Last Known Eruption
13h 3m ago

Latest Eruptions

Eruption DurationInterval
14 Aug 2025 @ 0846:58 E16h 56m 0s
13 Aug 2025 @ 1550:58 E15h 7m 32s
13 Aug 2025 @ 0043:26 E17h 42m 0s
12 Aug 2025 @ 0701:26 E21h 26m 56s
11 Aug 2025 @ 0934:305m 12s 14h 37m 4s
10 Aug 2025 @ 1857:26 E18h 38m 0s
10 Aug 2025 @ 0019:26 E1d 6h 33m
08 Aug 2025 @ 17464m 23h 29m
07 Aug 2025 @ 1816:50 E1d 7h 26m
06 Aug 2025 @ 1050~6m 1d 22h 19m
04 Aug 2025 @ 1230:50 E1y 285d 16h 27m 56s
23 Oct 2023 @ 2002:54 E10h 0m 0s
23 Oct 2023 @ 1002:54 E12h 2m 0s
22 Oct 2023 @ 2200:54 E5d 1h 0m 0s
17 Oct 2023 @ 2100:54 E5h 56m
17 Oct 2023 @ 15047m 22s 5h 12m
17 Oct 2023 @ 09525m 13s 5h 7m
17 Oct 2023 @ 0444:54 E5h 32m 0s
16 Oct 2023 @ 2312:54 E5h 24m 0s
16 Oct 2023 @ 1748:54 E4h 28m 0s
16 Oct 2023 @ 1320:54 E3h 42m 0s
16 Oct 2023 @ 0938:54 E4h 48m 0s
16 Oct 2023 @ 0450:54 E5h 14m 0s
15 Oct 2023 @ 2336:54 E5h 22m 0s
15 Oct 2023 @ 1814:54 E5h 54m 0s
15 Oct 2023 @ 1220:54 E9h 54m 0s
15 Oct 2023 @ 0226:54 E7h 42m 0s
14 Oct 2023 @ 1844:54 E min12h 22m 0s
14 Oct 2023 @ 0622:54 E8h 46m 0s
13 Oct 2023 @ 2136:54 E min5h 58m 0s
13 Oct 2023 @ 1538:54 E min7h 16m 0s
13 Oct 2023 @ 0822:54 E min10h 44m 0s
12 Oct 2023 @ 2138:54 E min8h 40m 0s
12 Oct 2023 @ 1258:54 E min8d 15h 16m 42s
03 Oct 2023 @ 2142:12 E10h 38m 0s
03 Oct 2023 @ 1104:12 E1d 13h 44m 0s
01 Oct 2023 @ 2120:12 E8h 56m 0s
01 Oct 2023 @ 1224:12 E min2h 18m 0s
01 Oct 2023 @ 1006:12 E min3h 34m 0s
01 Oct 2023 @ 0632:12 E min2h 10m 0s
01 Oct 2023 @ 0422:12 E min2h 48m 0s
01 Oct 2023 @ 0134:12 E min5h 56m 0s
30 Sep 2023 @ 1938:12 E12h 46m 0s
30 Sep 2023 @ 0652:12 E3h 22m 0s
30 Sep 2023 @ 0330:12 E min2h 42m 0s
30 Sep 2023 @ 0048:12 E min2h 34m 0s
29 Sep 2023 @ 2214:12 E min3h 6m 0s
29 Sep 2023 @ 1908:12 E min3h 34m 0s
29 Sep 2023 @ 1534:12 E min4h 12m
29 Sep 2023 @ 1122 min2h 45m
29 Sep 2023 @ 0836:34 E min4h 0m 0s
29 Sep 2023 @ 0436:34 E1d 4h 24m 2s
28 Sep 2023 @ 0012:32 E6h 8m 0s
27 Sep 2023 @ 1804:32 E min4h 16m 0s
27 Sep 2023 @ 1348:32 E3h 10m 0s
27 Sep 2023 @ 1038:32 E min2h 30m 0s
27 Sep 2023 @ 0808:32 E min10h 4m 0s
26 Sep 2023 @ 2204:32 E4h 48m 0s
26 Sep 2023 @ 1716:32 E min3h 2m
26 Sep 2023 @ 1414 min2m 35s 2h 36m
26 Sep 2023 @ 1138 min30s 4h 51m
26 Sep 2023 @ 0646:32 E3h 44m 0s
26 Sep 2023 @ 0302:32 E min2h 40m 0s
26 Sep 2023 @ 0022:32 E min3h 32m 0s
25 Sep 2023 @ 2050:32 E min5h 46m 0s
25 Sep 2023 @ 1504:32 E6h 44m 0s
25 Sep 2023 @ 0820:32 E min3h 46m 0s
25 Sep 2023 @ 0434:32 E min3h 38m 0s
25 Sep 2023 @ 0056:32 E min4h 54m 0s
24 Sep 2023 @ 2002:32 E min6h 31m
24 Sep 2023 @ 1331 maj9m 4h 2m
