Last Known Eruption
1d 13h 46m ago

Latest Eruptions

Eruption DurationInterval
14 May 2021 @ 163524m
14 May 2021 @ 16119s 41m
14 May 2021 @ 153021m
14 May 2021 @ 15091d 21h 39m
12 May 2021 @ 173045m
12 May 2021 @ 164542m
12 May 2021 @ 160337m
12 May 2021 @ 152621m
12 May 2021 @ 150518m
12 May 2021 @ 14471h 41m
12 May 2021 @ 13061h 7m
12 May 2021 @ 115925m
12 May 2021 @ 113447m
12 May 2021 @ 1046:1837m 40s
12 May 2021 @ 1008:3823h 32m
11 May 2021 @ 10361d 21h 10m
09 May 2021 @ 132618s 8d 23h 22m
30 Apr 2021 @ 140428m
30 Apr 2021 @ 133627m
30 Apr 2021 @ 130922h 7m
29 Apr 2021 @ 150232m
29 Apr 2021 @ 143028m
29 Apr 2021 @ 140221m
29 Apr 2021 @ 134118m
29 Apr 2021 @ 132318h 53m
28 Apr 2021 @ 183029m
28 Apr 2021 @ 180130m
28 Apr 2021 @ 173131m
28 Apr 2021 @ 170031m
28 Apr 2021 @ 162927m
28 Apr 2021 @ 160229m
28 Apr 2021 @ 153328m
28 Apr 2021 @ 150535m
28 Apr 2021 @ 143023m
28 Apr 2021 @ 140718m
28 Apr 2021 @ 134921m
28 Apr 2021 @ 132824m
28 Apr 2021 @ 130433m
28 Apr 2021 @ 123127m
28 Apr 2021 @ 120424m
28 Apr 2021 @ 114038m
28 Apr 2021 @ 110227m
28 Apr 2021 @ 103524m
28 Apr 2021 @ 101121m
28 Apr 2021 @ 09501d 21h 13m
26 Apr 2021 @ 123728m
26 Apr 2021 @ 120940m
26 Apr 2021 @ 112918d 20h 14m
07 Apr 2021 @ 15153h 10m
07 Apr 2021 @ 120587d 18h 31m
09 Jan 2021 @ 16345m
09 Jan 2021 @ 16295d 1h 21m
04 Jan 2021 @ 150819d 1h 36m
16 Dec 2020 @ 133246d 23h 55m
30 Oct 2020 @ 143715d 1h 38m
15 Oct 2020 @ 12593d 2h 57m
12 Oct 2020 @ 100218h 57m
11 Oct 2020 @ 15051d 36m
10 Oct 2020 @ 14291h 6m
10 Oct 2020 @ 13233d 21h 51m
06 Oct 2020 @ 153258m
06 Oct 2020 @ 14349s 56m
06 Oct 2020 @ 13383d 20h 32m
02 Oct 2020 @ 17061h 28m
02 Oct 2020 @ 15383d 22h 45m
28 Sep 2020 @ 16532d 1h 20m
26 Sep 2020 @ 15338s 55m
26 Sep 2020 @ 14388s 1d 22m
25 Sep 2020 @ 14161d 20h 13m
23 Sep 2020 @ 18032d 1h 58m
21 Sep 2020 @ 160523h 2m
20 Sep 2020 @ 170358m
20 Sep 2020 @ 160552m
20 Sep 2020 @ 15138s 2d 2h 48m
18 Sep 2020 @ 122527m
18 Sep 2020 @ 115851m
18 Sep 2020 @ 110723m
18 Sep 2020 @ 10442d 21h 20m
15 Sep 2020 @ 13241d 35m
14 Sep 2020 @ 124952m
14 Sep 2020 @ 11577d 21h 12m
06 Sep 2020 @ 144534m
06 Sep 2020 @ 141140m
06 Sep 2020 @ 13311h 14m
06 Sep 2020 @ 121741m
06 Sep 2020 @ 113634m
06 Sep 2020 @ 11026d 18h 10m
30 Aug 2020 @ 16521h 2m
30 Aug 2020 @ 15501d 5h 3m
29 Aug 2020 @ 10476d 17h 36m
22 Aug 2020 @ 17114s 29m
22 Aug 2020 @ 16424d 21h 52m
17 Aug 2020 @ 185040m
17 Aug 2020 @ 181039m
17 Aug 2020 @ 17314d 5h 25m
13 Aug 2020 @ 12068s 2d 21h 28m
10 Aug 2020 @ 143832m
10 Aug 2020 @ 14063d 4h 11m
07 Aug 2020 @ 09555d 23h 47m
01 Aug 2020 @ 10080:1231m

Interval Statistics

Interval Count100
Min5m
Max87d 18h 31m
Mean2d 20h 42m
Median49m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
17091 14 May 2021 @ 1452 --- cb another push but pool dropped when Whirligig started to play.
