Last Known Eruption
13h 40m ago

Latest Eruptions

Eruption DurationInterval
25 Oct 2021 @ 125823h 35m
24 Oct 2021 @ 1322:308m 41s 20m
24 Oct 2021 @ 1302 ie>6m 30s 6d 20h 23m
17 Oct 2021 @ 1639 ns12d 3h 42m
05 Oct 2021 @ 1256:2916m 42s
05 Oct 2021 @ 1239:4713m 1s 16m 19s
05 Oct 2021 @ 1223:2813m 3s 6m
05 Oct 2021 @ 1217 ie3h 18m
05 Oct 2021 @ 0859 ns2d 22h 18m
02 Oct 2021 @ 1041 ie4d 19h 57m
27 Sep 2021 @ 1444 ie1d 4h 53m
26 Sep 2021 @ 0951 ie2d 15h 20m
23 Sep 2021 @ 1831 ie7d 7h 1m
16 Sep 2021 @ 1130 ie2h 27m
16 Sep 2021 @ 0903 ie2d 17h 56m
13 Sep 2021 @ 15074h 29m
13 Sep 2021 @ 1038 ie2d 2h 27m
11 Sep 2021 @ 0811 ie43m
11 Sep 2021 @ 0728 ie2d 19h 9m
08 Sep 2021 @ 121915m
08 Sep 2021 @ 120417m
08 Sep 2021 @ 11476m 15m
08 Sep 2021 @ 113215m
08 Sep 2021 @ 11176m 15m
08 Sep 2021 @ 110216m
08 Sep 2021 @ 104616m
08 Sep 2021 @ 103015m
08 Sep 2021 @ 101516h 50m
07 Sep 2021 @ 1725 ie13d 4h 6m
25 Aug 2021 @ 1319 ns27d 18h 58m
28 Jul 2021 @ 182124d 2h 26m
04 Jul 2021 @ 1555 ie13d 1h 42m
21 Jun 2021 @ 141319m
21 Jun 2021 @ 135416m
21 Jun 2021 @ 133816m
21 Jun 2021 @ 1322 ie3d 23h 54m
17 Jun 2021 @ 1328 ie1h 13m
17 Jun 2021 @ 121520m
17 Jun 2021 @ 115514m
17 Jun 2021 @ 1141 ie19h 3m
16 Jun 2021 @ 1638 ns2h 53m
16 Jun 2021 @ 1345 ie1h 58m
16 Jun 2021 @ 114717m
16 Jun 2021 @ 1130 ns22h 16m
15 Jun 2021 @ 1314 ie2d 20h 4m
12 Jun 2021 @ 171013m 12s 16m
12 Jun 2021 @ 1654 ie8m 16m
12 Jun 2021 @ 1638 ie1d 18m
11 Jun 2021 @ 1620 ie2d 4h 34m
09 Jun 2021 @ 1146 ie1d 19h 6m
07 Jun 2021 @ 1640 ie3d 5h 54m
04 Jun 2021 @ 10469d 21h 36m
25 May 2021 @ 131013m 20m
25 May 2021 @ 125012m 7s 13m
25 May 2021 @ 1237 ie6d 18h 22m
18 May 2021 @ 1815 ie~5m 22h 0m
17 May 2021 @ 2015 ns11h 25m
17 May 2021 @ 0850 ie1d 16h 58m
15 May 2021 @ 1552 ns1d 1h 59m
14 May 2021 @ 1353 ie3d 2h 1m
11 May 2021 @ 11521d 22h 56m
09 May 2021 @ 1256 ie2d 17h 6m
06 May 2021 @ 1950 ns10h 19m
06 May 2021 @ 0931 ie15d 18h 9m
20 Apr 2021 @ 15229m 16m
20 Apr 2021 @ 1506 ie173d 5h 23m
29 Oct 2020 @ 0943 ie22d 20h 31m
06 Oct 2020 @ 1312 ie11d 2h 27m
25 Sep 2020 @ 1045 ie9d 18h 14m
15 Sep 2020 @ 163112m 26s 17m
15 Sep 2020 @ 16148m 2s 16m
15 Sep 2020 @ 1558 ie3h 2m
15 Sep 2020 @ 125611m 57s 18m
15 Sep 2020 @ 12389m 10s 22m
15 Sep 2020 @ 121610m 43s 16m
15 Sep 2020 @ 12007m 21s 22h 19m
14 Sep 2020 @ 1341 ie2h 33m
14 Sep 2020 @ 1108 ie1d 22h 12m
12 Sep 2020 @ 12562d 22h 13m
09 Sep 2020 @ 1443 ie20h 31m
08 Sep 2020 @ 1812 ie2d 4h 37m
06 Sep 2020 @ 1335 ie15m
06 Sep 2020 @ 13205m 55s 18m
06 Sep 2020 @ 13025m 32s 1h 57m
06 Sep 2020 @ 1105 ie12d 2h 39m
25 Aug 2020 @ 0826 ie17h 15m
24 Aug 2020 @ 151115m
24 Aug 2020 @ 145621m
24 Aug 2020 @ 143522m
24 Aug 2020 @ 141316m
24 Aug 2020 @ 135716m
24 Aug 2020 @ 134118m
24 Aug 2020 @ 1323 ie1h 39m
24 Aug 2020 @ 114418m
24 Aug 2020 @ 112620m
24 Aug 2020 @ 110620m
24 Aug 2020 @ 104610m 21s 13m
24 Aug 2020 @ 1033 ie5d 17h 30m
18 Aug 2020 @ 1703 ie3d 21h 28m
14 Aug 2020 @ 1935 ie1d 8h 21m

Interval Statistics

Interval Count100
Min6m
Max173d 5h 23m
Mean4d 9h 8m
Median3h 53m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.
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.
7593 05 Feb 1989 @ 0000 05 Feb 1989 @ 2359 JSJ Corporal Geyser full, clear, overflowing.
7600 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Corporal Geyser is now serving only as a receptacle for the Dog’s Leg.
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.
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.
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.
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.
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}
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.
7320 24 Aug 1967 @ 1800 --- research-mab 08/24/1967 Corporal erupts frequently – perhaps 2 or 3 times an hour.
6648 29 Jun 1964 @ 0735 --- research-mab 06/29/1964 Corporal – Placed marker at 7:35a Trail was very wet.
EntrySourceLinkComment
18 May 2021 @ 1815 ell-e https://imgur.com/QscOoxd A still image showing the water boiling from below.
21 May 2015 @ 1130 JSJ https://www.youtube.com/watch?v=ZTbLqppomoI Video compilation of Corporal Geyser's eruptions in the latest morning & earliest afternoon of 21 May 2015.
Baseline does not exist.