| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 38272 |
23 Feb 2025 @ 1445 |
--- |
K.Cooper |
a few inches below overflow. clearly active |
| 37257 |
29 Sep 2024 @ 1002 |
--- |
TSBryan |
quiet with damp runoff channel |
| 33912 |
24 Jan 2024 @ 1405 |
--- |
JR |
Low, dogleg full. Water looked dirty. No bubbles. |
| 26670 |
25 Jun 2023 @ 1456 |
--- |
steve |
No activity the few minutes I watched it. |
| 25057 |
27 Feb 2023 @ 1528 |
--- |
MAB |
approx time - seen IE from Rubble earlier too - no apparent runoff - Dog Leg full with visible burbles from the vents near ground level - did not stay to watch if DL dropped |
| 21817 |
07 Jun 2022 @ 1100 |
--- |
novakg |
Pool was filling and very near to full. |
| 21791 |
06 Jun 2022 @ 1114 |
--- |
novakg |
Filling. |
| 20329 |
06 Nov 2021 @ 1205 |
--- |
MAB |
just ended - no bubbles but DL still empty |
| 16968 |
30 Apr 2021 @ 1939 |
--- |
MAB |
Resting water level lower than last visit - Dog Leg too |
| 16299 |
28 Sep 2020 @ 1424 |
--- |
bbev |
low water level, lime green in color. |
| 14673 |
18 Jun 2020 @ 1837 |
--- |
jkgood |
Down 3-4 inches, calm |
| 11317 |
22 May 2019 @ 0703 |
--- |
Kyle |
nearly full but below over flow. steady boiling and bubbles |
| 11328 |
21 May 2019 @ 0908 |
--- |
Kyle |
low pool, quiet |
| 11331 |
20 May 2019 @ 0821 |
--- |
Kyle |
low pool, quiet |
| 10352 |
16 Sep 2018 @ 1109 |
16 Sep 2018 @ 1111 |
Siegmund |
Gas bubbles and good thumps at 1109. Steam flashes at bottom of pool 1111. Water ~3cm below overflow. |
| 9710 |
13 Aug 2018 @ 1118 |
--- |
Kent |
Pool six inches below overflow and only minor steam |
| 19282 |
05 Jul 2018 @ 1201 |
--- |
research-mab |
7-5-2018 CORPORAL BBEV 1201 See Note under Steamboat
Porcelain Basin still very active, but appears drier. Congress pool down 4-6" from yesterday, still boiling vigorously. Emerald Springs and Monarch runoff appears to have increased. Monarch geyser crater has clearer water and much fuller. Corperal boiling, runoff wet. Cistern did not look any different, boiling steadily, just at overflow. Emerald Springs is still cloudy but with noticeably less boiling.
https://geysertimes.org/note.php?id=9039 |
| 8848 |
22 Jun 2018 @ 1645 |
22 Jun 2018 @ 1735 |
MAB |
Two eruptions in this time frame - Starts are different – more convection and upwelling before it starts as it used to, or if that is the start it is very very different, so I don’t have good start times yet until I figure it out! Water level is low, but it does reach overflow during the eruption, about 10 feet out. Superb growling and grumbling from Dog Leg! |
| 8884 |
21 Jun 2018 @ 0915 |
--- |
Polly |
Bubbling in the back of the pool. |
| 8562 |
03 Jun 2018 @ 1520 |
--- |
Siegmund |
Pool down ~15cm, runoff channel dry. |
| 8561 |
03 Jun 2018 @ 1156 |
--- |
Siegmund |
Pool down ~10cm, but runoff channel wet. |
| 29617 |
01 Aug 2017 @ 1200 |
--- |
research-mab |
8/01/2017 - no time noted - Corporal and Veteran’s color now murky |
| 29600 |
22 Sep 2016 @ 1100 |
--- |
research-mab |
9/22/2016 Corporal Geyser is very clear today 11am |
| 2595 |
31 Oct 2015 @ 2058 |
--- |
MAB |
Corporal and Dog Leg water levels are back to predisturbance levels, after going way way up, then followed by very very low for weeks. I did not get a full cycle to check intervals and durations because Vixen was vexing. |
| 29861 |
17 Sep 2001 @ 1200 |
--- |
research-mab |
9/17/01 - no times noted - For the last two days Corporal G. has been murky and off-color + Dog Leg G has been very active. |
| 30023 |
19 Jun 1996 @ 1200 |
--- |
research-mab |
6/19/1996 - no time noted - Dog Leg is very low but Corporal and Veteran seem about normal. |
| 30154 |
28 Jun 1994 @ 1200 |
--- |
research-mab |
6/28/1994 - no time noted - I spent a lot of rove time watching Corporal Geyser and Dog’s Leg. They have seemed to switch roles and now Corporal is erupting and Dog’s Leg is not. Corporal has low boils or eruptions lasting between 10-13 min with intervals between eruptions about 10-12 min. When Corporal starts bubbling Dog’s Leg drains and when Corporal stops, Dog’s Leg quickly fills. I took temp readings and Corporals fluxuates between a low of 69.6° to a high of 79.4°! Low occurred when two (of the seemingly three) vents were going and high occurred during time when all three vents were boiling, about two min. from end of eruption. Dogs’ Leg temp ranged from 71.5°C to about 73.4°C. Remember these are estimates I only watched it for a few separate accounts today! But I’m hooked so more soon |