24 Sep 2023 @ 0928:32 E min3h 16m 0s
24 Sep 2023 @ 0612:32 E min1d 20m 0s
23 Sep 2023 @ 0552:32 E2h 20m 0s
23 Sep 2023 @ 0332:32 E min7h 58m 0s
22 Sep 2023 @ 1934:32 E1d 22h 30m 0s
20 Sep 2023 @ 2104:32 E4h 4m 0s
20 Sep 2023 @ 1700:32 E min2h 24m 0s
20 Sep 2023 @ 1436:32 E min2h 28m
20 Sep 2023 @ 1208 min3h 18m
20 Sep 2023 @ 0850~6m 12h 41m
19 Sep 2023 @ 2008:32 E3h 12m 0s
19 Sep 2023 @ 1656:32 E min2h 34m 0s
19 Sep 2023 @ 1422:32 E min4h 9m
19 Sep 2023 @ 1013 min2m 50s 3h 4m
19 Sep 2023 @ 0708:32 E min5h 14m 0s
19 Sep 2023 @ 0154:32 E11h 56m 0s
18 Sep 2023 @ 1358:32 E2h 10m 0s
18 Sep 2023 @ 1148:32 E min3h 0m 0s
18 Sep 2023 @ 0848:32 E min7h 40m 0s
18 Sep 2023 @ 0108:32 E22h 52m 0s
17 Sep 2023 @ 0216:32 E4h 18m 0s
16 Sep 2023 @ 2158:32 E min4h 4m 0s
16 Sep 2023 @ 1754:32 E min2h 22m 0s
16 Sep 2023 @ 1532:32 E min54m 0s
16 Sep 2023 @ 1438:32 E min1h 24m 0s
16 Sep 2023 @ 1314:32 E min36m 0s
16 Sep 2023 @ 1238:32 E min1h 12m 0s
16 Sep 2023 @ 1126:32 E min2h 56m 0s
16 Sep 2023 @ 0830:32 E min2h 6m

Interval Statistics

Interval Count100
Min36m
Max1y 285d 16h 27m
Mean6d 23h 32m
Median5h 0m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
41074 14 Aug 2025 @ 1332 --- mhreed Still in overflow but sudden drop in water level by a few inches
41069 14 Aug 2025 @ 1008 14 Aug 2025 @ 1055 underarockphoto High and overflowing. Cycles of convection from both vents every 10-15 minutes. Convention just enough to make visible disturbances and push the scuzz out to the edge of the pool. No noted correlation with Constant pushes.
41041 13 Aug 2025 @ 0835 13 Aug 2025 @ 0932 MAB very steamy - did see slight burble from rooster tail 0842 - shore vent blips 0842 0846 0908 {brief} - after 0910 shore vent seen in every minute not that we know what it means yet - steamy conditions nothing else obvious except 2 instances of faint rooster tail convection
40932 09 Aug 2025 @ 1130 09 Aug 2025 @ 1630 cb no eruption but several bouts, just prior to Constant eruption, where there was doming over the center vent with occasional small bubble that pops and convection waves. small vents on the edge became more active as the afternoon wained. pool is still a grayish color. water is clearing
40880 07 Aug 2025 @ 0935 07 Aug 2025 @ 1315 cb shore vent and rooster tail are periodically active. mostly before Constant erupts and a bit more so if Constant crashes. Not much but a few mild convection waves from the center vent. The pretty red spiny thermophiles in the pool are now a gray color. Most likely from the muddy eruptions.
