Last Known Eruption
21h 3m ago

Latest Eruptions

Eruption DurationInterval
18 Oct 2021 @ 132911h 41m
18 Oct 2021 @ 0148 E10h 33m
17 Oct 2021 @ 1515 E9h 28m
17 Oct 2021 @ 0547 E11h 0m
16 Oct 2021 @ 184710h 23m
16 Oct 2021 @ 0824 E11h 29m
15 Oct 2021 @ 2055 E12h 15m
15 Oct 2021 @ 0840 E11h 9m
14 Oct 2021 @ 2131 E12h 27m
14 Oct 2021 @ 0904 E11h 49m
13 Oct 2021 @ 2115 E12h 6m
13 Oct 2021 @ 0909 E11h 44m
12 Oct 2021 @ 2125 E11h 46m
12 Oct 2021 @ 0939 E10h 21m
11 Oct 2021 @ 2318 E8h 57m
11 Oct 2021 @ 142113h 27m
11 Oct 2021 @ 0054 E14h 48m
10 Oct 2021 @ 1006 ie12h 28m
09 Oct 2021 @ 2138 E10h 56m
09 Oct 2021 @ 104211h 27m
08 Oct 2021 @ 2315 E8h 48m
08 Oct 2021 @ 1427 ns10h 0m
08 Oct 2021 @ 0427 E11h 30m
07 Oct 2021 @ 1657 E12h 8m
07 Oct 2021 @ 0449 E13h 22m
06 Oct 2021 @ 152712h 40m
06 Oct 2021 @ 0247 E12h 5m
05 Oct 2021 @ 14429h 59m
05 Oct 2021 @ 0443 E10h 49m
04 Oct 2021 @ 175412h 8m
04 Oct 2021 @ 0546 E9h 28m
03 Oct 2021 @ 201811h 55m
03 Oct 2021 @ 082311h 23m
02 Oct 2021 @ 2100 E12h 7m
02 Oct 2021 @ 0853 E11h 5m
01 Oct 2021 @ 2148 E15h 59m
01 Oct 2021 @ 0549 E11h 19m
30 Sep 2021 @ 1830 A10h 48m
30 Sep 2021 @ 0742 E11h 26m
29 Sep 2021 @ 2016 E12h 54m
29 Sep 2021 @ 07221d 10h 58m
27 Sep 2021 @ 2024 ie1d 9h 31m
26 Sep 2021 @ 105312h 25m
25 Sep 2021 @ 2228 E9h 25m
25 Sep 2021 @ 1303 ns>1h 0m 11h 4m
25 Sep 2021 @ 0159 E11h 17m
24 Sep 2021 @ 144212h 24m
24 Sep 2021 @ 0218 E10h 17m
23 Sep 2021 @ 1601 E11h 27m
23 Sep 2021 @ 0434 E13h 27m
22 Sep 2021 @ 1507 E10h 10m
22 Sep 2021 @ 0457 E10h 33m
21 Sep 2021 @ 18249h 54m
21 Sep 2021 @ 083012h 44m
20 Sep 2021 @ 1946 E11h 46m
20 Sep 2021 @ 0800 A11h 50m
19 Sep 2021 @ 2010 E12h 45m
19 Sep 2021 @ 07251h 1m 10h 27m
18 Sep 2021 @ 2058 E10h 1m
18 Sep 2021 @ 1057 E9h 1m
18 Sep 2021 @ 0156 E11h 27m
17 Sep 2021 @ 1429 E10h 59m
17 Sep 2021 @ 0330 E12h 34m
16 Sep 2021 @ 145612h 24m
16 Sep 2021 @ 0232 E13h 12m
15 Sep 2021 @ 1320 E11h 59m
15 Sep 2021 @ 0121 E10h 35m
14 Sep 2021 @ 144610h 32m
14 Sep 2021 @ 0414 E12h 31m
13 Sep 2021 @ 1543 E12h 56m
13 Sep 2021 @ 0247 E10h 29m
12 Sep 2021 @ 161815h 29m
12 Sep 2021 @ 0049 E9h 56m
11 Sep 2021 @ 145314h 22m
11 Sep 2021 @ 0031 E12h 1m
10 Sep 2021 @ 1230 A10h 18m
10 Sep 2021 @ 0212 E12h 32m
09 Sep 2021 @ 1340:00 ie12h 20m
09 Sep 2021 @ 0120 E13h 29m
08 Sep 2021 @ 1151 ns11h 6m
08 Sep 2021 @ 0045 E11h 58m
07 Sep 2021 @ 124712h 12m
07 Sep 2021 @ 0035 E12h 48m
06 Sep 2021 @ 1147 E11h 18m
06 Sep 2021 @ 0029 E10h 25m
05 Sep 2021 @ 140411h 33m
05 Sep 2021 @ 0231 E12h 47m
04 Sep 2021 @ 134410h 35m
04 Sep 2021 @ 0309 E11h 52m
03 Sep 2021 @ 151713h 27m
03 Sep 2021 @ 0150 E12h 23m
02 Sep 2021 @ 132714h 29m
01 Sep 2021 @ 2258 E maj13h 27m
01 Sep 2021 @ 093113h 50m
31 Aug 2021 @ 194110h 26m
31 Aug 2021 @ 091512h 25m
30 Aug 2021 @ 2050 E9h 17m
30 Aug 2021 @ 1133 E11h 9m
30 Aug 2021 @ 0024 E13h 14m
29 Aug 2021 @ 1110 E11h 29m

Interval Statistics

Interval Count100
Min8h 48m
Max1d 10h 58m
Mean12h 8m
Median11h 45m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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
15944 03 Sep 2020 @ 1830 --- CraigC start of overflow
15902 30 Aug 2020 @ 1920 --- CraigC start of overflow. 1936 dropped, out of overflow. Back in overflow at 1942
15626 17 Aug 2020 @ 0955 --- Skippyphoto bubbling visible around rim.
15625 17 Aug 2020 @ 0950 --- Skippyphoto sound of overflow started.
15615 16 Aug 2020 @ 1948 --- CraigC start of overflow
15540 12 Aug 2020 @ 1809 --- LynnS Great Fountain start of overflow
15518 11 Aug 2020 @ 1744 --- CraigC in overflow
15151 02 Aug 2020 @ 1405 --- aferrara Nearly in overflow at 1330, water level more than 1ft below overflow when I returned at 1405
15110 26 Jul 2020 @ 1545 --- CraigC in overflow per observer
15070 21 Jul 2020 @ 1525 --- CraigC in overflow per Byron
15061 21 Jul 2020 @ 0627 --- CraigC already in overflow
15058 20 Jul 2020 @ 1822 --- William 1st overflow
15043 20 Jul 2020 @ 0650 --- CraigC 650 pool crashed, 718 in overflow
15040 19 Jul 2020 @ 1909 --- CraigC 2nd 1927 to 1932. 3rd 1941 to 1947. 4th 1956 to 2002. 5th 2009 to 2017
15039 19 Jul 2020 @ 1753 --- CraigC started overflow
14986 14 Jul 2020 @ 1715 --- CraigC already in overflow when I arrived
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.