| 30296 |
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. |
| 30279 |
24 Aug 1993 @ 1200 |
--- |
research-mab |
8/24/1993 - no times noted - Other signs of disturbance (albeit mild} - Corporal 162°F water level down, water yellowish, dark deposit on sides of pool - bubbling overflowing.- Dog Leg – 160°F, dry around vent no overflow |
| 30265 |
22 Aug 1993 @ 1200 |
--- |
research-mab |
8-22/1993 - no time noted - Corporal geyser is muddy + water is overflowing into the runoff channel. |
| 30464 |
07 Sep 1992 @ 1624 |
--- |
research-mab |
9/7/92 1624 Corporal bubbling -- Dog Leg draining – was ~ ½ full when arrived w/in 1 min was drained completely |
| 30518 |
09 Jun 1991 @ 1200 |
--- |
research-mab |
6/9/1991 - no time noted - Corporal’s overflow was wet. Dog Leg almost full. |
| 30503 |
16 May 1991 @ 1200 |
--- |
research-mab |
5/16/1991 - no time noted - Corporal – temp 159 pH 5 Clear green. |
| 30641 |
05 Jul 1990 @ 1439 |
--- |
research-mab |
7/5/1990 Corporal erupting in gentle overflow at 1439 – Dog’s Leg drained. Veteran Sputtering. |
| 30638 |
29 Jun 1990 @ 1420 |
--- |
research-mab |
6/29/90 - at 1420 as I walked thru Back Basin Dog’s Leg was drained. Corporal had overflowed. Minute Geyser was not erupting. Veteran was making a lot of noise but not erupting. |
| 30722 |
28 Jul 1989 @ 1200 |
--- |
research-mab |
7/28/1989 - no time noted - Corporal Geyser 176ºF slight overflow, bubbling, water is clear -
Dog’s Leg – drained, water level visible ~ 1½ ft down |
| 30711 |
09 Jul 1989 @ 1200 |
--- |
research-mab |
7/9/1989 - no time noted - Corporal Geyser overflowing. Dog’s Leg drained |
| 30694 |
16 Jun 1989 @ 1300 |
--- |
research-mab |
June 16 1989 - Dog’s Leg was drained at about 1300 hr and Corporal Geyser was beginning to overflow. |
| 7593 |
05 Feb 1989 @ 0000 |
05 Feb 1989 @ 2359 |
JSJ |
Corporal Geyser full, clear, overflowing. |
| 30891 |
24 Aug 1987 @ 1200 |
--- |
research-mab |
8/24/1987 - no time noted - Corporal Geyser is a greenish milky color. It is bubbling on the north side (side away from dog’s leg) |
| 30885 |
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 |
| 30880 |
04 Aug 1987 @ 1200 |
--- |
research-mab |
Aug 4 (1987) - no time noted - Dog Leg & Corporal Geyser are quiet. |
| 30869 |
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. |
| 33456 |
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! |
| 30939 |
03 Jul 1985 @ 1200 |
--- |
research-mab |
July 3 1985 – no time noted - Dog Leg 197ºF boiling continuously & overflowing into Corporal
Corporal Geyser – 146ºF also overflowing loaded with rocks near the vent and also some along the rim. Removed as many as possible – still many large rocks near the vent. - Trail is wet along & below Corporal runoff |
| 30971 |
29 May 1984 @ 1200 |
--- |
research-mab |
Tuesday May 29, 1984 - no time noted - Corporal and Dog’s Leg are perfectly clear and calm today. |
| 7600 |
11 Feb 1984 @ 1800 |
--- |
research-mab |
02/11/1984 Corporal Geyser is now serving only as a receptacle for the Dog’s Leg. |
| 31114 |
26 Jun 1983 @ 1200 |
--- |
research-mab |
June 26, - no time noted - Corporal geyser has noticeable run off! Eruption? |
| 31074 |
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. |
| 31063 |
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. |
| 31038 |
08 Jan 1983 @ 1200 |
--- |
research-mab |
January 8 1983 - no time noted - Temps from Backbasinland…
Corporal Geyser 134º clear green
Dog’s Leg sulphur lined & bubbling 188º overflowing into Corporal |
| 31362 |
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 |
| 31325 |
10 Jul 1982 @ 1515 |
--- |
research-mab |
7/10/1982 Dog Leg Spring: boiling @ 1515 - Corporal: boiling @ 1515, splashing 4-6” no overflow |
| 31311 |
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. |
| 31242 |
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.) |
| 31185 |
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 |
| 31572 |