40870 06 Aug 2025 @ 1845 --- cb just below overflow, calm
40866 06 Aug 2025 @ 1400 --- mhreed Pushing. Still elevated outflow at 1424. Had to leave to do job things :(
40828 05 Aug 2025 @ 1235 05 Aug 2025 @ 1720 MAB back to bench after break - same occasional bubbles from rooster tail + shore vent with varying intensity - with wind and change of lighting no convection seen from main vent but it looks 'smoother' in the wind - can only imagine how much gunk is down in main vent - color is a seafoam green in the middle with edges darkened by presumably dislodged sediments - runoff is clear - will add times of increased activity in rooster tail and shore vent later
40826 05 Aug 2025 @ 0951 --- MAB at this time noticed increased blipping from rooster tail AND blips from the shore vent! - nothing from main vent yet - edge of Pinwheel channel receiving water from Whirligig is tan colored - not white but better than green!
40827 05 Aug 2025 @ 0832 05 Aug 2025 @ 0950 MAB mild bubbling from rooster tail
40640 27 Jul 2025 @ 1045 --- MAB First signs of life from main vent woohoo - just light convection but more hopeful than the past 20 months - also occasional bubbles from the holes nearer edges and small convection at rooster tail - after break the tiny vents throughout pool I note as the Dots also were active - crater still full of algae crud and gravels
40639 27 Jul 2025 @ 0810 --- MAB looks hottest I've seen in 1.5 years yay! - at bench 0830 in good overflow w floating bubbles - edges of N channel lighter but main channel below bridge still green - after steam burned off can see pool is still full of crud
40527 20 Jul 2025 @ 1630 20 Jul 2025 @ 1900 nails No activity observed. Not hot, light runoff. Calm and no bubbles.
39943 20 Jun 2025 @ 0829 --- MAB cool but in overflow
39841 13 Jun 2025 @ 0920 --- MAB a little fuller with more flow coming in from above and light ovfl down left channel - cool with a zillion floating bubbles
39473 29 May 2025 @ 0930 --- MAB pool dropped probably due to less water from upstream - gross floaties and scum - algae in channels below nearly dried out
38812 03 May 2025 @ 2118 --- K.Cooper looks worse than in March
38779 03 May 2025 @ 1045 --- MAB full and overflowing but cold - flooded by waters from upstream probably Tree Island that is having huge bursts - algae still in channels but some has washed away due to force - That's a LOT of water flowing in
38700 27 Apr 2025 @ 0934 --- MAB looks cold - zygogonium down length of channel
38499 19 Apr 2025 @ 0955 --- MAB trickle from left channel w zygogonium - right channel not in ovfl - waters entering crater from upstream in 2 channels
38421 10 Apr 2025 @ 1340 --- SantaFe108 Dormant. Lightly overflowing, with colloidal blue water. Scum bubbles floating on surface.
38282 23 Feb 2025 @ 1500 --- K.Cooper Sad. substantial runoff flowing into vent. dormancy blue. Definitely dormant. Streamers growing in runoff and pool edges.
38010 15 Dec 2024 @ 1621 --- K.Cooper No longer dormancy blue, different from October. Overflowing lightly and constantly. Light convection observed. Clear with just a tiny bit of colloidal blue very deep in the vent. no snow within a few inches of the waterline.
37816 29 Oct 2024 @ 0920 --- MAB still receiving water from Northern Porc
37766 25 Oct 2024 @ 0900 --- MAB Still green around the gills - deep sediment delta on N side ~5m wide and ~1m into pool undisturbed with green highlights - green also on the beige and orangish algae covered rocks in the crater - channel below BW still green
37750 24 Oct 2024 @ 1701 --- DanS Pool very low with scummy film covering about one third. May have erupted earlier today.
