30297 06 Sep 1993 @ 1515 --- research-mab 9/6/1993 Also the small vents with yellow sulfur near Veteran/Corporal has changed. This AM the vents were empty as they have been since the disturbance. This afternoon around 3:15 the two vents had hot water to the rim of the vents.
7594 05 Feb 1989 @ 0000 05 Feb 1989 @ 2359 JSJ Dog's Leg Spring - no recent (last month) runoff. Water level varies.
4842 14 Aug 1988 @ 1800 --- research-mab 8/14/1988 Dog’s Leg is overflowing more, but not erupting
30828 06 Aug 1988 @ 1200 --- research-mab 8/6/1988 - no time noted - Dog’s Leg- no noticeable change from earlier in the season
30884 17 Aug 1987 @ 1200 --- research-mab 8/17/1987 - no time noted - Dog’s Leg ph 4, T 166ºF * This geyser erupts to about 6”-12” periodically Corporal ph4, T 157ºF
30879 04 Aug 1987 @ 1200 --- research-mab Aug 4 (1987) - no time noted - Dog Leg & Corporal Geyser are quiet.
30874 02 Aug 1987 @ 1200 --- research-mab August 2, 1987 - no time noted - Dog Leg was not erupting at last observation-
30868 28 Jul 1987 @ 1200 --- research-mab 7-28-1987 - no time noted - Dog’s Leg is spouting perpetually to 3 ft and overflowing into Corporal Geyser.
33455 15 Mar 1987 @ 1200 --- research-mab March 15, 1987 - no time noted - Corporal Geyser and Private (or Dog’s Leg) Geyser– The mystery geyser was in a calm boil around 6-9 inches high. Corporal is impossible to [tell] if it is in or not in eruption because of the overflow into its crater. Corporal may not even be active!
30938 03 Jul 1985 @ 1200 --- research-mab July 3 1985 – no time noted - Dog Leg 197ºF boiling continuously & overflowing into Corporal
31073 20 May 1983 @ 1200 --- research-mab May 20 1983 - no time noted - Disturbance!... Dog’s Leg- Little change. Splashing several inches and overflowing into Corporal. Corporal itself is clear and quiet.
31068 19 May 1983 @ 1200 --- research-mab May 19 1983 - no time noted - Dog’s Leg – Full and splashing 6-8 inches.
31062 12 May 1983 @ 1200 --- research-mab (May 12 83) - no time noted - Dog’s Leg – Continuously overflowing into Corporal. Dog’s Leg’s vent is coated with sulfur, and at the point where Dog’s Leg’s water entered Corporal’s crater, there is a yellow patch of sulfur also.
31039 08 Jan 1983 @ 1200 --- research-mab January 8 1983 - no time noted - Dog’s Leg sulphur lined & bubbling 188º overflowing into Corporal
31361 31 Jul 1982 @ 1200 --- research-mab 7/31/1982 - no time noted - Dog’s Leg 176° clear calm H2O Corporal 176° dark green slightly turbid H2O, calm
31324 10 Jul 1982 @ 1515 --- research-mab 7/10/1982 Dog Leg Spring: boiling @ 1515 - Corporal: boiling @ 1515, splashing 4-6” no overflow
31312 08 Jul 1982 @ 1200 --- research-mab 7/8/1982 - “About 1200” - Corporal - down with no overflow but channel still has running water Dog Leg Spring – full to 2 inches below sinter platform, boiling Wet area for Dog Leg along edge of Corporal onto trail. Dog Leg major? → New hot spot on trail directly across from Corporal. Ground is also wet there.
31243 20 Feb 1982 @ 1200 --- research-mab February 20 1982 - no time noted - Corporal Geyser 142º green algae lined. Receiving Dog’s Leg’s runoff & causing it to overflow slightly. I don’t think that it is erupting anymore.= Dog’s Leg 188º Yellow sulfur around vent & in runoff with filamentous bacteria waving in the H20. (A week later, it was boiling vigorously along the vent.)
31186 14 Jan 1982 @ 1200 --- research-mab January 14th 1982 - no time noted - Corporal Geyser – 138º calm, still overflowing periodically. Dog’s Leg now has its own 4’ pool. A new vent has been formed & the water level is up~4”. There is constant overflow into Corporal but it still seems to be erupting. Occasional gentle boil & pool) has a sulphur lining. 184º
31573 15 Nov 1981 @ 1200 --- research-mab Nov 15 1981 – no time noted – {post-quake check} Corporal 164° between eruptions, dark green clear H2O = Dog’s Leg 174° between eruptions
31492 09 Aug 1981 @ 1200 --- research-mab Sunday August 9, 1981 - no time noted - Corporal & Dog’s Leg are back to behaving normally again with Dog’s Leg draining as Corporal’s water level rises. After Corporal’s overflow & subsequent lowering of water Dog’s Leg is filling back up again.
31482 05 Aug 1981 @ 1623 --- research-mab August 5, 1981 - inferred time - Dog’s Leg has blown out a new vent! Now is ~3 ½’ by 1’ (tiny sketch) splashing to 3’ in left vent & 2’ in right. 200º Board walk moved.
