Last Known Eruption
29d 6h 12m ago

Latest Eruptions

Eruption DurationInterval
28 Oct 2021 @ 14451d 18m
27 Oct 2021 @ 1427 ie15d 4h 40m
12 Oct 2021 @ 0947 ie4d 23h 54m
07 Oct 2021 @ 09537d 17h 52m
29 Sep 2021 @ 1601 ie38m
29 Sep 2021 @ 15233m 8m
29 Sep 2021 @ 15153m 8m
29 Sep 2021 @ 15073m 12m
29 Sep 2021 @ 14553m 9m
29 Sep 2021 @ 14463m 12m
29 Sep 2021 @ 14342m 20m
29 Sep 2021 @ 14144m 19h 20m
28 Sep 2021 @ 18549m
28 Sep 2021 @ 184511d 2h 54m
17 Sep 2021 @ 155112m 7h 51m
17 Sep 2021 @ 0800 ie23m
17 Sep 2021 @ 0737 ie14d 14h 33m
02 Sep 2021 @ 17049m 1d 3h 31m
01 Sep 2021 @ 13333d 3h 41m
29 Aug 2021 @ 095211m 4d 21h 23m
24 Aug 2021 @ 12292m 6h 0m
24 Aug 2021 @ 0629 ns10h 58m
23 Aug 2021 @ 19319m 8m
23 Aug 2021 @ 19231d 10h 55m
22 Aug 2021 @ 08287m
22 Aug 2021 @ 082119h 15m
21 Aug 2021 @ 1306 ie28m
21 Aug 2021 @ 12382m 10d 22h 35m
10 Aug 2021 @ 140311m 1d 21h 40m
08 Aug 2021 @ 1623~9m 9m
08 Aug 2021 @ 1614~6m 15d 4h 15m
24 Jul 2021 @ 11592m 15h 22m
23 Jul 2021 @ 20371m 9m
23 Jul 2021 @ 20284m 8h 11m
23 Jul 2021 @ 12172m 18m
23 Jul 2021 @ 11592m 17h 42m
22 Jul 2021 @ 18172m 20m
22 Jul 2021 @ 175717m 7h 58m
22 Jul 2021 @ 095919m 5d 16h 37m
16 Jul 2021 @ 17222m 12m
16 Jul 2021 @ 17102m 15m
16 Jul 2021 @ 16552m 12m
16 Jul 2021 @ 16434m 12m
16 Jul 2021 @ 16314m 5h 48m
16 Jul 2021 @ 10431d 2h 59m
15 Jul 2021 @ 074422h 16m
14 Jul 2021 @ 092819d 14h 14m
24 Jun 2021 @ 1914 ie22h 30m
23 Jun 2021 @ 204412m 2d 5h 6m
21 Jun 2021 @ 15381h 0m
21 Jun 2021 @ 1438 ns21m
21 Jun 2021 @ 1417 ns9d 47m
12 Jun 2021 @ 13301d 2h 2m
11 Jun 2021 @ 11283d 20h 44m
07 Jun 2021 @ 14444d 1h 20m
03 Jun 2021 @ 132417d 2h 57m
17 May 2021 @ 1027~2m 19d 19h 43m
27 Apr 2021 @ 14441d 1h 43m
26 Apr 2021 @ 13011d 23h 22m
24 Apr 2021 @ 13399m 8m
24 Apr 2021 @ 1331~4m 16h 41m
23 Apr 2021 @ 2050~8m 10m
23 Apr 2021 @ 2040~4m 9h 18m
23 Apr 2021 @ 112210m
23 Apr 2021 @ 1112~7m 3d 1h 47m
20 Apr 2021 @ 0925~3m 183d 18h 57m
18 Oct 2020 @ 1428~13m 10m
18 Oct 2020 @ 1418~6m 5d 19h 44m
12 Oct 2020 @ 183412m
12 Oct 2020 @ 182221d 9h 48m
21 Sep 2020 @ 0834~5m 6m
21 Sep 2020 @ 0828~1m 20d 20h 15m
31 Aug 2020 @ 12132d 19h 38m
28 Aug 2020 @ 16352m 11m
28 Aug 2020 @ 16244m 9m
28 Aug 2020 @ 16153m 3d 23h 8m
24 Aug 2020 @ 17071m 6m
24 Aug 2020 @ 17014m 1d 2h 42m
23 Aug 2020 @ 14192m 26m
23 Aug 2020 @ 1353~3m 8m
23 Aug 2020 @ 1345~2.5m 9m
23 Aug 2020 @ 1336~3m 8m
