Last Known Eruption
31d 7h 51m ago

Latest Eruptions

Interval Statistics

Interval Count100
Min9h 16m
Max27d 2h 1m
Mean1d 20h 24m
Median13h 3m

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.