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 |
| 31493 |
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. |
| 31483 |
05 Aug 1981 @ 1735 |
--- |
research-mab |
August 5, 1981 - inferred time - During Dog’s Leg’s eruption Corporal drained, after the eruption started to bubble and slowly fill. |
| 31480 |
05 Aug 1981 @ 1200 |
--- |
research-mab |
August 5, 1981 - no time noted - Corporal Geyser dark brown turbid water w/small bubbling 164º |
| 31436 |
02 Aug 1981 @ 1200 |
--- |
research-mab |
Sunday August 2 1981 The Basin Wide Disturbance has occurred! - no time noted - Dog’s Leg – when full 168º - Corporal During eruption 164º slightly turbid water |
| 31409 |
06 Jun 1981 @ 1200 |
--- |
research-mab |
Saturday June 6 1981 - no time noted - Corporal Geyser – clear gray-blue water, while in a thumping eruption 178ºF.-
Dog’s Leg Spring- during refill 179ºF. |
| 31817 |
30 Sep 1980 @ 1200 |
--- |
research-mab |
9/30/80 - no time noted - Corporal had been overflowing now boiling gently & 2” below O |
| 31784 |
20 Sep 1980 @ 1200 |
--- |
research-mab |
Saturday September 20 1980 - no time noted - Corporal Geyser – slightly murky 161ºF before eruption 172 at vent during eruption
Dog’s Leg – filled 2/3 and bubbling 163º, following drain, then fill up 170ºF |
| 31692 |
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 |
| 31668 |
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 |
| 31649 |
12 Jun 1980 @ 1200 |
--- |
research-mab |
June 12th 1980 - no time noted - Corporal Geyser blew off steam for 4 minutes, followed by a 26 minute wait until heavy boiling again resurfaced. Dog Leg is real noisy gurgling empty when Corporal reaches its peak. |
| 31634 |
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 |
| 31958 |
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. |
| 31886 |
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 |
| 31863 |
05 Jul 1979 @ 1200 |
--- |
research-mab |
July 5 1979 - no time noted - Corporal Geyser 167ºF as it was starting an “eruption”
= Dog Leg 177ºF |
| 32216 |
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 |
| 32174 |
24 Aug 1978 @ 0000 |
--- |
research-mab |
08/24/1978 When Corporal boils it sounds like a heart beat. Who knows what is at the bottom of it? |
| 32086 |
15 Apr 1978 @ 1200 |
--- |
research-mab |
04/15/1978 - no time noted - Corporal 166° quiet, 200° eruption |
| 32056 |
25 Mar 1978 @ 1200 |
--- |
research-mab |
March 25 1978 - no time noted - Corporal & Dog’s Leg – Doin the same old thing |
| 32544 |
07 Sep 1976 @ 1200 |
--- |
research-mab |
09/07/1976 - no time noted - Corporal – 175° → 200° was 178° before eruption, progressed to 200° at the height of the eruption |
| 32418 |
14 Jul 1976 @ 1721 |
--- |
research-mab |
July 14 1976 - inferred time no time noted 2nd entry - Corporal Geyser - - has an eruptive cycle of approximately 20 minutes and 34 seconds. I began my observation of Corporal just as the pool filled and overflow began. The eruption ceased soon afterwards and I began timing. The pool drained approximately 4-5 inches. Once the pool has drained to the level of white sinter deposit the pool gradually begins to refill. Slow at first, then increasing in frequency and intensity bubbles begin to appear at the surface of the pool. As the feature approaches the end of its eruptive cycle - - bubbling becomes quite vigorous. Steam bubbles can be heard hitting cap rock in the vent before they surface. The largest eruptive display reaches a whopping 6-8”. Spectacular!!! |
| 32417 |
14 Jul 1976 @ 1720 |
--- |
research-mab |
July 14 1976 - no time noted - Thump in Back Basin. At approximately 5:20 pm I was standing by Corporal Geyser - - Two visitors who had stopped to watch Corporal and the continued on towards Vixen. About 5:30 pm we continued our discussion of Basin activity after an eruption of Veteran (c. 5:28 pm) At that time he inquired as to whether or not there was a relationship between the thump he had heard “& felt and the activity at Veteran. Inquiring further we (three) agreed that we had felt and heard a large thump. - - The man and his wife being stationed at Vixen and I at Corporal. Approximate time we agreed on was 5:20. |
| 5548 |
10 Jul 1976 @ 1800 |
--- |
research-mab |