37715 24 Oct 2024 @ 1156 --- SantaFe108 LOW! Water 6-8in below overflow. Lots of scummy foam on surface.
37672 22 Oct 2024 @ 0848 --- MAB Low! Almost zero water flowing in from N Porcelain - maybe Blue drained since 19th? - cyanobacteria still present below channel by bw
37591 15 Oct 2024 @ 1000 15 Oct 2024 @ 1500 MAB water entering in two channels above the pool - slight overflow both channels - pool looks pearly blue and cool with very little steam - Zygoogonium is gone, when did that happen?
37500 10 Oct 2024 @ 1238 --- SantaFe108 In light overflow, with murky blue water...
37355 03 Oct 2024 @ 1030 --- SantaFe108 Light overflow, scum on surface. Sporting a beautiful milky blue shade of "Dormancy Blue".
37106 21 Sep 2024 @ 1345 21 Sep 2024 @ 1500 CP Light overflow. No change during time observed.
36806 06 Sep 2024 @ 1401 --- cb ☹️ just sad. lots of water coming into the pool from above. pool is a very cloudy, mucky blueish/brown color. no bubbles...no nothing!
35406 21 Jun 2024 @ 1105 21 Jun 2024 @ 1214 nails Barely overflowing. Blue grey and opalescent. A killdeer is wading in and nibbling from Whirligig’s runoff.
35351 19 Jun 2024 @ 1146 --- Craigmon99 Runoff channel is wet, however the pool is opalescent blue and stagnant.
35352 19 Jun 2024 @ 1146 --- Craigmon99 Runoff channel is wet, however the pool is opalescent blue and stagnant.
35064 10 Jun 2024 @ 0906 10 Jun 2024 @ 1212 SantaFe108 Milky blue and overflowing. Very sad :( 1212: Condition unchanged.
34964 07 Jun 2024 @ 0945 07 Jun 2024 @ 1048 CrisG lake placid state continues. teal center
34806 01 Jun 2024 @ 1345 01 Jun 2024 @ 1615 cb No activity at all! not even any steam! center of the pool has a tinge of opalescent blue with a slight red ring along the edges. pool below overflow🙁
34330 24 Apr 2024 @ 1248 --- DanS Flat calm with algae growing in outflow.
34235 19 Apr 2024 @ 0915 --- MAB cool with zygogonium in the left channel in the steady flow - just AT overflow with the right channel not fuily flowing and partially dry with no growths
34124 17 Mar 2024 @ 1035 17 Mar 2024 @ 1320 Mkeller No activity. No minors. The berm around the vent looks weathered like it hasn’t had a major in a while. Pool level never changed and I never saw any convection either
31724 29 Nov 2023 @ 1616 --- JR Various points throughout the day Whirligig seemed low, but couldn't confirm anything visual or audible.
29311 31 Oct 2023 @ 1700 --- MAB filled a bit in the last hours! Not quite reaching ovfl but ... progress!
29302 31 Oct 2023 @ 0846 31 Oct 2023 @ 1255 MAB Cloudy blue & LOW - NOT EVEN CLOSE to overflow - down a vertical foot! No change or fill in 4+ hrs - only a trickle coming in from channels upstream
29050 22 Oct 2023 @ 1310 22 Oct 2023 @ 1900 SantaFe108 In good overflow on arrival. Lots of suds on cloudy green pool surface with rooster tail + shore vent blips and bubbling near the front runoff channel. Did not change at all between 1310 and 1900.
28985 21 Oct 2023 @ 1600 --- JR Gentle overflow. Blue, slightly murky.