17092 14 May 2021 @ 1425 14 May 2021 @ 1431 cb push with no eruption. 1435 pool dropped to expose its edges
17066 12 May 2021 @ 1730 --- MAB When Constant tries and fails it's hard to pin down the missed start time as roiling and waves begin 2 min before actual eruption fyi if the maths seem off. The 2 longer intervals later in the day did not include pushes- 2 of us were watching
17018 09 May 2021 @ 1412 09 May 2021 @ 1419 cb pool pushed with great overflow and nice 5" blooping/roiling boil. Sure looked like it would erupt but the pool crashed @ 1419.
17020 09 May 2021 @ 1334 09 May 2021 @ 1357 cb pool came up, the vent boiled up for ~8 minutes, good overflow down the runoff channel. We thought we would get another eruption but the pool crashed at 1356. During this period Whirligig side and shore vents briefly played twice.
17012 08 May 2021 @ 1515 08 May 2021 @ 1630 cb pool was high and was overflowing with blips over the vent. It blipped and blurped but never erupted. Pool dramatically dropped at 1534. refilling @ 1559. overflowing @ 1603 with 5" blips, 1607 pool dropping. 1608 pool crashed. 1620ish pool filling, 1630 pool overflowing with blips when I left.
16944 28 Apr 2021 @ 0936 28 Apr 2021 @ 1236 MAB Pool level is low - no outwash down the 'ramp' until just prior to eruptions or sometimes not til the eruption itself
16136 14 Sep 2020 @ 1223 --- Graham Splashes but no eruption.
16135 14 Sep 2020 @ 1130 --- Graham Push but no eruption.
15034 18 Jul 2020 @ 1017 --- Mkeller Waves and roiling but no eruption
15032 18 Jul 2020 @ 0917 --- Mkeller Waves and roiling but no eruption
15033 18 Jul 2020 @ 0843 --- Mkeller Waves and roiling but no eruption
15031 18 Jul 2020 @ 0811 --- Mkeller Waves and roiling but no eruption
15030 18 Jul 2020 @ 0659 --- Mkeller Waves and roiling but no eruption
15029 18 Jul 2020 @ 0619 --- Mkeller Waves and roiling but no eruption
14973 13 Jul 2020 @ 1504 --- nails Boiled up, no eruption
14972 13 Jul 2020 @ 1430 --- nails Boiled up, no eruption
14776 29 Jun 2020 @ 0900 29 Jun 2020 @ 1023 Graham fluctuating up and down. Splashed at 0947.
14760 28 Jun 2020 @ 1054 --- Mkeller Waves and roiling but no eruption
14759 28 Jun 2020 @ 0948 --- Mkeller Waves and roiling but no eruption
14758 28 Jun 2020 @ 0805 --- Mkeller Waves and roiling but no eruption
13795 24 Sep 2019 @ 1607 --- DanS Domed.
13794 24 Sep 2019 @ 1546 --- DanS Domed.
13792 24 Sep 2019 @ 1525 --- DanS Bubbling. No eruption.
13791 24 Sep 2019 @ 1505 --- DanS Domed but didn’t erupt
13705 15 Sep 2019 @ 1216 --- Skookum Push, no eruption. 4min boil before subsiding.