07/10/1976 Corporal Geyser - - feature appears to be more active than normal. The wash from the feature extended beyond normal runoff channel and was evident on the trail between Veteran and the “T” in the trail by bridge at Tantalus. |
| 32338 |
17 May 1976 @ 1200 |
--- |
research-mab |
May 17 1976 - no times noted - saw the following geysers in action:African (continuous), Constant, Big whirligig, Valentine, Dark Cavern, Vixen, Corporal, (Fan?) |
| 32696 |
29 Sep 1975 @ 1200 |
--- |
research-mab |
09/29/1975 - no time noted - Corporal still overflowing periodically. |
| 5700 |
27 Sep 1975 @ 1800 |
--- |
research-mab |
09/27/1975
Corporal: the usual overflow activity (periodic with draining level of pool down ~ 6”) which has not been apparent in the last two weeks, was noticed happening today. Timed sequence: 22 min interval between one drain period and another – 15 ½ min after it started to drain, it started to fill, overflow lasted ~ 1 min, draining : ~1 min, filling about 5 min. |
| 5696 |
01 Sep 1975 @ 1150 |
--- |
research-mab |
09/01/1975
Corporal filled at 1150- intense boiling. No reaction in either Veteran or Rubble. |
| 5697 |
01 Sep 1975 @ 1032 |
--- |
research-mab |
09/01/1975 Corporal was checked during eruption of Rubble. No significant change in Corporal. |
| 32679 |
27 Aug 1975 @ 1200 |
--- |
research-mab |
08/27/1975 - no time noted - Corporal geyser bubbling away but not erupting, generating no runoff. |
| 32669 |
24 Aug 1975 @ 1200 |
--- |
research-mab |
08/24/1975 - no times noted - Corporal has been bubbling strongly every time I’ve past it in the last 3 days. (Ditto SSL) |
| 5611 |
05 Aug 1975 @ 1800 |
--- |
research-mab |
08/05/1975 Corporal behaving strangely. Was bubbling away when pool was quite low, evidence indicated no recent eruption. |
| 32633 |
15 Jul 1975 @ 1200 |
--- |
research-mab |
Thurs July 15 1975- no time noted - Corporal geyser – water slowly clearing, “eruptions” continuing much as before quake. |
| 32623 |
07 Jul 1975 @ 1200 |
--- |
research-mab |
7/7/1975 - no time noted - Corporal – clearing, same activity as before quake |
| 32803 |
08 Sep 1973 @ 1600 |
08 Sep 1973 @ 1605 |
research-mab |
09/08/1973 - Corporal 180º filling and with heavy bubbling 4:00pm -
Corporal 170º water level dropped no heavy bubbling 4:05pm |
| 5998 |
12 May 1973 @ 1800 |
--- |
research-mab |
05/12/1973 Each eruption of Veteran was followed by bubbling and runoff of Corporal. Dog’s Leg water level dropped a ft. as Corporal filled & overflowed – then filled up as overflow of Corporal ceased. |
| 32932 |
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. |
| 6468 |
23 Sep 1972 @ 1800 |
--- |
research-mab |
09/23/1972
For several days I’ve noticed that Corporal Geyser was having greater than usual run-off at times, however every time I went by Corporal it would be 3”-4” below the edge. Today I witnessed the “eruption”. The pool started to fill and bubble until it rose to overflowing. The bubbling action was relatively gentle. Approx 20 gal of water ran down the run-off channel, the bubbling stopped, and the level dropped. A dull thumping was apparent during the bubbling activity. {no specific time} |
| 32926 |
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. |
| 6422 |
25 Aug 1972 @ 1800 |
--- |
research-mab |
08/25/1972
Corporal Geyser – the heat has shifted to here – apparently from “The Dog’s Leg.” There is bubbling in pool of Corporal, the water in it is turbid, & there is now no runoff from The Dog’s Leg. In addition, The Dog’s Leg has lost most of its Sulphur deposit. |
| 33207 |
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. |
| 32887 |
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} |
| 32968 |
02 Oct 1971 @ 1200 |
--- |
research-mab |
10/02/1971 - no time noted - Corporal Geyser – water down 2 ½ inches |
| 32953 |
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 |
| 32981 |
28 Aug 1969 @ 1100 |
--- |
research-mab |
August 28 1969 Thursday -{approx time} - Don White and I were in Back Basin taking thermal readings – 9 to noon.
Green Dragon – 4 feet – 206.5 F
Phillips Cauldron – 5 feet – 203.5 F
Yellow Funnel – 8½ ft. - 202.0 F
Pearl – 4 ft – 83 to 92 C
Corporal – 4 ft – 91 C
Cistern – 26 ft – 216.2 F
Echinus – 10 ft. - 102.5 C |