Last Known Eruption
60d 7h 51m ago

Latest Eruptions

Eruption DurationInterval
24 Jan 2023 @ 1531 ie14d 30m
10 Jan 2023 @ 1501 ie6d 6h 11m
04 Jan 2023 @ 0850 ns65d 3m
31 Oct 2022 @ 094745m 23h 2m
30 Oct 2022 @ 1045 ie8d 4h 23m
22 Oct 2022 @ 0622 E12h 7m
21 Oct 2022 @ 181511h 22m
21 Oct 2022 @ 0653 E22h 24m
20 Oct 2022 @ 0829 E3d 22h 56m
16 Oct 2022 @ 093322h 42m
15 Oct 2022 @ 1051 ie1d 9h 42m
14 Oct 2022 @ 0109 ie17h 17m
13 Oct 2022 @ 0752 E13h 35m
12 Oct 2022 @ 1817 ns10h 30m
12 Oct 2022 @ 0747 E13h 30m
11 Oct 2022 @ 1817 E13h 30m
11 Oct 2022 @ 0447 E10h 36m
10 Oct 2022 @ 1811 E9h 5m
10 Oct 2022 @ 0906 E19h 23m
09 Oct 2022 @ 1343>13h 13m
09 Oct 2022 @ 0030 A13h 39m
08 Oct 2022 @ 1051 E10h 20m
08 Oct 2022 @ 0031 E11h 46m
07 Oct 2022 @ 1245 ie10h 49m
07 Oct 2022 @ 0156 E12h 36m
06 Oct 2022 @ 132011h 48m
06 Oct 2022 @ 0132 E14h 12m
05 Oct 2022 @ 1120 E11h 17m
05 Oct 2022 @ 0003 E11h 15m
04 Oct 2022 @ 124811h 20m
04 Oct 2022 @ 0128 E14h 18m
03 Oct 2022 @ 1110 ie11h 12m
02 Oct 2022 @ 2358 E11h 11m
02 Oct 2022 @ 1247 E11h 19m
02 Oct 2022 @ 0128 E10h 53m
01 Oct 2022 @ 1435 ie9h 38m
01 Oct 2022 @ 0457 E13h 9m
30 Sep 2022 @ 154813h 3m
30 Sep 2022 @ 0245 E11h 26m
29 Sep 2022 @ 151910h 0m
29 Sep 2022 @ 0519 E11h 12m
28 Sep 2022 @ 1807 ie16h 11m
28 Sep 2022 @ 0156 E10h 7m
27 Sep 2022 @ 1549 ns14h 34m
27 Sep 2022 @ 0115 E14h 43m
26 Sep 2022 @ 1032 ie15h 26m
25 Sep 2022 @ 190610h 48m
25 Sep 2022 @ 081814h 12m
24 Sep 2022 @ 180610h 30m
24 Sep 2022 @ 0736 ie10h 42m
23 Sep 2022 @ 2054 E13h 42m
23 Sep 2022 @ 0712 ns11h 37m
22 Sep 2022 @ 1935 ns10h 37m
22 Sep 2022 @ 0858 ie12h 45m
21 Sep 2022 @ 2013 E11h 10m
21 Sep 2022 @ 090312h 18m
20 Sep 2022 @ 204511h 32m
20 Sep 2022 @ 091314h 20m
19 Sep 2022 @ 1853 E11h 5m
19 Sep 2022 @ 0748 E11h 43m
18 Sep 2022 @ 2005 E12h 46m
18 Sep 2022 @ 0719 E10h 39m
17 Sep 2022 @ 2040 E12h 52m
17 Sep 2022 @ 0748 E11h 43m
16 Sep 2022 @ 2005 E13h 20m
16 Sep 2022 @ 0645 E14h 36m
15 Sep 2022 @ 160915h 14m
15 Sep 2022 @ 0055 E12h 34m
14 Sep 2022 @ 1221 E12h 4m
14 Sep 2022 @ 0017 E10h 39m
13 Sep 2022 @ 1338 E9h 21m
13 Sep 2022 @ 0417 E11h 19m
12 Sep 2022 @ 1658 E11h 40m
12 Sep 2022 @ 0518 E10h 25m
11 Sep 2022 @ 185336m 11h 5m
11 Sep 2022 @ 0748 E11h 53m
10 Sep 2022 @ 1955 E13h 36m
10 Sep 2022 @ 0619 E10h 32m
09 Sep 2022 @ 19471d 3h 38m
08 Sep 2022 @ 160921h 35m
07 Sep 2022 @ 1834 ie9h 46m
07 Sep 2022 @ 0848 ie11h 31m