13247 14 Aug 2019 @ 1508 14 Aug 2019 @ 1513 cb push but did not erupt
13246 14 Aug 2019 @ 1448 14 Aug 2019 @ 1454 cb push but no eruption
13245 14 Aug 2019 @ 1427 14 Aug 2019 @ 1433 cb push but no eruption
13244 14 Aug 2019 @ 1408 14 Aug 2019 @ 1412 cb push but no eruption
12793 25 Jul 2019 @ 0950 25 Jul 2019 @ 1250 cb Attempts to erupt but fails. Nice boil that looks like it will erupt, stays boiling for 4+m, then stops and pool falls below overflow. Constants pool is being filled by 5 small erupters that seem to run along a line to the north east (up toward the Graceful area) Attempts @ 1007, 1025, 1042, 1058, 1116 made 2 good attempts at erupting but again failed, 1133, 1150, 1210 erupted! 1225, 1243.
11765 13 Jun 2019 @ 0840 13 Jun 2019 @ 1005 CrisG no eruptions during this period. very steamy morning, so difficult to see pool. Arrived to a full pool. I did not notice any pool crashes based on rock coverage, but unable to see convection/bubbling until right before eruption.
11768 12 Jun 2019 @ 1130 12 Jun 2019 @ 1242 CrisG No eruptions during this time (3rd burst of previous eruption was at 1230). Left for Steamboat!
11070 24 Apr 2019 @ 1340 24 Apr 2019 @ 1425 DanS Tried to erupt about 1340, 1400, 1425. Wind and hail aborted.
8265 22 May 2018 @ 1225 22 May 2018 @ 1233 cb another boil with convection waves but failed to erupt
8263 22 May 2018 @ 1154 22 May 2018 @ 1200 cb small boil to about 3 inches. put out nice convection waves but did not erupt
8173 12 May 2018 @ 1024 12 May 2018 @ 1535 srboom Pool would fill and try to erupt about every twenty minutes for the entirety of the time I was there, but no eruptions were observed. The try at 1327 looked really promising, but no go. There appears to be a fair amount of water flowing in from another source.
8097 07 May 2018 @ 1047 07 May 2018 @ 1436 cb Did not erupt while I was there. It did have 2 nice boils that each lasted for 6 minutes and were 90 minutes apart.
7772 25 Oct 2017 @ 1308 --- DanS Another aborted eruption with only water doming.
7771 25 Oct 2017 @ 1228 --- DanS Tried to erupt, but aborted. Windy!
7774 29 Sep 2017 @ 1601 29 Sep 2017 @ 1639 Tara Pushes at 1601, 1614, 1627, and 1639.
7773 29 Sep 2017 @ 1322 29 Sep 2017 @ 1345 Tara Pushes at 1322, 1333, and 1345.
5894 07 Sep 2017 @ 1805 --- Graham Tried and failed
5895 07 Sep 2017 @ 1703 --- Graham Tried and failed. Would have been a trio with Fireball and Arsenic.
5896 07 Sep 2017 @ 1629 --- Graham Tried and failed.
5897 07 Sep 2017 @ 1602 --- Graham Tried and failed. Would have been a trio with Whirligig and Fireball.
5898 07 Sep 2017 @ 1529 --- Graham Tried and failed
5899 07 Sep 2017 @ 1234 --- Graham Tried and failed
5900 07 Sep 2017 @ 1208 --- Graham Tried but failed
5901 07 Sep 2017 @ 1137 --- Graham Tried but failed
5902 07 Sep 2017 @ 1111 --- Graham Tried and failed.
5903 07 Sep 2017 @ 1037 --- Graham Tried but failed.
5871 05 Sep 2017 @ 1409 --- Pat Snyder push and fail. 20 min push
5872 05 Sep 2017 @ 1346 --- Pat Snyder Push no eruption.