31785 20 Sep 1980 @ 1200 --- research-mab Saturday September 20 1980 - no time noted - Dog’s Leg – filled 2/3 and bubbling 163º, following drain, then fill up 170ºF = Corporal Geyser – slightly murky 161ºF before eruption 172 at vent during eruption
31693 16 Aug 1980 @ 1200 --- research-mab Sat Aug 16 - no time noted - Corporal Geyser- Slightly murky, not in eruption. Temp. 170°F = Dogs Leg – Full of clear water – 176°F
31669 17 Jul 1980 @ 1200 --- research-mab July 17, 1980 - no time noted - Corporal Geyser 170°F not ie, 179°F while ie = Dogs Leg – 176°F when full pool, 181°F while refilling following a Corporal eruption
31635 09 Jun 1980 @ 1200 --- research-mab June 9 1980 - no times - observations made over the week and entered on 9th - Corporal Geyser – 164ºF before eruption, 181ºF during eruption = Dog’s Leg Spring 179ºF before and after drain during Corporal’s eruption
31959 20 Sep 1979 @ 1800 --- research-mab Thursday Sept 20 1979 - Disturbance check after 1730 - Corporal Geyser and The Dog’s Leg – The trail south of these two features was found to be very wet. Foot prints covering water flowing makes point towards the possibility of a major eruption last night. Dogs Leg (170ºF) bubbling hard before Corporal eruption. As Corporal erupts, Dogs Leg drained with loud gurgling. Corporal temp ie 176ºF. It seemed to me that the odor of H2S was stronger in the basin this evening.
31887 29 Jul 1979 @ 1200 --- research-mab July 29 1979 - no time noted - Dog’s Leg – 182ºF, ph 4.3, Corporal before eruption 164ºF, ph 4.3
31864 05 Jul 1979 @ 1200 --- research-mab July 5 1979 - no time noted - Corporal Geyser 167ºF as it was starting an “eruption” = Dog Leg 177ºF
32217 15 Sep 1978 @ 1200 --- research-mab 09/15/1978 - no time noted - ...basin wide disturbances continue! - Corporal Geyser – 163º when not ie = Dog’s Leg – 167º filled with water
32106 12 Jun 1978 @ 0845 --- research-mab 06/12/1978 Corporal Geyser 0845 ie a few inches high. It’s neighbor Dog’s Leg was draining.
32419 14 Jul 1976 @ 1720 --- research-mab July 14 1976 - inferred approx time - Dog’s Leg - - acts in sympathy with the eruptive phase of Corporal. Near the end of Corporal’s most vigorous eruptive activity Dog’s Leg is devoid of water. Immediately after the eruption ceased in Corporal Dog’s Leg filled. Dog’s Leg remained at least partially filled until Corporal again resumed its vigorous eruption some 18 minutes later.
32933 28 Sep 1972 @ 1200 --- research-mab 09/28/1972 - no time noted - Watched another exciting eruption of Corporal. I’ll only add that while pool is draining, the “Dogleg” makes a gurgling sound.
32927 07 Sep 1972 @ 1200 --- research-mab 09/07/1972 - no time noted - ...many of the features in the Back Basin (ie Mud, Mystic, Yellow Funnel and Dishwater springs, corporal geyser & Dog Leg) are still low, turbulent and muddy.
32916 31 Aug 1972 @ 1949 --- research-mab 08/31/1972 - At 7:49 PM Corporal Geyser had bubbling activity & overflowed for approximately 1 minute while at this time the Dog’s Leg was completely dry. The bubbling in Corporal stopped, its water level quickly dropped 4-4½ inches & the Dog’s Leg had refilled by 7:51 with the water level pulsating 1 inch.
32917 31 Aug 1972 @ 1949 --- research-mab 08/31/1972 - At 7:49 PM Corporal Geyser had bubbling activity & overflowed for approximately 1 minute while at this time the Dog’s Leg was completely dry. The bubbling in Corporal stopped, its water level quickly dropped 4-4½ inches & the Dog’s Leg had refilled by 7:51 with the water level pulsating 1 inch.
33208 16 May 1972 @ 1201 --- research-mab Corporal Geyser 1972 – May 16 - no time - 153F “Dog Leg” 188F Bubbling action from the Dog Leg, no action in the main spring. Most of the water coming up from the Dog Leg is going back down in the main spring, very little over flow.
32888 16 May 1972 @ 1200 --- research-mab 05/16/1972 - no time noted - Corporal Geyser – Pool= 153º Spring 188 much sulfur coming out of spring and being deposited {dog leg}
32954 12 Sep 1971 @ 1500 --- research-mab 09/12/1971- {afternoon temps 2-4pm} - Corporal 147° receives more H2O from Dog’s Leg than it gives
33214 17 Aug 1969 @ 1200 --- research-mab Aug 17 1969 - no time - No activity from the “dog leg” crater to the east last or this year
No attachments for this geyser.
Baseline does not exist.