Last Known Eruption
2d 15h 2m ago

Latest Eruptions

Eruption DurationInterval
29 Feb 2024 @ 0816 ie wc2d 2h 32m
27 Feb 2024 @ 0544 wc7h 10m
26 Feb 2024 @ 2234 wc1h 25m 1d 22h 0m
25 Feb 2024 @ 0034 wc1d 3h 4m 6h 22m
24 Feb 2024 @ 1812 ns wc7h 11m
24 Feb 2024 @ 1101 ie wc6h 22m
24 Feb 2024 @ 0439 wc5h 52m
23 Feb 2024 @ 2247 wc1h 39m 5h 5m
23 Feb 2024 @ 1742 ns wc5h 4m
23 Feb 2024 @ 1238 ie wc11h 45m
23 Feb 2024 @ 0053 wc7h 12m
22 Feb 2024 @ 17411d 16h 39m
21 Feb 2024 @ 0102 ie wc4h 24m
20 Feb 2024 @ 2038 wc4h 51m
20 Feb 2024 @ 1547 wc56m 16h 47m
19 Feb 2024 @ 2300 wc5h49m < d < 7h13m9h 55m
19 Feb 2024 @ 1305 ie1d 23h 12m
17 Feb 2024 @ 1353 ie wc4d 3h 33m
13 Feb 2024 @ 1020 ns23h 26m
12 Feb 2024 @ 1054 ie wc2d 1h 12m
10 Feb 2024 @ 0942 ie21h 19m
09 Feb 2024 @ 1223 wc2d 2h 36m
07 Feb 2024 @ 0947 ie2d 17h 2m
04 Feb 2024 @ 1645 wc2d 13m
02 Feb 2024 @ 1632 ie wc3d 3h 26m
30 Jan 2024 @ 1306 ie7h 40m
30 Jan 2024 @ 0526 wc19h 54m
29 Jan 2024 @ 0932 ns wc5h 19m
29 Jan 2024 @ 0413 wc20h 25m
28 Jan 2024 @ 0748 wc5h 27m
28 Jan 2024 @ 0221 wc12h 3m
27 Jan 2024 @ 1418 wc5h 43m
27 Jan 2024 @ 0835 ie wc5h 34m
27 Jan 2024 @ 0301 wc4h 22m
26 Jan 2024 @ 2239 wc1d 8h 41m
25 Jan 2024 @ 1358 ie wc14h 47m
24 Jan 2024 @ 2311 wc12h 54m
24 Jan 2024 @ 1017 ie wc1d 2h 28m
23 Jan 2024 @ 0749 ie wc4h 46m
23 Jan 2024 @ 0303 wc2d 15h 23m
20 Jan 2024 @ 114022h 49m
19 Jan 2024 @ 12511d 29m
18 Jan 2024 @ 1222 ns1d 13m
17 Jan 2024 @ 1209 ie1d 9m
16 Jan 2024 @ 1200 ie21h 1m
15 Jan 2024 @ 1459 ie wc22h 49m
14 Jan 2024 @ 16101d 3h 11m
13 Jan 2024 @ 1259 wc5h 45m
13 Jan 2024 @ 0714 ? ns3d 20h 44m
09 Jan 2024 @ 1030 ie1d 19h 0m
07 Jan 2024 @ 1530 ie maj1d 5h 9m
06 Jan 2024 @ 1021 ie1d 2h 58m
05 Jan 2024 @ 0723 ie wc18h 10m
04 Jan 2024 @ 1313 ie wc1d 1h 28m
03 Jan 2024 @ 1145 ie wc18h 28m
02 Jan 2024 @ 1717 wc2d 7h 52m
31 Dec 2023 @ 0925 ie1d 18h 22m
29 Dec 2023 @ 1503 ie1h 58m
29 Dec 2023 @ 1305 ie1d 1h 31m
28 Dec 2023 @ 1134 ns wc1d 1h 56m
27 Dec 2023 @ 0938 ie21h 11m
26 Dec 2023 @ 1227 ns wc3d 22h 48m
22 Dec 2023 @ 1339 wc3d 4h 52m
19 Dec 2023 @ 0847 ie wc16h 34m
18 Dec 2023 @ 1613 ie wc2d 6h 6m
16 Dec 2023 @ 1007 ie21h 42m
15 Dec 2023 @ 1225 ie wc2d 21h 54m
12 Dec 2023 @ 1431 ie6d 2h 30m
06 Dec 2023 @ 1201 ie wc20h 32m
05 Dec 2023 @ 1529 ie wc4h 42m
05 Dec 2023 @ 1047 ie wc1d 3h 25m
04 Dec 2023 @ 0722 ie wc2d 22m
02 Dec 2023 @ 0700 ie wc1d 18h 47m
30 Nov 2023 @ 1213 ie wc22h 9m
29 Nov 2023 @ 1404 ie wc1d 2h 1m
