Last Known Eruption
1h 36m ago
Predicted Next Eruption
Aug 19 at 0731 ± 120 minutes

Latest Eruptions

EruptionDurationInterval
18 Aug 2017 @ 200111h 36m
18 Aug 2017 @ 082511h 51m
17 Aug 2017 @ 203410h 12m
17 Aug 2017 @ 102222h 40m
16 Aug 2017 @ 114221h 37m
15 Aug 2017 @ 140522h 23m
14 Aug 2017 @ 154212h 10m
14 Aug 2017 @ 0332 E10h 11m
13 Aug 2017 @ 172111h 19m
13 Aug 2017 @ 0602 E10h 30m
12 Aug 2017 @ 193210h 37m
12 Aug 2017 @ 085514h 41m
11 Aug 2017 @ 18149h 28m
11 Aug 2017 @ 0846 E12h 59m
10 Aug 2017 @ 194711h 25m
10 Aug 2017 @ 082222h 23m
09 Aug 2017 @ 095922h 15m
08 Aug 2017 @ 114411h 19m
08 Aug 2017 @ 0025 E13h 16m
07 Aug 2017 @ 110912h 40m
06 Aug 2017 @ 2229 E11h 42m
06 Aug 2017 @ 104712h 27m
05 Aug 2017 @ 2220 E10h 43m
05 Aug 2017 @ 113711h 51m
04 Aug 2017 @ 2346 E12h 5m
04 Aug 2017 @ 114110h 26m
04 Aug 2017 @ 0115 E11h 25m
03 Aug 2017 @ 135010h 0m
03 Aug 2017 @ 0350 E12h 11m
02 Aug 2017 @ 153910h 12m
02 Aug 2017 @ 0527 E12h 13m
01 Aug 2017 @ 171410h 22m
01 Aug 2017 @ 0652 E11h 22m
31 Jul 2017 @ 19309h 45m
31 Jul 2017 @ 094510h 46m
30 Jul 2017 @ 2259 E11h 9m
30 Jul 2017 @ 115010h 47m
30 Jul 2017 @ 0103 E10h 29m
29 Jul 2017 @ 143410h 40m
29 Jul 2017 @ 0354 E11h 44m
28 Jul 2017 @ 161014h 20m
28 Jul 2017 @ 0150 E10h 21m
27 Jul 2017 @ 15296m 10h 27m
27 Jul 2017 @ 0502 E11h 10m
26 Jul 2017 @ 175210h 14m
26 Jul 2017 @ 073810h 39m
25 Jul 2017 @ 205911h 30m
25 Jul 2017 @ 092911h 19m
24 Jul 2017 @ 2210 E11h 41m
24 Jul 2017 @ 102910h 46m
23 Jul 2017 @ 2343 E11h 23m
23 Jul 2017 @ 12209h 13m
23 Jul 2017 @ 0307 E14h 6m
22 Jul 2017 @ 130110h 23m
22 Jul 2017 @ 0238 E11h 44m
21 Jul 2017 @ 145412h 21m
21 Jul 2017 @ 0233 E10h 36m
20 Jul 2017 @ 155711h 21m
20 Jul 2017 @ 0436 E10h 41m
19 Jul 2017 @ 175510h 45m
19 Jul 2017 @ 071012h 31m
18 Jul 2017 @ 183910h 23m
18 Jul 2017 @ 081612h 28m
17 Jul 2017 @ 194812h 40m
17 Jul 2017 @ 0708 E11h 4m
16 Jul 2017 @ 2004 E9h 25m
16 Jul 2017 @ 103911h 34m
15 Jul 2017 @ 2305 E11h 20m
15 Jul 2017 @ 114510h 54m
15 Jul 2017 @ 0051 E13h 35m
14 Jul 2017 @ 111611h 21m
13 Jul 2017 @ 2355 E12h 6m
13 Jul 2017 @ 114911h 4m
13 Jul 2017 @ 0045 E11h 59m
12 Jul 2017 @ 124612h 37m
12 Jul 2017 @ 0009 E12h 6m
11 Jul 2017 @ 120310h 11m
11 Jul 2017 @ 0152 E13h 52m
10 Jul 2017 @ 120010h 29m
10 Jul 2017 @ 0131 E12h 11m
09 Jul 2017 @ 132010h 45m
09 Jul 2017 @ 0235 E12h 12m
08 Jul 2017 @ 142310h 8m
08 Jul 2017 @ 0415 E11h 32m
07 Jul 2017 @ 1643 ie10h 6m
07 Jul 2017 @ 063712h 50m
06 Jul 2017 @ 174711h 52m
06 Jul 2017 @ 0555 E11h 58m
05 Jul 2017 @ 175714h 28m
05 Jul 2017 @ 0329 E11h 44m
04 Jul 2017 @ 154510h 51m
04 Jul 2017 @ 0454 E13h 47m
03 Jul 2017 @ 150711h 58m
03 Jul 2017 @ 0309 E11h 57m
02 Jul 2017 @ 151212h 1m
02 Jul 2017 @ 0311 E11h 47m
01 Jul 2017 @ 15249h 40m
01 Jul 2017 @ 0544 E12h 49m
30 Jun 2017 @ 165513h 10m
30 Jun 2017 @ 0345 A11h 40m