06 Sep 2022 @ 2117 A13h 27m
06 Sep 2022 @ 07501h 12m 10h 54m
05 Sep 2022 @ 2056 ? ie11h 55m
05 Sep 2022 @ 0901 ie1d 20h 58m
03 Sep 2022 @ 12031d 17m
02 Sep 2022 @ 1146 ie4d 22h 14m
28 Aug 2022 @ 1332 maj23h 43m
27 Aug 2022 @ 134923h 50m
26 Aug 2022 @ 1359 ie23h 56m
25 Aug 2022 @ 14033d 21h 38m
21 Aug 2022 @ 162523h 26m
20 Aug 2022 @ 165912h 14m
20 Aug 2022 @ 0445 A10h 26m
19 Aug 2022 @ 1819 ie2d 7h 51m
17 Aug 2022 @ 102823h 26m
16 Aug 2022 @ 1102 ie22h 37m
15 Aug 2022 @ 1225 ie1d 43m
14 Aug 2022 @ 1141:341d 11m

Interval Statistics

Interval Count100
Min9h 5m
Max65d 3m
Mean1d 15h 24m
Median12h 40m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
24473 21 Oct 2022 @ 1718 --- DanS In overflow
24458 21 Oct 2022 @ 0903 --- DanS Post eruptive
24459 21 Oct 2022 @ 0903 --- DanS Post eruptive
24389 15 Oct 2022 @ 1220 --- Smell of eggs Sat around G.F. From 12:20 to 15:50 the pool looked to be in recovery from the previous eruption, the pool had risen anywhere 6”-1’4’ from the time I sat, I assume that morning eruption was anywhere from 8:30 - 10:00.
24371 14 Oct 2022 @ 1440 --- Tara platform wet, channels damp, water visible but down and boiling a little at the edge; erupted maybe 2-3 hours earlier.
24357 13 Oct 2022 @ 1540 --- Tara runoff channels and platform damp, guessing eruption in last 2-3 hours. water level visible and rising with a bit of boiling around the edges. probably refilling?
24348 12 Oct 2022 @ 1635 --- Tara Channels dry, no water visible in crater
24344 09 Oct 2022 @ 1549 --- User34 Still i.e.
24285 06 Oct 2022 @ 1011 --- DanS Not in overflow yet
24220 04 Oct 2022 @ 1140 --- DanS Overflow in progress
24218 04 Oct 2022 @ 1005 --- DanS Not in overflow yet
24202 03 Oct 2022 @ 1600 --- Art Pool down about a foot or more. Probably erupted around 1100-1200?
24173 30 Sep 2022 @ 1439 --- RMichaels First overflow.
24113 25 Sep 2022 @ 1740 --- SteveO 1740 start of overflow.
24054 24 Sep 2022 @ 1510 --- Art About 6” below overflow already. Maybe an eruption before sunset tonight?
24024 23 Sep 2022 @ 1903 --- Art Still not in overflow yet
23978 21 Sep 2022 @ 0730 --- RLJones first overflow
23940 20 Sep 2022 @ 0800 --- Graham In overflow lightly trickling off the terraces. 0815 much noisier overflow. 0826 audible boil.
23845 15 Sep 2022 @ 1447 --- ThomasR Start of overflow. Initial light overflow at 1405 but not sustained.