28 Nov 2023 @ 1203 ie wc23h 26m
27 Nov 2023 @ 123719h 27m
26 Nov 2023 @ 1710 wc5h 58m
26 Nov 2023 @ 1112 ie wc19h 48m
25 Nov 2023 @ 1524 wc1d 1h 1m
24 Nov 2023 @ 1423 ie wc2d 7h 36m
22 Nov 2023 @ 0647 ie wc19h 59m
21 Nov 2023 @ 1048 ie wc2d 19h 56m
18 Nov 2023 @ 1452 wc1d 3h 48m
17 Nov 2023 @ 1104 ie wc1d 4h 26m
16 Nov 2023 @ 0638 ie wc1d 23h 40m
14 Nov 2023 @ 0658 ie wc17h 30m
13 Nov 2023 @ 1328 ie wc21h 22m
12 Nov 2023 @ 1606 wc7h 16m
12 Nov 2023 @ 0850 wc1d 1h 27m
11 Nov 2023 @ 0723 ie wc16h 8m
10 Nov 2023 @ 1515 ie wc6h 15m
10 Nov 2023 @ 0900 ie wc22h 2m
09 Nov 2023 @ 1058 ie wc17h 56m
08 Nov 2023 @ 1702 ie wc2d 9h 28m
06 Nov 2023 @ 0734 ie wc16h 3m
05 Nov 2023 @ 1531 wc7h 4m
05 Nov 2023 @ 0827 ie wc18h 58m
04 Nov 2023 @ 1429 ie wc1d 1h 38m
03 Nov 2023 @ 1251 ie wc1d 4h 36m

Interval Statistics

Interval Count100
Min1h 58m
Max6d 2h 30m
Mean1d 4h 34m
Median22h 5m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
34058 21 Feb 2024 @ 0903 --- JarnoO (wc) May still be ie from 0102ie (and has definitely been ie since 0903 as of writing). From overnight captures, ended around the 2254 Grand.
33826 16 Jan 2024 @ 1527 --- K.Cooper off.
33825 16 Jan 2024 @ 1512 --- K.Cooper restarted
33790 14 Jan 2024 @ 1455 --- K.Cooper had a good pressure pool with strong grotto fountain boiling. no water anywhere since as of 1549
32848 15 Dec 2023 @ 0955 --- Pholli quietly steaming
31056 23 Nov 2023 @ 0700 23 Nov 2023 @ 1330 MikeG Appeared to be off from sunrise until somewhere in middle of Giant's eruption.
31058 22 Nov 2023 @ 0650 22 Nov 2023 @ 1730 MikeG In eruption every time the webcam was pointed downbasin.
29395 03 Nov 2023 @ 1355 --- Delta4Heavy85 (Wc) Quiet
29358 02 Nov 2023 @ 1500 --- Delta4Heavy85 (Wc) Quiet
29203 29 Oct 2023 @ 1030 --- SantaFe108 End of eruption, quit right after I entered it ie.
28867 18 Oct 2023 @ 1614 --- Delta4Heavy85 (Wc) Quit
28831 17 Oct 2023 @ 0858 --- Delta4Heavy85 (Wc) Quiet, likely quit after the 0826 Rocket Major
28823 16 Oct 2023 @ 1236 --- Delta4Heavy85 (Wc) Quiet
28757 14 Oct 2023 @ 1249 --- Mikemcc Grotto ended at this time
28735 11 Oct 2023 @ 1845 --- Ben VL Still IE - another marathon. Either the same as last night's or the one after it.
28721 09 Oct 2023 @ 1605 --- aferrara ie, bijou dry, marathon pool down ~18" and boiling. Probably same eruption as this morning.
28603 01 Oct 2023 @ 1154 --- Mikemcc Grotto shut off at this time.