5873 05 Sep 2017 @ 1315 --- Pat Snyder push no eruption
5874 05 Sep 2017 @ 1247 --- Pat Snyder push no eruption
5875 05 Sep 2017 @ 1209 --- Pat Snyder push no eruption
5876 05 Sep 2017 @ 1140 --- Pat Snyder Fill bt no eruption
5785 04 Sep 2017 @ 1707 --- Graham Tried and failed
5786 04 Sep 2017 @ 1531 --- Graham Tried and failed
5787 04 Sep 2017 @ 1422 --- Graham Tried but failed
5788 04 Sep 2017 @ 1310 --- Graham Tried but failed.
5077 19 Aug 2017 @ 1546 --- CrisG Decent fill (best I've seen so far today) with bubbling, but no eruption and pool fell.
4937 17 Aug 2017 @ 1415 17 Aug 2017 @ 1924 nails No eruptions observed during this time period. Would heat up and bubble for about 4 to 5 minutes, then crash at about 20 minutes intervals. Boiled at 1434, 1500, 1522, 1545, 1609, 1635, 1657, 1722, 1743, 1808, 1832, 1858, 1924.
4400 03 Jul 2017 @ 1342 --- Graham Tried to erupt.
4401 03 Jul 2017 @ 1323 --- Graham Tried to erupt.
4402 03 Jul 2017 @ 1246 --- Graham Tried to erupt but failed.
4326 16 Jun 2017 @ 1244 --- CrisG pool looked good, nice bubbling. Then pool crashed.
4273 08 Jun 2017 @ 1038 --- CrisG lots of good waves, convection, and bubbling. Looked REALLY good but no eruption.
4274 08 Jun 2017 @ 1017 --- CrisG much better waves and great preplay. looked very good for eruption but never developed and pool dropped.
4275 08 Jun 2017 @ 0954 --- CrisG decent waves and preplay, but pool dropped. no eruption.
4269 07 Jun 2017 @ 1328 --- novakg Push. No eruption.
4233 06 Jun 2017 @ 1604 --- JSJ Constant Geyser tried to erupt at 1604 + ~10s, but it crashed - no eruption.
4234 06 Jun 2017 @ 1520 --- JSJ Constant Geyser crashed at 1520-ish. It had preplay roiling, but no eruption.
4170 31 May 2017 @ 1600 --- kc came back later in afternoon and stayed about 3 hours. all Constants were failed eruptions.
4152 29 May 2017 @ 1220 --- srboom Almost erupted, not quite there
4151 29 May 2017 @ 1012 --- srboom Tried to erupt, good high blurbles
4068 06 May 2017 @ 1031 06 May 2017 @ 1547 srboom Constant is on its 20 minute cycles, with no actual eruptions. The morning/early afternoon had small splurts with a couple blurbles, later in the afternoon (1407 on) it turned to fairly steady 6-8 in. blurbles.
3871 06 Nov 2016 @ 1314 06 Nov 2016 @ 1508 srboom pool filled and drained, with attempts at eruptions about every 20 minutes. big blurble at 14:26, but no eruption.
3823 27 Oct 2016 @ 1345 27 Oct 2016 @ 1555 DanS No eruptions 2+ hours; when pool is full, has bubbles surfacing over vent, but unable to start full eruption. Very windy, with estimated sustained winds at 25 mph and gusts higher.
3804 23 Oct 2016 @ 1314 --- DanS Trying to erupt, with full pool bubbles and small bursts from 1314 - 1320
3667 15 Sep 2016 @ 1036 --- CrisG Good convection and waves. Good push but no eruption. Cool and breezy morning.
3668 15 Sep 2016 @ 0956 --- CrisG Over the course of 2 minutes, had good convection and waves, made 2 pushes with small blurps before pool dropped.No eruption.
3641 10 Sep 2016 @ 1538 --- novakg Push with small boiling. No eruption.
3604 05 Sep 2016 @ 0953 --- novakg Push, no eruption. Rainy and cold.
3605 05 Sep 2016 @ 0920 --- novakg Push, no eruption. Cold and rainy.
3066 14 Jun 2016 @ 1450 --- CrisG Good water level and made 2 pushes but no eruption. Pool fell after second push.