23677 09 Sep 2022 @ 1215 --- Ben VL Pool pretty darn low. Guessing it had a long series last night. It is possible it could have been a crash. But if it is, it's a very large crash.
23613 06 Sep 2022 @ 2007 --- Art Start of overflow
23405 25 Aug 2022 @ 1347 --- cb In overflow at 1347 ie and tricking over all the Terrances & down toward White dome. nice rim boil.
23151 12 Aug 2022 @ 1334 --- minissa Largish steam cloud in the right place, but seen from the road
21802 06 Jun 2022 @ 1605 --- LynnS Start of overflow
21227 10 May 2022 @ 1346 --- ypcaribou Tall steam seen from main road at entrance to Firehole Lake Drive. May have been ie.
20156 28 Oct 2021 @ 0915 28 Oct 2021 @ 0925 DanS Quiet. Looks mid-cycle.
20154 27 Oct 2021 @ 1801 27 Oct 2021 @ 1835 DanS GF calm and pretty at sunset. No indication of being in Wild Phase.
20128 25 Oct 2021 @ 1829 --- steve Great Fountain is in overflow, the pool is not boiling and the area of steaming water outside of the main vent is relatively small.
20063 19 Oct 2021 @ 1528 --- mwolf begin overflow
20007 16 Oct 2021 @ 1750 --- annelies8 In overflow, not going to be super accurate with this but it's probably been going a while (at least 30?) already based on how far out the water has extended
19929 06 Oct 2021 @ 1505 --- am Boiling and in overflow upon arrival
19837 01 Oct 2021 @ 2010 --- BillJ No overflow yet, before it got too dark to see.
19745 26 Sep 2021 @ 1150 --- User34 Post-eruptive
19672 21 Sep 2021 @ 0706 --- Art In overflow already when we arrived at 0730, possibly starting at 0706 per others.
19659 19 Sep 2021 @ 1835 --- Graham Not in overflow yet but close.
19514 12 Sep 2021 @ 1432 --- steve First overflow
19480 11 Sep 2021 @ 1332 --- steve First overflow.
19358 07 Sep 2021 @ 1133 --- steve First overflow that held. There was an earlier overflow with a crash.
19247 02 Sep 2021 @ 1210 --- Barbara Lasseter Start of overflow
19126 28 Aug 2021 @ 1226 --- JeffL in overflow
19087 26 Aug 2021 @ 1247 --- Micah Kipple In overflow
19056 25 Aug 2021 @ 1221 --- minissa Of at 1221
19031 23 Aug 2021 @ 2107 --- steve It’s hard to tell by headlights, but this may be the time of first overflow.
19012 23 Aug 2021 @ 0946 --- steve First overflow 0946, prediction of about 1106
18981 21 Aug 2021 @ 1325 --- minissa Arrived late for initial burst but later bursts {I'm thinking 3rd and esp 4th} had excellent height, volume and energy with one very nice blue bubble
18971 21 Aug 2021 @ 0300 --- LynnS Eruption had completely finished.
18960 18 Aug 2021 @ 1806 18 Aug 2021 @ 1818 minissa Pool not quite to overflow and still rising when we left
18890 10 Aug 2021 @ 1627 --- User34 Overflow reachieved
18888 10 Aug 2021 @ 1600 --- aferrara After about 30 minutes in weak overflow, pool dropped ~1.5'. Out of overflow.
18889 10 Aug 2021 @ 1529 --- User34 First overflow, started crashing at 1600-1605
18829 04 Aug 2021 @ 1035 --- LynnS Start of overflow
18815 03 Aug 2021 @ 0948 --- LynnS Start of overflow
18806 02 Aug 2021 @ 1900 02 Aug 2021 @ 1930 aferrara Water still 1' below overflow, rising very slightly over range of observation.