Interval Statistics

Interval Count100
Min9h 13m
Max22h 40m
Mean12h 2m
Median11h 31m

Latest Notes

Note IDStart TimeEnd TimeEntrantNote
4427 09 Jul 2017 @ 1115 --- udo prediction 1400 +/- 2 hours 724 Victor
4349 22 Jun 2017 @ 1215 --- Maureen Overflow start 1215
3852 05 Nov 2016 @ 1545 --- Maureen Prediction 1710 + - 15 minutes.
3844 04 Nov 2016 @ 1606 --- Maureen Overflow start. prediction 1730 + - 15 minutes
3840 04 Nov 2016 @ 0920 --- udo Post eruptive.
3838 03 Nov 2016 @ 1725 --- udo Overflow started approx 1725. Predicted eruption 1835 1905.
3832 30 Oct 2016 @ 1834 --- steve Great Fountain was in overflow at 1834. did not wait in the rain. Not boiling much at that time
3825 28 Oct 2016 @ 1135 --- DanS Pool up with small boils at edges
3822 27 Oct 2016 @ 1412 --- udo Appears to be post eruptive. Beach is wet up to about 4 inches. Runoff channels trickling in all directions & all the way down to marsh by White Dome. Low pool edge boils.
3810 25 Oct 2016 @ 1833 --- DanS Now in overflow, didn't stay for dark time eruption
3809 25 Oct 2016 @ 1744 --- DanS Not in overflow yet.
3806 25 Oct 2016 @ 1115 --- DanS Post eruptive 1115
3805 24 Oct 2016 @ 1006 --- udo Overflow just started perhaps a minute or 3 ago.
3797 23 Oct 2016 @ 0740 --- DanS Post eruptive. All done
3796 22 Oct 2016 @ 1545 --- Maureen Prediction 1710 + - 15 minutes.
3793 21 Oct 2016 @ 1234 --- udo Predicted for 1410 1440
3791 19 Oct 2016 @ 1653 --- Devin C. The overflow prediction is 1745 +/- 15
3758 07 Oct 2016 @ 1305 --- Maureen Prediction 1430 + - 20 minutes. Weird overflow start so a bit bigger window than normal.
3745 04 Oct 2016 @ 1805 --- ARoe Empty
3735 01 Oct 2016 @ 1625 --- Maureen Prediction 1750 + - 15 minutes based on 1625 overflow start. Raining in the LGB.
3728 30 Sep 2016 @ 0835 --- Kitt B It was post eruptive at 0835 with small trickle of water heard at terrace near willows.
3725 29 Sep 2016 @ 0837 --- Kitt B Great Fountain was post eruptive with boiling in a lower level pool a terraces quiet. Probably erupted 1 to 2 hours before.
3723 27 Sep 2016 @ 0940 --- Kitt B It was post eruptive.
3718 26 Sep 2016 @ 0830 --- udo Post eruptive.
3704 22 Sep 2016 @ 1630 --- Maureen No water visible at all between 1440 and 1630. Could easily go outside of window, maybe in dark.
3692 20 Sep 2016 @ 0958 --- udo NPS prediction 1530
3638 10 Sep 2016 @ 1220 --- Maureen Overflow start 1220, prediction 1345 + - 15m
3589 01 Sep 2016 @ 1135 --- Maureen Prediction 1300 + - 15 minutes.
3582 01 Sep 2016 @ 0047 --- Devin C. It was not in overflow at 0010
3590 01 Sep 2016 @ 0000 --- Devin C. A visitor at White Dome said Great Fountain started around 2330
3580 31 Aug 2016 @ 1115 --- Maureen Prediction 1240 + - 15 minutes
3572 30 Aug 2016 @ 0530 --- LynnS Eruption had finished
3562 28 Aug 2016 @ 1100 --- udo NPS prediction for this afternoon is 1600 aka 4PM
3563 28 Aug 2016 @ 0700 --- Barbara Lasseter down 4-5 inches...little water in run offs
