Last Known Eruption
14d 11h 57m ago

Latest Eruptions

Eruption DurationInterval
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
29 Jun 2020 @ 13379m 10m
29 Jun 2020 @ 13273m 2d 23h 36m
26 Jun 2020 @ 13514m 281d 1h 50m
19 Sep 2019 @ 1201 ie6d 20h 42m
12 Sep 2019 @ 15197d 2h 54m
05 Sep 2019 @ 122523h 47m
04 Sep 2019 @ 123815m 9d 2h 19m
26 Aug 2019 @ 10191m 18h 50m
25 Aug 2019 @ 15292m 1d 8h 2m
24 Aug 2019 @ 07271m 14h 34m
23 Aug 2019 @ 165319m 13d 6h 55m
10 Aug 2019 @ 09587m 15m
10 Aug 2019 @ 09432m 22m
10 Aug 2019 @ 092137m
10 Aug 2019 @ 08442m 23h 5m
09 Aug 2019 @ 09391d 1h 32m
08 Aug 2019 @ 0807 ie2d 17h 32m

Interval Statistics

Interval Count100
Min6m
Max281d 1h 50m
Mean7d 14h 11m
Median19h 2m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.