18773 01 Aug 2021 @ 0930 --- User34 First overflow
18759 31 Jul 2021 @ 1006 --- LynnS Start of overflow
18744 30 Jul 2021 @ 1302 --- LynnS Into overflow
18729 29 Jul 2021 @ 1252 --- LynnS Start of overflow
18707 28 Jul 2021 @ 1449 --- LynnS Overflow start
18706 28 Jul 2021 @ 1408 --- LynnS Overflowed briefly, then crashed
18688 27 Jul 2021 @ 1434 --- LynnS Start of overflow
18659 25 Jul 2021 @ 1424 --- LynnS Start of overflow
18655 25 Jul 2021 @ 0743 --- LynnS Still in post-eruptive audible boiling stage. Water level has dropped such that boiling is not visible while standing on the boardwalk.
18635 24 Jul 2021 @ 1324 --- LynnS Start of oberflow
18612 23 Jul 2021 @ 1403 --- LynnS Start of overflow
18611 23 Jul 2021 @ 1317 --- LynnS Pool rose close to overflow 1317 then crashed out of sight.
18610 23 Jul 2021 @ 1241 --- LynnS Pool rose to just slightly below overflow. Pool dropped several inches but did not crash 1254.
18591 22 Jul 2021 @ 1530 --- LynnS Not yet in overflow
18590 22 Jul 2021 @ 0545 --- Barbara Lasseter In overflow. Trickling over outer terrace.
18562 21 Jul 2021 @ 0605 --- Barbara Lasseter Not in overflow
18546 20 Jul 2021 @ 0701 --- steve In overflow when I pulled up but only a small amount of the first terrace is steaming. I left a minute later to check on Pink Cone so no guarantee it stayed in overflow.
18548 20 Jul 2021 @ 0615 --- Barbara Lasseter Not in overflow
18545 19 Jul 2021 @ 1814 --- steve First overflow
18498 18 Jul 2021 @ 0944 --- steve First overflow.
18497 17 Jul 2021 @ 2146 --- steve In overflow, but I didn’t stop to find out when it started
18471 17 Jul 2021 @ 0926 --- steve First overflow, prediction 1050
18448 16 Jul 2021 @ 0926 --- steve First overflow. Predicted time for Great Fountain 1050
18436 15 Jul 2021 @ 1022 --- steve First overflow
18347 11 Jul 2021 @ 0553 --- User34 In overflow
18344 10 Jul 2021 @ 1345 --- Barbara Lasseter Not yet in overflow
18147 28 Jun 2021 @ 0500 --- LynnS In audible, light boiling overflow; not in overflow at 0400
18056 23 Jun 2021 @ 0810 --- LynnS Already in overflow
17919 19 Jun 2021 @ 1030 --- LynnS Already in audible overflow
17807 15 Jun 2021 @ 0555 --- LynnS Already in overflow
17759 13 Jun 2021 @ 1943 --- William in overflow upon first observation. best guess is 10-15m into overflow.
17634 09 Jun 2021 @ 1940 --- CraigC start of overflow
17563 08 Jun 2021 @ 0545 --- CraigC not in overflow
17514 06 Jun 2021 @ 1914 --- CraigC 4 strong series, 5th very weak nothing over 10 feet. 3rd had 3 amazing pops near beginning
17500 05 Jun 2021 @ 2120 --- User34 Post-eruptive, boiling low pool
17487 05 Jun 2021 @ 1625 --- Graham Still well below overflow.
17396 02 Jun 2021 @ 2115 --- Micah Kipple Crashed several inches. Still aways from ovf unless it has a quick recovery.
17363 01 Jun 2021 @ 2137 --- am Start of overflow
17323 31 May 2021 @ 1352 --- JSJ Inclinometer reading: highest water during Great Fountain Geyser's 1st series = ~89 feet.
17324 31 May 2021 @ 1324 --- JSJ Great Fountain's pre-eruption overflow reached Prawn Geyser's vent.