3561 28 Aug 2016 @ 0630 --- LynnS Post erupt ice boiling
3558 27 Aug 2016 @ 1710 --- Barbara Lasseter overflow over outer rim...no boiling
3555 27 Aug 2016 @ 0736 --- Barbara Lasseter in overflow
3549 26 Aug 2016 @ 1614 --- Barbara Lasseter in overflow...no boiling...3rd attempt to send this
3547 26 Aug 2016 @ 1612 --- Barbara Lasseter in overflow.... no boiling yet
3548 26 Aug 2016 @ 1612 --- Barbara Lasseter in early overflow...no boiling
3546 26 Aug 2016 @ 1600 --- udo Overflow started about 10 minutes ago or about 1600.
3493 14 Aug 2016 @ 0700 --- Barbara Lasseter very late in the eruption. Several 6 to 8 foot bursts at 0714
3445 08 Aug 2016 @ 0945 --- udo 1st overflow started 0945
3260 08 Jul 2016 @ 1450 --- Barbara Lasseter in overflow @ 1450. Maureen Edgerton saw it earlier, but I didn't catch the time
3253 08 Jul 2016 @ 0200 --- User34 Not yet in overflow
3175 02 Jul 2016 @ 1005 --- udo Post eruptive. Probably went before 0900.
3145 28 Jun 2016 @ 0930 --- udo Post eruption low boiling at 0930
3069 13 Jun 2016 @ 2006 --- LynnS From 2006 until 2011 Great Fountain's water level was about 10-12 inches below overflow with post-erupt ice boiling. Water from the most recent eruption was still trickling down the run-off channel at least 50-75 feet toward White Dome.
3034 10 Jun 2016 @ 0800 --- udo Runoff channel near 2nd culvert still trickling slightly. Guessing it went ~ 0600.
3010 08 Jun 2016 @ 1930 --- udo GF was not in overflow at 1930 but was rising. Probably will start after 2100.
3001 07 Jun 2016 @ 0648 --- Barbara Lasseter full. not in overflow
2910 28 May 2016 @ 2050 --- Tara Not yet in overflow.
2906 28 May 2016 @ 0915 --- cb well into overflow at 915
2604 01 Nov 2015 @ 1425 --- Maureen Overflow 1425. Prediction 1550 + - 15 minutes.
2589 30 Oct 2015 @ 1434 --- Maureen Overflow start 1434. Prediction 1600 + - 15 minutes.
2588 30 Oct 2015 @ 1316 --- udo As of 1315 it was 6-8 inches below overflow.
2583 26 Oct 2015 @ 1005 --- Maureen Overflow start 1005, prediction 1130 + - 15 minutes.
2575 24 Oct 2015 @ 1435 --- Maureen Overflow start 1435. Prediction 1600 + - 15 minutes.
2572 23 Oct 2015 @ 1443 --- Maureen Overflow 1355. Prediction 1520 + - 15 minutes. Fabulous day in the LGB
2569 22 Oct 2015 @ 1355 --- Maureen Overflow start 1355. Prediction 1520 +- 15 minutes
2567 21 Oct 2015 @ 1130 --- Maureen Overflow start. Prediction 1255 + - 15 minutes. The sun is out, woo hoo.
2546 14 Oct 2015 @ 1445 --- Maureen Overflow start 1445. Prediction 1610 + - 15 minutes
2542 13 Oct 2015 @ 1512 --- Maureen Overflow start 1512. Prediction 1640 + - 15 minutes.
2538 12 Oct 2015 @ 1402 --- Maureen Overflow start 1402. Prediction 1530 + - 15 minutes.
2489 08 Oct 2015 @ 1105 --- Maureen Overflow start 1105, prediction 1230 + - 15 minutes.
2487 07 Oct 2015 @ 1345 --- Maureen Overflow start 1345. Prediction 1510 + - 15 minutes.
2464 03 Oct 2015 @ 0910 --- Maureen Overflow start 0910. Prediction 1035 + - 15 minutes.
