Last Known Eruption
25d 15h 58m ago

Latest Eruptions

Eruption DurationInterval
26 Oct 2024 @ 13291d 6m
25 Oct 2024 @ 13231d 23h 17m
23 Oct 2024 @ 1406 ie22h 34m
22 Oct 2024 @ 153221h 46m
21 Oct 2024 @ 1746 ie1d 1h 51m
20 Oct 2024 @ 155521h 10m
19 Oct 2024 @ 1845>10m 23h 42m
18 Oct 2024 @ 19031d 37m
17 Oct 2024 @ 1826 ie10h 31m
17 Oct 2024 @ 0755 ie11h 9m
16 Oct 2024 @ 20469h 52m
16 Oct 2024 @ 105411h 46m
15 Oct 2024 @ 2308 A11h 30m
15 Oct 2024 @ 113822h 39m
14 Oct 2024 @ 12591d 6h 41m
13 Oct 2024 @ 061811h 12m
12 Oct 2024 @ 190610h 33m
12 Oct 2024 @ 083314h 5m
11 Oct 2024 @ 182810h 12m
11 Oct 2024 @ 081612h 33m
10 Oct 2024 @ 194312h 16m
10 Oct 2024 @ 072711h 3m
09 Oct 2024 @ 202411h 22m
09 Oct 2024 @ 090212h 6m
08 Oct 2024 @ 205610h 44m
08 Oct 2024 @ 10129h 16m
08 Oct 2024 @ 005611h 6m
07 Oct 2024 @ 135021h 27m
06 Oct 2024 @ 1623 ie1d 3h 17m
05 Oct 2024 @ 13061d 3h 25m
04 Oct 2024 @ 094113h 20m
03 Oct 2024 @ 20211h 3m 10h 27m
03 Oct 2024 @ 095412h 34m
02 Oct 2024 @ 2120 ie10h 57m
02 Oct 2024 @ 10239h 48m
02 Oct 2024 @ 0035 ie13h 3m
01 Oct 2024 @ 113222h 39m
30 Sep 2024 @ 125322h 27m
29 Sep 2024 @ 14261d 58m
28 Sep 2024 @ 132822h 52m
27 Sep 2024 @ 143622h 58m
26 Sep 2024 @ 153823h 38m
25 Sep 2024 @ 1600 A23h 38m
24 Sep 2024 @ 16221d 4h 49m
23 Sep 2024 @ 11331d 2h 22m
22 Sep 2024 @ 091110h 58m
21 Sep 2024 @ 221312h 23m
21 Sep 2024 @ 095011h 45m
20 Sep 2024 @ 220514h 0m
20 Sep 2024 @ 080511h 20m
19 Sep 2024 @ 204511h 1m
19 Sep 2024 @ 09441d 37m
18 Sep 2024 @ 09079h 37m
17 Sep 2024 @ 2330 A11h 10m
17 Sep 2024 @ 122022h 6m
16 Sep 2024 @ 141412h 18m
16 Sep 2024 @ 015612h 15m
15 Sep 2024 @ 1341 ie30m 11h 34m
15 Sep 2024 @ 020712h 52m
14 Sep 2024 @ 131522h 28m
13 Sep 2024 @ 14471h 3m 1d 45m
12 Sep 2024 @ 1402 ie23h 47m
11 Sep 2024 @ 1415 ie1d 22h 14m
09 Sep 2024 @ 160123h 31m
08 Sep 2024 @ 163023h 42m
07 Sep 2024 @ 1648 ie9h 38m
07 Sep 2024 @ 0710 ie22h 19m
06 Sep 2024 @ 085145m 12h 5m
05 Sep 2024 @ 204612h 0m
05 Sep 2024 @ 08461h 3m 13h 10m
04 Sep 2024 @ 193612h 49m
04 Sep 2024 @ 06479h 55m
03 Sep 2024 @ 205241m 13h 39m
03 Sep 2024 @ 071312h 2m
02 Sep 2024 @ 19111h 0m 11h 23m
02 Sep 2024 @ 074811h 43m
01 Sep 2024 @ 200513h 3m
01 Sep 2024 @ 070212h 51m
31 Aug 2024 @ 18119h 58m
31 Aug 2024 @ 081312h 36m
30 Aug 2024 @ 193713h 40m
30 Aug 2024 @ 055711h 34m
29 Aug 2024 @ 182311h 52m
29 Aug 2024 @ 063111h 25m
28 Aug 2024 @ 190612h 30m
28 Aug 2024 @ 063611h 36m
27 Aug 2024 @ 19001h 6m 9h 45m
27 Aug 2024 @ 09159h 30m
26 Aug 2024 @ 234510h 20m
26 Aug 2024 @ 132523h 6m
25 Aug 2024 @ 141910h 29m
25 Aug 2024 @ 035012h 19m
24 Aug 2024 @ 15311d 1h 11m
23 Aug 2024 @ 142012h 35m
23 Aug 2024 @ 0145 A11h 5m
22 Aug 2024 @ 144011h 10m
22 Aug 2024 @ 0330 A14h 18m
21 Aug 2024 @ 131210h 32m
21 Aug 2024 @ 0240 A11h 12m
20 Aug 2024 @ 15281d 1h 57m

Interval Statistics

Interval Count100
Min9h 16m
Max1d 23h 17m
Mean16h 19m
Median12h 31m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
37592 16 Oct 2024 @ 0958 --- Bhoffer Recently began overflow
37517 10 Oct 2024 @ 1821 --- SantaFe108 Start of overflow.