28528 28 Sep 2023 @ 1257 --- CraigC Grotto shut off
28508 27 Sep 2023 @ 1026 --- CraigC Grotto shut off
28507 27 Sep 2023 @ 0729 --- User34 Corner vent in steam, runoff channels trickling. Just turned off
28477 26 Sep 2023 @ 1205 --- CraigC Grotto shut off
28468 25 Sep 2023 @ 1231 --- Delta4Heavy85 (Wc) Quit 13m after the 1218 Rocket Major. D = 55m
28462 25 Sep 2023 @ 0920 --- CraigC Grotto shut off
28463 25 Sep 2023 @ 0758 --- CraigC Grotto ie
28438 24 Sep 2023 @ 1018 --- CraigC Grotto shut off
28424 23 Sep 2023 @ 1010 --- CraigC Grotto shut off
28362 20 Sep 2023 @ 1128 --- CraigC Grotto off
28342 19 Sep 2023 @ 1119 --- CraigC Grotto shut off
28337 19 Sep 2023 @ 0655 --- CraigC ie. possibly since last evening. Marathon Pool very very low, and boiling. Darcie noted Bijou off.
28207 11 Sep 2023 @ 0911 --- Colin_W Quiet
28161 09 Sep 2023 @ 2030 --- Ben VL Still ie at this time. Seems to be leaning towards a marathon.
28120 08 Sep 2023 @ 1444 --- CraigC Grotto shut off
28111 08 Sep 2023 @ 0921 --- CraigC Grotto shut off
28091 07 Sep 2023 @ 1429 --- CraigC Grotto shut off
28063 06 Sep 2023 @ 1736 --- CraigC Grotto shut off
27967 03 Sep 2023 @ 0650 --- CraigC Grotto was off when I arrived
27930 02 Sep 2023 @ 1050 --- CraigC Grotto turned off
27922 02 Sep 2023 @ 0852 --- CraigC Grotto turned off
27913 01 Sep 2023 @ 1752 --- CraigC Grotto turned off
27894 01 Sep 2023 @ 1036 --- CraigC Grotto turned off
27886 31 Aug 2023 @ 1455 --- Dan A Grotto is off
27869 30 Aug 2023 @ 1645 --- CraigC Grotto off
27866 30 Aug 2023 @ 1209 --- CraigC Grotto off
27848 29 Aug 2023 @ 1039 --- CraigC Grotto off
27829 28 Aug 2023 @ 1505 --- CraigC Grotto off
27820 28 Aug 2023 @ 0750 --- CraigC Grotto off
27813 27 Aug 2023 @ 0941 --- BrianR End of eruption
27798 26 Aug 2023 @ 1740 --- RMichaels Ended at this time.
27795 26 Aug 2023 @ 1512 --- BrianR End of eruption
27784 25 Aug 2023 @ 1926 --- BrianR End of eruption
27783 25 Aug 2023 @ 1510 --- BrianR End of eruption
27782 25 Aug 2023 @ 1056 --- BrianR End of eruption
27781 25 Aug 2023 @ 0711 --- BrianR End of eruption
27755 24 Aug 2023 @ 1422 --- BrianR End of eruption
27740 23 Aug 2023 @ 1724 --- BrianR End of eruption
27735 23 Aug 2023 @ 1236 --- BrianR End of eruption
27733 23 Aug 2023 @ 0809 --- BrianR End of eruption
27731 22 Aug 2023 @ 1758 --- BrianR End of eruption
27726 22 Aug 2023 @ 1436 --- BrianR End of eruption
27717 22 Aug 2023 @ 0933 --- BrianR End of eruption
27710 21 Aug 2023 @ 1547 --- BrianR End of eruption
27709 21 Aug 2023 @ 1059 --- BrianR End of eruption
27705 20 Aug 2023 @ 1830 --- BrianR End of eruption
27704 20 Aug 2023 @ 1400 --- BrianR End of eruption
27699 20 Aug 2023 @ 0830 --- BrianR End of eruption
27688 19 Aug 2023 @ 1639 --- BrianR End of eruption
27673 18 Aug 2023 @ 1900 --- BrianR Still i.e. when I left the area at 19:00, in marathon
27629 15 Aug 2023 @ 1530 15 Aug 2023 @ 1900 minissa Quiet, Bijou completely off, Marathon Pool refilling {about halfway at 1735}, nothing in Pressure Pool, no activity in Grotto Fountain. So assuming it's post marathon or other longish eruption
27617 15 Aug 2023 @ 1409 --- Ben VL Off by this time.