17313 31 May 2021 @ 1234 --- LynnS Overflow
17286 30 May 2021 @ 1455 --- LynnS Audible overflow ie
17285 30 May 2021 @ 0530 --- LynnS In overflow
17255 29 May 2021 @ 1648 --- LynnS Start of overflow
17254 29 May 2021 @ 0610 --- LynnS Start of overflow
17253 29 May 2021 @ 0530 --- LynnS Start of what turned out to be a false overflow; duration of overflow = 9 minutes. Followed by a crash in water level.
17229 28 May 2021 @ 0920 --- Barbara Lasseter overflow began
EntrySourceLinkComment
20 Sep 2020 @ 0940 JohnO https://youtu.be/sZzC-l1NQ74 Great Fountain Geyser eruption, September 20, 2020. Video composed of three clips from the first eruptive set. Eruption commenced 9:38 AM.
30 May 2018 @ 1726 EricZ https://static-geysercam-xyz.nyc3.digitaloceanspaces.com/GreatFountainGeyser.mp4 Video taken by tourist Grant Arinder
26 Jul 2017 @ 1752 JSJ https://www.flickr.com/photos/jsjgeology/36237239410 Photo (out of 10) of Great Fountain Geyser's 5:52 PM-onward eruption on 26 July 2017.
03 Jun 2017 @ 1832 JSJ https://www.flickr.com/photos/jsjgeology/34985316630 Photo (out of 9) of Great Fountain Geyser's evening eruption on 3 June 2017.
02 Jun 2017 @ 1645 JSJ https://www.flickr.com/photos/jsjgeology/35205457072 Photo (out of 7) of Great Fountain Geyser's late afternoon eruption on 2 June 2017.
02 Jun 2017 @ 1645 JSJ https://www.youtube.com/watch?v=UL1mwSjv1RY Time lapse video of Great Fountain Geyser's late afternoon eruption on 2 June 2017.
13 Aug 2016 @ 2027 JSJ https://www.youtube.com/watch?v=esB95f0I52U Time lapse video of Great Fountain Geyser's evening eruption on 13 August 2016.
13 Aug 2016 @ 2027 JSJ https://www.flickr.com/photos/jsjgeology/30109996042 Photo (1 of 7) of Great Fountain Geyser's evening eruption on 13 August 2016.
10 Aug 2016 @ 2018 JSJ https://www.flickr.com/photos/jsjgeology/30224237115 Photo (1 of 24) of Great Fountain Geyser's evening eruption on 10 August 2016.
10 Aug 2016 @ 2018 JSJ https://www.flickr.com/photos/jsjgeology/29594675523 Thermal image (1 of 3) of Great Fountain Geyser's evening eruption on 10 August 2016.
10 Aug 2016 @ 2018 JSJ https://www.youtube.com/watch?v=t4LIaXxRt0s Time lapse video of Great Fountain Geyser's evening eruption on 10 August 2016.
08 Sep 2014 @ 1505 Micah Kipple https://www.flickr.com/photos/sgplewka/15604440267 flickr
06 Sep 2014 @ 2003 Micah Kipple https://www.flickr.com/photos/wildwood4est/15368309463 flickr
13 Sep 2014 @ 1411 Micah Kipple https://www.flickr.com/photos/digbydachshund/15940278098 flickr
02 Jun 2014 @ 1303 Micah Kipple https://www.flickr.com/photos/125791209@N06/16128797716 flickr
25 Sep 2014 @ 1725 Micah Kipple https://www.flickr.com/photos/hhayk/16012608917 Flickr
24 Sep 2014 @ 1907 Micah Kipple https://www.flickr.com/photos/rtsmithcpa/15187347577 Flickr
24 Sep 2014 @ 1907 Micah Kipple https://www.flickr.com/photos/rtsmithcpa/15187166390 Flickr photo
19 Sep 2012 @ 1502 Jake http://www.youtube.com/watch?v=B3bTX5OQUEY a visitor\'s excellent video with the blue bubble at the 3 minute mark
Baseline does not exist.