Last Known Eruption
22h 18m ago

Latest Eruptions

Eruption DurationInterval
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 ie1d 24m
23 Sep 2022 @ 0712 ns11h 37m
22 Sep 2022 @ 1935 ns10h 37m
22 Sep 2022 @ 0858 ie23h 55m
21 Sep 2022 @ 090312h 18m
20 Sep 2022 @ 204511h 32m
20 Sep 2022 @ 091314h 18m
19 Sep 2022 @ 1855 ? ie4d 2h 46m
15 Sep 2022 @ 160915h 4m
15 Sep 2022 @ 0105 E2d 8h 7m
12 Sep 2022 @ 1658 E11h 40m
12 Sep 2022 @ 0518 E10h 25m
11 Sep 2022 @ 185336m 1d 23h 6m
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 @ 133223h 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
13 Aug 2022 @ 1130 ie21h 51m
12 Aug 2022 @ 1339 ie6d 4m
06 Aug 2022 @ 133523h 39m
05 Aug 2022 @ 1356 E3d 5h 18m
02 Aug 2022 @ 0838 E21h 29m
01 Aug 2022 @ 1109 ie2d 42m
30 Jul 2022 @ 1027 ns1d 19h 20m
28 Jul 2022 @ 1507 ns1h 15m 1d 2h 10m
27 Jul 2022 @ 1257 ie3d 5h 34m
24 Jul 2022 @ 0723 ns10h 58m
23 Jul 2022 @ 2025 ie1d 3h 35m
22 Jul 2022 @ 1650 ie7d 2h 10m
15 Jul 2022 @ 1440 ie2d 8h 0m
13 Jul 2022 @ 0640 ie1d 40m
12 Jul 2022 @ 0600 ie3d 13h 13m
08 Jul 2022 @ 1647 ie2d 8h 2m
06 Jul 2022 @ 0845 ie1d 13h 8m
04 Jul 2022 @ 1937 ie13h 17m
04 Jul 2022 @ 0620 ie3d 19h 17m
30 Jun 2022 @ 1103 ie22h 56m
29 Jun 2022 @ 12071h 9m 1d 1h 4m
28 Jun 2022 @ 11031d 22h 29m
26 Jun 2022 @ 1234 ie1d 10m
25 Jun 2022 @ 1224 ie2d 5h 12m
23 Jun 2022 @ 0712 ie4d 9h 33m
18 Jun 2022 @ 2139 ie2d 10h 21m
16 Jun 2022 @ 11184d 3h 50m
12 Jun 2022 @ 072811h 15m
11 Jun 2022 @ 2013 E15h 54m
11 Jun 2022 @ 0419 E11h 3m
10 Jun 2022 @ 171611h 26m
10 Jun 2022 @ 055011h 31m
09 Jun 2022 @ 181911h 19m
09 Jun 2022 @ 070049m 13h 4m
08 Jun 2022 @ 1756Approx 2013h 36m
08 Jun 2022 @ 04201h 4m 13h 0m
07 Jun 2022 @ 15201h 7m 11h 42m
07 Jun 2022 @ 0338 E10h 8m
06 Jun 2022 @ 173010h 55m
06 Jun 2022 @ 063539m 12h 3m
05 Jun 2022 @ 183210h 16m
05 Jun 2022 @ 081646m 13h 56m
04 Jun 2022 @ 1820 E8h 41m
04 Jun 2022 @ 093947m 10h 41m
03 Jun 2022 @ 225813h 58m
03 Jun 2022 @ 09001h 13m 10h 43m
02 Jun 2022 @ 2217 E10h 47m
02 Jun 2022 @ 113050m 11h 10m
02 Jun 2022 @ 0020 ie10h 58m
01 Jun 2022 @ 132210h 28m
01 Jun 2022 @ 0254 E10h 32m
31 May 2022 @ 162212h 48m
31 May 2022 @ 0334 E10h 37m
30 May 2022 @ 165712h 8m
30 May 2022 @ 0449 E19h 58m
29 May 2022 @ 08512h 13m 10h 26m
28 May 2022 @ 222511h 33m
28 May 2022 @ 105213h 54m
27 May 2022 @ 2058 E12h 10m
27 May 2022 @ 0848 E11h 53m
26 May 2022 @ 2055 E10h 37m

Interval Statistics

Interval Count100
Min8h 41m
Max7d 2h 10m
Mean1d 5h 31m
Median14h 15m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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
16422 14 Oct 2020 @ 1120 --- am Heavy overflow
16385 10 Oct 2020 @ 0743 --- steve No eruption yet this morning.
16382 09 Oct 2020 @ 1830 --- Art Pool full with visible boil up to 1-2’ from the south end of pool. Visitors stated no eruption since they had been observing (~20 minutes)
16381 09 Oct 2020 @ 1700 --- Art Still ie. Saw several large bursts with water falling outside of crater.
16379 09 Oct 2020 @ 1342 --- steve Quick rise and overflow again at 1342. This time it stayed up.
16378 09 Oct 2020 @ 1300 --- steve In overflow again at 1300 and dropped just below overflow a few minutes later. Then several minutes after that it crashed.
16377 09 Oct 2020 @ 1238 --- steve It went into overflow at 1238, but dropped out of overflow a couple of minutes later.
16332 05 Oct 2020 @ 1005 --- steve First overflow at about 1005 after a fast rise.
16329 04 Oct 2020 @ 1625 --- User34 Large crowd, low pool (couldn't tell if it was boiling or not), and still water on terraces. Not in overflow yet?
16315 01 Oct 2020 @ 1701 --- mhvogel I want to give all of the geyser enthusiasts a heads up. Beginning today, October 1, the NPS will no longer be predicting Great Fountain for the rest of the year. Half of our staff has left and we don't have enough people on our staff to go to the other basins and get geyser data. I will personally get GF and Fountain data when I have time. We will resume GF predictions beginning in May of next year. However, I will continue to post GF and Fountain E times on Geysertimes.
16288 27 Sep 2020 @ 1246 --- am In overflow when I arrived
16281 27 Sep 2020 @ 0921 --- DanS Not in overflow
15989 05 Sep 2020 @ 1640 --- jkgood Beginning of overflow
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.