27543 12 Aug 2023 @ 2108 --- Ben VL Off by this time.
27527 11 Aug 2023 @ 1618 --- Dan A Off at this time
27488 10 Aug 2023 @ 0825 10 Aug 2023 @ 0830 aferrara Quit in this time window
27454 07 Aug 2023 @ 1509 --- Dan A Grotto off, no rocket
27416 05 Aug 2023 @ 1505 --- Mikemcc ended at this time
27314 29 Jul 2023 @ 1817 --- EmilyW Off at this time. Spa was high at 1440 and bijou off as well so this is likely the end of a prolonged eruption.
27225 25 Jul 2023 @ 1608 --- deanl ended by 1605 - another short eruption starting around 1509
27193 24 Jul 2023 @ 1230 --- deanl based on earlier Spa activity I believe Grotto is still in eruption from this morning and probably entering marathon
27158 23 Jul 2023 @ 1014 --- deanl ending at this time
27150 22 Jul 2023 @ 0948 --- JimS Quiet
27122 19 Jul 2023 @ 1157 --- deanl off at this time
27095 17 Jul 2023 @ 1435 --- deanl off now
27063 14 Jul 2023 @ 0556 --- dandersen Grotto off
27017 12 Jul 2023 @ 0828 --- Ben VL Off by now
26926 08 Jul 2023 @ 2113 --- Ben VL Looks like it's done when viewed from Grand. Probably quit within the last hour.
26904 08 Jul 2023 @ 0720 --- deanl changed my ie eruption to a note cuz it may have been a continuation of a marathon
26864 06 Jul 2023 @ 1421 --- JimS Quiet
26817 04 Jul 2023 @ 0858 --- Dan A Grotto is off
26762 01 Jul 2023 @ 1210 --- BrianR End of eruption
26761 01 Jul 2023 @ 0640 --- BrianR End of eruption
26752 30 Jun 2023 @ 1946 --- BrianR End of eruption
26748 30 Jun 2023 @ 1502 --- BrianR End of eruption
26743 30 Jun 2023 @ 0848 --- BrianR End of eruption
26732 29 Jun 2023 @ 1443 --- BrianR End of eruption
26730 29 Jun 2023 @ 0809 --- BrianR End of eruption
26724 28 Jun 2023 @ 1920 --- BrianR End of eruption
26711 28 Jun 2023 @ 1000 --- BrianR End of eruption
26698 27 Jun 2023 @ 0620 --- BrianR End of marathon eruption
26693 27 Jun 2023 @ 0600 --- BrianR Still i.e. from 10:12 eruption yesterday
26682 26 Jun 2023 @ 0849 --- BrianR End of eruption
26679 26 Jun 2023 @ 0713 --- BrianR End of eruption
EntrySourceLinkComment
18 Aug 2020 @ 1452 JSJ https://www.youtube.com/watch?v=L4pz9gWnQwk Video by Craig Corless showing the start of Grotto Geyser's 2:52 PM-onward eruption on 18 August 2020, with both Grotto Fountain Geyser & South Grotto Fountain Geyser erupting in the background.
03 Oct 2019 @ 1526 EricZ https://www.youtube.com/watch?v=YpsAVShVyxs&feature=youtu.be Grotto Start
15 Aug 2018 @ 0941 JSJ https://www.flickr.com/photos/jsjgeology/32563168958 Photo of initial runoff (approaching Variable Spring) from Grotto Geyser's 9:41 AM-onward eruption on 15 August 2018.
15 Aug 2018 @ 0941 JSJ https://www.flickr.com/photos/jsjgeology/44618689690 Photo of Grotto Geyser's 9:41 AM-onward eruption on 15 August 2018.
14 Aug 2015 @ 1314 JSJ https://www.flickr.com/photos/jsjgeology/21145226344 Photo of Grotto Geyser's 1:14 PM-onward eruption on 14 August 2015.
08 Jul 2014 @ 1430 JSJ https://www.flickr.com/photos/jsjgeology/15106150617 Photo of Grotto Geyser erupting during the mid-afternoon of 8 July 2014.
Baseline does not exist.