37518 10 Oct 2024 @ 1820 --- steve First overflow within a minute or two of 1820.
37516 10 Oct 2024 @ 1653 --- mrsteed pool not yet full - no overflow
37466 09 Oct 2024 @ 1907 --- steve First overflow
37446 08 Oct 2024 @ 1635 --- mrsteed looks fairly empty
37421 06 Oct 2024 @ 1400 --- Tara trickle of overflow just starting, could not stay
37341 03 Oct 2024 @ 0820 --- Graham Approx start of overflow
37340 03 Oct 2024 @ 0745 --- Ben VL Close to overflow
37330 02 Oct 2024 @ 0906 --- Graham Start of overflow. Prediction 1016 to 1046.
37313 01 Oct 2024 @ 1009 --- TSBryan start of overflow
37314 01 Oct 2024 @ 1009 --- TSBryan start of overflow
37315 01 Oct 2024 @ 1009 --- TSBryan start of overflow
37316 01 Oct 2024 @ 1009 --- TSBryan start of overflow
37280 30 Sep 2024 @ 1125 --- Ben VL Start of overflow.
37238 29 Sep 2024 @ 0827 --- User34 Steaming hole
37192 27 Sep 2024 @ 1318 --- Art Great Fountain start of overflow per satellite text
37168 26 Sep 2024 @ 1427 --- Art In overflow per sat text
37162 26 Sep 2024 @ 0750 --- RLJones Pool is approximately 8 inches below overflow
37293 23 Sep 2024 @ 2321 --- Siegmund Not overflowing yet (as expected after very long duration morning eruption)
37290 22 Sep 2024 @ 2125 --- Siegmund Still not in overflow yet.
37097 20 Sep 2024 @ 2036 --- Dan A As of 2003 not yet in overflow, but pool is very high
37078 19 Sep 2024 @ 2012 --- Art Via Sat Text: GF about 50 minutes into overflow
37056 19 Sep 2024 @ 0817 --- Dan A Reached overflow at this time
36977 14 Sep 2024 @ 1416 --- Graham 4th stronger than 3rd. End 1403 5th weaker. End 1416 No 6th
36973 14 Sep 2024 @ 1155 --- CPartner first overflow 1155
36954 13 Sep 2024 @ 0851 --- Kyle quiet, lightly steaming. well below overflow
36856 08 Sep 2024 @ 1526 --- Tara radio call that overflow had started 10-15m before 1526
36867 08 Sep 2024 @ 1526 --- Kyle in early overflow probably 5-10 minutes in
36785 06 Sep 2024 @ 0713 --- Ben VL Not in overflow yet but pool is high.
36787 05 Sep 2024 @ 1910 --- steve First overflow
36782 05 Sep 2024 @ 0703 --- LynnS Start of overflow
36767 05 Sep 2024 @ 0650 --- Ben VL Was in overflow but dropped around this time
36752 04 Sep 2024 @ 1630 --- Graham NOT in overflow.
36750 04 Sep 2024 @ 0530 --- LynnS Already in overflow
36740 03 Sep 2024 @ 1920 --- steve First overflow.
36716 02 Sep 2024 @ 1750 --- Kyle overflow began
36700 02 Sep 2024 @ 0632 --- LynnS In overflow
36683 01 Sep 2024 @ 1840 --- steve First overflow, strong overflow
36689 01 Sep 2024 @ 1839 --- CP Start of overflow
36675 01 Sep 2024 @ 0600 --- LynnS In overflow, audible trickle at 0600 but no sounds of boiling.
36674 01 Sep 2024 @ 0430 --- LynnS Great Fountain was not in overflow at 0430.
36664 31 Aug 2024 @ 0646 --- LynnS Start of overflow
36652 31 Aug 2024 @ 0605 --- CraigC not in overflow yet
36657 30 Aug 2024 @ 1802 --- steve First overflow
36641 30 Aug 2024 @ 0510 --- LynnS In audible overflow
36614 29 Aug 2024 @ 0600 --- LynnS Is in heavy overflow
36594 28 Aug 2024 @ 0600 --- CraigC in audible overflow
36591 27 Aug 2024 @ 1811 --- Kyle in overflow already
36573 27 Aug 2024 @ 0835 --- LynnS Already in heavy overflow, audible boiling in the crater
36548 25 Aug 2024 @ 1304 --- LynnS Start of overflow
36547 25 Aug 2024 @ 0244 --- LynnS Overflow started before this time;started after 0220
36533 24 Aug 2024 @ 1429 --- Dan A As of 35 minutes ago not in overflow yet
36537 24 Aug 2024 @ 1410 --- LynnS Start of overflow
36536 24 Aug 2024 @ 1332 --- LynnS Start of overflow that lasted about 7 minutes.