28916 20 Oct 2023 @ 0803 20 Oct 2023 @ 1040 MAB Quiet - left channel with good flow - right channel is wet but not steadily overflowing - upon arrival it looked like it just regained ovfl after a minor but stayed the same for 2.5 hours - as Constant heated up prior to erupting poor Whirligig looked cold in comparison
28886 19 Oct 2023 @ 1303 19 Oct 2023 @ 1518 DanS No change in runoff, pool height or indication of wanting to erupt.
28797 14 Oct 2023 @ 0835 --- MAB in overflow 0835 - left @1136 - same observed 1400-1455 - did see a slight sign of life starting 1044 teeny rooster tail blips and faint brief main vent convection - rooster tail looked a little better @ 1740
28747 12 Oct 2023 @ 1700 --- JR Overflowing. Clear.
28646 05 Oct 2023 @ 1310 05 Oct 2023 @ 1430 cb pool is overflowing out both channels. no activity. no convection or bubbling from the roostertail even. LOTS of white foamy stuff floating on the surface.
28592 30 Sep 2023 @ 0830 30 Sep 2023 @ 1232 MAB just regaining overflow @0830 - left the bench 1232 for Congress area - still full when I exited Porcelain about 1310
28545 29 Sep 2023 @ 1149 --- User34 Starting to overflow
28373 20 Sep 2023 @ 0945 --- Micah Kipple Back in light overflow.
28297 17 Sep 2023 @ 0900 17 Sep 2023 @ 1158 SantaFe108 No eruptions during this time, overflow slowly getting better over the course of 3 hours. Not even a bubble or a blip from Rooster Tail, just flat pool the whole time.
28253 14 Sep 2023 @ 1110 14 Sep 2023 @ 1215 CP Went into overflow about 11:15 and was still overflowing when we left at 12:15.
28155 09 Sep 2023 @ 1322 --- steve Perhaps a very weak minor. There was stronger overflow, some churning, and the rooster tail vent bubbled. Nothing went airborne
27518 11 Aug 2023 @ 1047 --- cb most have had a good eruption in the last hour. pool is ~2' below overflow
27223 25 Jul 2023 @ 0939 --- mhreed Pool in overflow. Minimal convection over rooster tail vent. Back to a more normal turquoise color.
26668 25 Jun 2023 @ 1221 --- steve Minor with almost no splashing from any vent
26667 25 Jun 2023 @ 1154 --- steve Weak minor lasting 14 seconds with only the rooster tail and shore vents active and weak rolling from main vent.
26666 25 Jun 2023 @ 1128 --- steve A really weak excuse for a minor. Main vent rolled a bit and the rooster tail and shore vents were on for just a few seconds
26650 24 Jun 2023 @ 1732 --- mhreed Pool rising, not yet at overflow. At 1752, rock on left side of pool covered.
26614 23 Jun 2023 @ 0955 --- cb from 0918 pool is in good overflow & Rooster tail vent is convecting. left area @ 1130 with pool still high & in overflow. no minors
26498 20 Jun 2023 @ 0710 --- SantaFe108 Barely in overflow on arrival.
25919 30 May 2023 @ 1910 --- MAB Last eyes on Whirligig so interval after last minor 1h 53m - receiving lots cold water from upstream during and after the heavy rains
25911 30 May 2023 @ 1046 --- TSBryan M A will probably have details of minir eruptions at 0920, 1003, and 1046
25884 29 May 2023 @ 1038 --- cb pool is very low. ~2'+ below overflow and a milky turquoise green color. pool filled/rose fast!
25146 11 Apr 2023 @ 1201 --- mhreed Low pool.
25054 27 Feb 2023 @ 1401 --- MAB appeared full from above but hard to see - upon arrival via Congress down a few inches - dreaded minors probably have returned
24139 27 Sep 2022 @ 1310 --- SteveO Big push.
24138 27 Sep 2022 @ 1244 --- SteveO Big push.
24137 27 Sep 2022 @ 1222 --- SteveO Big push.
23810 13 Sep 2022 @ 1526 --- CP Big push.
23808 13 Sep 2022 @ 1428 --- CP A small push from all vents.
23806 13 Sep 2022 @ 1355 --- CP Extended push.