2856 19 May 2016 @ 0955 19 May 2016 @ 0957 MAB Serious boiling for 2 minutes with no eruption, continuing as pool lowered and you could tell it was a No-Go. Way bigger activity than the usually observed "push with no eruption".
2606 01 Nov 2015 @ 0930 01 Nov 2015 @ 1320 MAB Regular cycles with no eruption, 0938 1007 1039 1112 1310. No other eruptions or attempts seen.
2593 31 Oct 2015 @ 1010 --- MAB good try, good push, but no eruption 1010
1501 13 Jan 2015 @ 1600 --- MAB Inactive- the runoff 'shelf' where we watch first overflow when Constant refills prior to a normal eruption is green.
1486 02 Nov 2014 @ 0000 02 Nov 2014 @ 2359 MAB Both Constant and Whirligig have lots of water coming into them from above, since late Sept. Both were looking a little 'colloidal blue' in the centers of their craters. I wish I had another few weeks to watch what happens.
1462 21 Oct 2014 @ 1240 21 Oct 2014 @ 1717 MAB Cycles with no eruptions at regular intervals 1240-1400, and 1514-1717
1429 30 Sep 2014 @ 1200 30 Sep 2014 @ 1800 MAB Regular cycles from 15-20 minutes with overflow, pushes or attempts at bursts less than 12", but no airborne eruptions seen. Observed 3+ hours in the morning, and separate 1 hour visits in the afternoon with no eruptions.  
1047 20 Apr 2014 @ 0000 20 Apr 2014 @ 2359 MAB Opening Weekend saw no eruptions of Constant Geyser.  It cycles as it has in the past at regular intervals (less than 20 min) but does not erupt.  Per the YVO graphs this change occurred on April 8, 2014.  I did not know how to interpret the drastic change in the shape of the YVO graph until I was able to observe the cycles in person.  Some of them look quite promising with good blurps and overflow, but no eruptions were seen during the time it was observed.
879 29 Sep 2013 @ 0000 29 Sep 2013 @ 2359 MAB Constant was cycling as usual today at about 19 minutes. The winds were nasty both there and at Vixen, I did not see a full eruption of Constant, but the cycles are holding. 3 pushes with no eruption, exit, return and one push, then I left.
373 31 Jul 2012 @ 1735 31 Jul 2012 @ 1850 MAB Tuesday 31 July - regular pushes at 1735, 1755, 1813, 1832, and 1850, but no true eruptions seen in that time frame
374 21 Jul 2012 @ 1639 21 Jul 2012 @ 1934 MAB Push with no eruption 3 out of 9 intervals (1639, 1819, and 1934)
77 14 Jan 2012 @ 1845 --- Graham Water came up, then went down without erupting.
4725 19 Jul 1999 @ 1800 --- research-mab 07/19/1999 Constant “constantly” every 15-20 min
EntrySourceLinkComment
09 Aug 2014 @ 1654 JSJ https://www.flickr.com/photos/jsjgeology/15401110206 Photo (1 of 2) of Constant Geyser's 4:54 PM eruption on 9 August 2014.
09 Aug 2014 @ 1638 JSJ https://www.flickr.com/photos/jsjgeology/15237473020 Photo (1 of 3) of Constant Geyser's 4:38 PM eruption on 9 August 2014.
07 Jul 2014 @ 1755 JSJ https://www.flickr.com/photos/jsjgeology/15045557957 Photo (1 of 4) of Constant Geyser's 5:55 PM eruption on 7 July 2014.
07 Jul 2014 @ 1500 JSJ https://www.flickr.com/photos/jsjgeology/15232117335 Photo (1 of 5) of Constant Geyser's 3:00 PM eruption on 7 July 2014.
07 Jul 2014 @ 1443 JSJ https://www.flickr.com/photos/jsjgeology/15229022821 Photo (1 of 4) of Constant Geyser's 2:43 PM eruption on 7 July 2014.
07 Jul 2014 @ 1342 JSJ https://www.flickr.com/photos/jsjgeology/15045335649 Photo (1 of 3) of Constant Geyser's 1:42 PM eruption on 7 July 2014.
Baseline does not exist.