36519 23 Aug 2024 @ 1256 --- LynnS Start of overtime
36511 22 Aug 2024 @ 1327 --- LynnS Start of overflow
36504 21 Aug 2024 @ 1201 --- LynnS Start of overflow
36490 20 Aug 2024 @ 1404 --- LynnS Start of overfloe
36438 17 Aug 2024 @ 1431 --- LynnS Overflow started
36437 17 Aug 2024 @ 0455 --- LynnS Ns for overflow—not trickling at 0502, trickling at 0510
36426 16 Aug 2024 @ 1411 --- LynnS Start of overflow
36419 15 Aug 2024 @ 1421 --- LynnS Start of overflow
36413 15 Aug 2024 @ 0430 --- LynnS Already in overflow when I arrived at 0430.
36411 14 Aug 2024 @ 1730 --- LynnS Start of overflow
36400 14 Aug 2024 @ 0457 --- LynnS In overflow when I arrived.
36392 13 Aug 2024 @ 1418 --- LynnS Start of overflow
36391 13 Aug 2024 @ 0425 --- LynnS Already in overflow when I arrived at 0425
36386 12 Aug 2024 @ 1653 12 Aug 2024 @ 1657 guttermangaming 2nd part of eruption, more water and large bursts of water many times. taller than last part
36385 12 Aug 2024 @ 1630 --- guttermangaming Lower beginning burst.
36384 12 Aug 2024 @ 1448 --- LynnS Back into overflow
36383 12 Aug 2024 @ 1426 --- LynnS Returned to overflow for about 5 minutes.
36382 12 Aug 2024 @ 1414 --- LynnS Start of overflow lasted 4-5 minutes
36372 11 Aug 2024 @ 1323 --- LynnS Start of overflow
36357 10 Aug 2024 @ 1228 --- LynnS Start of overflow out north channels
36338 09 Aug 2024 @ 1459 --- LynnS Start of overflow
36329 08 Aug 2024 @ 1518 --- LynnS Start of overflow
36302 06 Aug 2024 @ 1119 --- CraigC started overflow
36272 04 Aug 2024 @ 1306 --- mdschwarz Start of overflow
36271 04 Aug 2024 @ 1248 --- mdschwarz Pool down ~1 foot+ below overflow.
36270 04 Aug 2024 @ 1206 --- mdschwarz Not in overflow. Flat pool a few inches below overflow
36228 02 Aug 2024 @ 1700 --- annelies8 Not anywhere overflow, center is empty with some intermittent light splashing so I can only assume it has already erupted considering >13h interval. Not confident enough to make that official call though.
36215 02 Aug 2024 @ 0220 --- Bhoffer In Overflow
36214 02 Aug 2024 @ 0200 --- mhreed Unattended, needed to depart for Mammoth
36191 01 Aug 2024 @ 0535 --- Bhoffer Post eruptive
36190 01 Aug 2024 @ 0100 --- Tara calm pool, just at top of inner tube
36142 27 Jul 2024 @ 1550 27 Jul 2024 @ 2048 steve I arrived at great fountain about 8.5 hours after the last eruption (1550). Now it is 2048 and Great Fountain is not in overflow yet. I question if GF could have gone short enough that I missed it before I arrived. So, I guess it’s having a real long interval.
36108 26 Jul 2024 @ 0727 --- steve Post eruptive.
36103 25 Jul 2024 @ 1729 --- steve First overflow 1729
36096 25 Jul 2024 @ 0701 --- steve Already in overflow with moderate boiling.
36088 24 Jul 2024 @ 1912 24 Jul 2024 @ 2032 ypcaribou Filling but not in overflow yet at 1912. First audible trickles of overflow at 1923 (heard from roadside opposite boardwalk where I remained for most of sit). 1934 first visible wavy action in standing water around vent; little to no breeze. Insects waking up. Sizzle in pool at far edge from boardwalk 1938.1941 audible bubbling at edges despite LOTS of talking over at boardwalk benches.1954 nice roil up. 2006 frothy bubbles floating by in front of me as water starts to wet runoff area. 2014 Great Blue Heron flew over headed southish - none of the growing peanut gallery noticed. 2022 constant roiling on surface of pool for about 5 min now. 2032 meter boil!
36085 24 Jul 2024 @ 1849 --- deanl hasn't reached overflow yet
36082 24 Jul 2024 @ 0730 --- LynnS In audible overflow (started after 0625)
36056 23 Jul 2024 @ 0542 --- LynnS Start of overflow
36036 22 Jul 2024 @ 1656 --- steve First overflow
36035 22 Jul 2024 @ 1611 --- steve overflow, but then it dropped.
36040 22 Jul 2024 @ 0550 --- LynnS Already in overflow
36020 21 Jul 2024 @ 0717 --- LynnS Overflow started 0717
36008 20 Jul 2024 @ 1940 --- User34 Not yet in overflow
36002 20 Jul 2024 @ 0731 --- LynnS Start of overflow
EntrySourceLinkComment
20 Jul 2020 @ 1948 Delta4Heavy85 https://adobe.ly/3qagZW6 Picture of large spike during B2
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.