23 Aug 2020 @ 1328~3.5m 11m
23 Aug 2020 @ 1317~3m 8m
23 Aug 2020 @ 1309~3m 12m
23 Aug 2020 @ 1257~3m 9m
23 Aug 2020 @ 1248~2m 11m
23 Aug 2020 @ 123710m
23 Aug 2020 @ 12271d 21h 40m
21 Aug 2020 @ 14471d 5h 25m
20 Aug 2020 @ 0922 ie45m
20 Aug 2020 @ 08372m 2s 1d 17h 47m
18 Aug 2020 @ 145017m 18s 6d 7h 36m
12 Aug 2020 @ 07145d 22h 35m
06 Aug 2020 @ 0839 ns8d 42m
29 Jul 2020 @ 0757 ? ie wc7d 23h 23m
21 Jul 2020 @ 08349m
21 Jul 2020 @ 0825 ie20d 12h 58m
30 Jun 2020 @ 19271m 7m
30 Jun 2020 @ 19201m 1d 5h 43m

Interval Statistics

Interval Count100
Min6m
Max183d 18h 57m
Mean4d 20h 39m
Median10h 8m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
19792 29 Sep 2021 @ 1540 --- Graham GF pressure pool came up slowly. SGF started splashing but it didn't erupt. Earlier GF pressure pool was rising on every cycle and SGF was erupting each cycle.
19790 29 Sep 2021 @ 1334 --- Graham Splashing in South Grotto Fountain small vents.
19148 29 Aug 2021 @ 1018 29 Aug 2021 @ 1048 BrianR Sporadic bursting from 2 to 10 ft
19046 24 Aug 2021 @ 1239 24 Aug 2021 @ 1327 BrianR Sporadic bursting to 8 ft at beginning of window to 2 ft near end of window
18639 24 Jul 2021 @ 1204 24 Jul 2021 @ 1217 BrianR Sporadic bursting to 4 ft
18607 23 Jul 2021 @ 1319 23 Jul 2021 @ 1321 BrianR Sporadic bursting to 2 ft
18606 23 Jul 2021 @ 1221 23 Jul 2021 @ 1229 BrianR Sporadic bursting to 8 ft
18605 23 Jul 2021 @ 1204 23 Jul 2021 @ 1217 BrianR Sporadic bursting to 4 ft
18597 22 Jul 2021 @ 1819 22 Jul 2021 @ 1913 BrianR Sporadic bursting to 6 ft
18596 22 Jul 2021 @ 1151 22 Jul 2021 @ 1156 BrianR Sporadic bursting to 4ft
18595 22 Jul 2021 @ 1027 22 Jul 2021 @ 1119 BrianR Sporadic bursting to 6 ft
17981 21 Jun 2021 @ 1438 --- William more splashing to 1'
17980 21 Jun 2021 @ 1418 --- William splashing to 1'
15772 28 Aug 2020 @ 1641 28 Aug 2020 @ 1733 BrianR Sporadic bursting up to 6 ft at start of note to 1 ft at end
15724 24 Aug 2020 @ 1710 24 Aug 2020 @ 1746 BrianR Sporadic bursting to 6 ft
15722 24 Aug 2020 @ 1019 24 Aug 2020 @ 1035 BrianR Sporadic splashes 1 to 2 ft
15718 23 Aug 2020 @ 1421 23 Aug 2020 @ 1431 BrianR Sporadic bursting from 2 to 4 ft
15717 23 Aug 2020 @ 1410 23 Aug 2020 @ 1413 BrianR Grotto Fountain like boil
15064 21 Jul 2020 @ 0847 --- William splashed to 2' but did not erupt