2456 02 Oct 2015 @ 1145 --- Maureen Overflow start 1145. Prediction 1310 + - 15 minutes.
2446 30 Sep 2015 @ 1558 --- udo Overflow started 1558. Prediction 1710 to 1750.
2443 30 Sep 2015 @ 0753 --- udo Done. In last stages. Boils audible in vent. Still running off of upper terrace but very slightly.
2437 29 Sep 2015 @ 0930 --- Maureen Overflow start 0930. Prediction 1055 + - 15 minutes.
2431 28 Sep 2015 @ 0910 --- Maureen Overflow start 0910. Prediction 1035 + - 15 minutes.
2427 27 Sep 2015 @ 1250 --- Maureen Overflow start at 1215. Prediction 1340 + - 15 minutes.
2418 25 Sep 2015 @ 1345 --- Maureen Overflow start 1345. Prediction 1510 +- 15 minutes.
2415 24 Sep 2015 @ 1527 --- Maureen Overflow start seen at 1527. Prediction is 1640 to 1710.
2412 23 Sep 2015 @ 1720 --- Maureen Prediction 1845 + - 15 minutes based on overflow start of 1720.
2374 18 Sep 2015 @ 1341 --- udo Overflow started 1341
2338 13 Sep 2015 @ 1059 --- Maureen Overflow start 1026. Prediction 1150 + - 15 minutes.
2317 10 Sep 2015 @ 1621 --- Maureen Overflow start 1621. Prediction 1745 + - 15 minutes
2289 07 Sep 2015 @ 1235 --- Maureen Overflow start 1235. Prediction 1400 + - 15 minutes.
2278 07 Sep 2015 @ 0620 --- Suzanne over by 0620
2270 05 Sep 2015 @ 1807 --- udo Overflow started 1807. Prediction window was 1430 to 1830 which ain't gonna happen.
2264 05 Sep 2015 @ 0558 --- Pat Snyder Possibly ie at this time. a lot of steam when I drove by.
2260 04 Sep 2015 @ 1800 04 Sep 2015 @ 1830 WillBoekel prediction based on overflow
2245 02 Sep 2015 @ 1215 --- Maureen Overflow start 1215. Prediction 1340 + - 15 minutes.
2232 01 Sep 2015 @ 1225 --- udo in early overflow before 1225. Predicted for 1330 1400 approximately.
2225 31 Aug 2015 @ 1650 --- Maureen Prediction is 1815 + - 15 minutes.
2201 28 Aug 2015 @ 1220 --- Maureen Overflow start. Prediction 1345 + - 15 minutes.
2189 26 Aug 2015 @ 0410 --- User34 Went into overflow sometime between 0405 and 0415
2185 24 Aug 2015 @ 1640 --- Maureen Prediction 1750 to 1820.
2175 22 Aug 2015 @ 0908 --- udo 1st overflow started 0908.
2171 21 Aug 2015 @ 0850 --- Maureen Overflow start.
2112 13 Aug 2015 @ 1710 --- udo Overflow started 1710
2097 12 Aug 2015 @ 0913 --- udo Overflow started 0913
2087 11 Aug 2015 @ 1710 --- udo Post eruptive. Erupted perhaps around 1500.
2019 04 Aug 2015 @ 1408 --- udo 1st overflow started 1329 and crashed. 2nd overflow started 1408.
1988 30 Jul 2015 @ 0810 --- udo Post eruptive.
1955 22 Jul 2015 @ 0747 --- udo Post eruptive
1949 21 Jul 2015 @ 1733 --- LynnS Great Fountain had a five minute false overflow at 1733.
1962 21 Jul 2015 @ 1248 --- LynnS Great Fountain was still doing post-eruptive boiling around the rim of the inner crater.
EntrySourceLinkComment
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/30139312821 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.


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