23722 10 Sep 2022 @ 1629 --- CP Push similar to 1603.
23721 10 Sep 2022 @ 1603 --- CP Another nice push but as good as 1534.
23720 10 Sep 2022 @ 1534 --- CP Nice push from all vents.
23719 10 Sep 2022 @ 1327 --- CP Small push
23635 07 Sep 2022 @ 2007 --- MAB refilling - overflow 2027 - possible brief minor 2133 - stupid cloud again - left @ 80min post seen overflow 2148
23614 06 Sep 2022 @ 1935 --- MAB Low - refilling
23005 03 Aug 2022 @ 1133 --- cb reach overflow
22729 20 Jul 2022 @ 1356 --- cb pool ~3" below overflow. 1410 right channel in overflow.
22605 15 Jul 2022 @ 1627 --- cb copious overflow, push, no vent activity.
22602 15 Jul 2022 @ 1230 --- cb overflow
22568 14 Jul 2022 @ 1514 --- cb brief mid cycle play. 4 center vent blips that broke the surface & Rooster tail played for ~40s. overflow at 1547. (1H7M)
22541 13 Jul 2022 @ 1053 --- cb mid interval push, pool NOT in overflow. Rooster tail and shore vent played briefly. no sounds or bursts. Domed and blipped to 6". Saw this yesterday too
22540 13 Jul 2022 @ 0926 --- cb pool in copious overflow. push. no activity from vents
22277 01 Jul 2022 @ 0909 --- MAB aeen refilling 0832 - just reaching ovfl 0909
22151 27 Jun 2022 @ 1244 --- cb overflow at 1232 in both channels. 1322 shore and Rooster tail small blips that are off and on until Whirligig started
21673 02 Jun 2022 @ 1520 02 Jun 2022 @ 1525 CP Should have had something In this range but was a no show.
20101 24 Oct 2021 @ 1751 --- MAB not in overflow
20115 24 Oct 2021 @ 0853 --- MAB low pool refilling post eruption
19926 06 Oct 2021 @ 1703 --- cb came back from back basin and missed Whirligig next eruption by 15- 20m. pool is low in the crater but starting to fill. double drat.
19706 23 Sep 2021 @ 1659 23 Sep 2021 @ 1710 cb Start of overflow after 1659 minor
19695 23 Sep 2021 @ 1015 23 Sep 2021 @ 1018 SteveO 1015 start of overflow after 0923 minor. 1018 side vents started bubbling for about 10 seconds with increased overflow, pool did not below overflow but overflow dropped back to just a trickle.
19234 01 Sep 2021 @ 1135 01 Sep 2021 @ 1159 MAB did a VERY educational series of FLIR shots during overflow
19134 28 Aug 2021 @ 1651 --- Graham First overflow since the major.
EntrySourceLinkComment
08 Aug 2025 @ 1746 joecat818 https://www.facebook.com/share/v/17Lhb2sYu5/ Two videos of Whriligig erupting
24 Jun 2021 @ 0831 research-mab https://imgur.com/a/RmP8Y57 Temperature trace showing probable Whirligig at 0633 MDT
05 Jul 1979 @ 1618 research-mab https://live.staticflickr.com/65535/51722344421_7eddb3b9f2_4k.jpg Maths in the chart don't add up - times entered not necessarly what was in the logbook
05 Jul 1979 @ 1355 research-mab https://live.staticflickr.com/65535/51722344421_7eddb3b9f2_4k.jpg Maths in the chart don't add up - times entered not necessarly what was in the logbook
09 Jul 2017 @ 1901 tengland https://www.youtube.com/watch?v=pXnpmFwubqM Part 2
09 Jul 2017 @ 1901 tengland https://www.youtube.com/watch?v=YOQRbYIkdew 09-07-2017
09 Aug 2014 @ 1702 JSJ https://www.flickr.com/photos/jsjgeology/15237600338 Photo (1 of 9) of Whirligig Geyser's 5:02 to 5:05 PM eruption on 9 August 2014.
Baseline does not exist.