15063 21 Jul 2020 @ 0842 --- William splashed to 2' but did not erupt
14982 14 Jul 2020 @ 1628 14 Jul 2020 @ 1632 nails Intermittent splashing to a few feet
14819 30 Jun 2020 @ 1940 30 Jun 2020 @ 2000 BrianR Sporadic bursting to 6 ft Still going when I left the Grotto area
14797 29 Jun 2020 @ 1348 29 Jun 2020 @ 1435 BrianR Sporadic bursting to 6 ft
14742 26 Jun 2020 @ 1432 26 Jun 2020 @ 1440 BrianR Sporadic bursting to 2 ft , started and ended during Rocket Major
14741 26 Jun 2020 @ 1359 26 Jun 2020 @ 1426 BrianR Sporadic bursting to 6 ft, ended when Rocket Major started
13407 26 Aug 2019 @ 1020 26 Aug 2019 @ 1037 BrianR Sporadic bursting up to 6ft
13403 25 Aug 2019 @ 1533 25 Aug 2019 @ 1545 BrianR Sporadic bursting to 2 ft
13371 24 Aug 2019 @ 0730 24 Aug 2019 @ 0822 BrianR Sporadic bursting up to 6 ft before 8:00 up to 2 ft after
13367 23 Aug 2019 @ 1720 23 Aug 2019 @ 1812 BrianR Sporadic bursting 1 to 4 ft
12821 27 Jul 2019 @ 1330 27 Jul 2019 @ 1350 nails Intermittent bursting 1 to 6+ feet.
11980 26 Jun 2019 @ 1242 26 Jun 2019 @ 1342 BrianR Sporadic bursting 2 to 6 ft
11945 25 Jun 2019 @ 0648 25 Jun 2019 @ 0732 BrianR Sporadic bursting 2 to 6 ft
11944 24 Jun 2019 @ 1401 24 Jun 2019 @ 1436 BrianR Sporadic bursting 2 to 6 ft
11923 22 Jun 2019 @ 1241 22 Jun 2019 @ 1300 BrianR Sporadic bursts 2 to 3 ft
11902 21 Jun 2019 @ 1101 21 Jun 2019 @ 1147 BrianR Sporadic bursting 2 to 6 ft
5613 02 Sep 2017 @ 1745 --- WillBoekel weak splashing that looks like it is coming from depth.
2434 28 Sep 2015 @ 1005 --- Tara Splashing to about 1 foot.
854 03 Jul 2006 @ 0700 --- Tara South Grotto Fountain was active having eruptions at intervals of 7 to 15 minutes starting sometime before 0700. The eruptions alternated with high water levels in Indicator Spring and boiling episodes in Grotto Fountain.
7075 27 Oct 1992 @ 0000 27 Oct 1992 @ 2359 JarnoO no time given; d=17m16s
EntrySourceLinkComment
26 Jun 2020 @ 1353 JoeN https://www.youtube.com/watch?v=nxyrJ5gkvQA SGF video
06 Jun 2016 @ 1733 JSJ https://www.flickr.com/photos/jsjgeology/30892530906 Photo (1 of 5) of South Grotto Fountain Geyser's 5:33 PM-onward eruption on 6 June 2016.
06 Jun 2016 @ 1733 JSJ https://www.youtube.com/watch?v=m-Yr-A9rNLU All ten clips of this video compilation show South Grotto Fountain Geyser's 5:33 PM-onward eruption on 6 June 2016.
Baseline does not exist.