Last Known Eruption
3d 16h 58m ago

Latest Eruptions

Eruption DurationInterval
11 Jun 2025 @ 1945 maj12h 53m
11 Jun 2025 @ 0652 maj11h 3m
10 Jun 2025 @ 1949 ini maj3h 37m
10 Jun 2025 @ 1612 ie7h 55m
10 Jun 2025 @ 0817 ie3h 17m
10 Jun 2025 @ 0500 ie9h 43m
09 Jun 2025 @ 1917 maj8m
09 Jun 2025 @ 190910h 54m
09 Jun 2025 @ 0815 ie2h 47m
09 Jun 2025 @ 0528 ie16h 29m
08 Jun 2025 @ 1259 ie20h 20m
07 Jun 2025 @ 1639 maj11m
07 Jun 2025 @ 1628 min4h 57m
07 Jun 2025 @ 1131 maj4h 28m
07 Jun 2025 @ 0703 maj11m
07 Jun 2025 @ 0652 min15h 3m
06 Jun 2025 @ 1549 maj10m
06 Jun 2025 @ 1539 min9h 18m
06 Jun 2025 @ 0621 maj13m
06 Jun 2025 @ 0608 min12h 46m
05 Jun 2025 @ 1722 maj11m
05 Jun 2025 @ 1711 min2d 2h 17m
03 Jun 2025 @ 1454 maj5h 34m
03 Jun 2025 @ 0920 maj3h 47m
03 Jun 2025 @ 0533 ie3d 15h 46m
30 May 2025 @ 1347 maj2d 5h 29m
28 May 2025 @ 08186m 14m
28 May 2025 @ 08045m 15m
28 May 2025 @ 07494m 9m
28 May 2025 @ 07403m 1d 16h 28m
26 May 2025 @ 1512 maj1h 5m
26 May 2025 @ 1407 ie23h 54m
25 May 2025 @ 1413 maj3h 23m
25 May 2025 @ 1050 ns maj1d 1h 38m
24 May 2025 @ 0912 maj18h 29m
23 May 2025 @ 1443 maj1d 4h 15m
22 May 2025 @ 1028 ie maj1d 3h 59m
21 May 2025 @ 0629 maj21h 51m
20 May 2025 @ 0838 maj1d 22h 25m
18 May 2025 @ 1013 maj5m
18 May 2025 @ 10083m 8m
18 May 2025 @ 10005m 5m
18 May 2025 @ 09553m 9m
18 May 2025 @ 09468m 4m
18 May 2025 @ 09422m 44m
18 May 2025 @ 08583m 4m
18 May 2025 @ 08542m 5m
18 May 2025 @ 08492m 4m
18 May 2025 @ 08452m 5m
18 May 2025 @ 08403m 6m
18 May 2025 @ 08343m 4m
18 May 2025 @ 08301m 5m
18 May 2025 @ 08252m 4m
18 May 2025 @ 08212m 5m
18 May 2025 @ 08162m 4m
18 May 2025 @ 08121m 53m
18 May 2025 @ 07191m 7m
18 May 2025 @ 07123m 10m
18 May 2025 @ 07022m 8m
18 May 2025 @ 06543m 16h 59m
17 May 2025 @ 1355 maj4h 6m
17 May 2025 @ 0949 maj3h 59m 9m
17 May 2025 @ 09405m 6m
17 May 2025 @ 09344m 5m
17 May 2025 @ 09293m 7m
17 May 2025 @ 09223m 8m
17 May 2025 @ 09143m 11m
17 May 2025 @ 09035m 7m
17 May 2025 @ 08563m 8m
17 May 2025 @ 08484m 6m
17 May 2025 @ 08423m 8m
17 May 2025 @ 08343m 6m
17 May 2025 @ 08282m 8m
17 May 2025 @ 08203m 11m
17 May 2025 @ 08094m 10m
17 May 2025 @ 07593m 12m
17 May 2025 @ 07475m 10m
17 May 2025 @ 07372m 11h 13m
16 May 2025 @ 20244m 14m
16 May 2025 @ 20104m 10m
16 May 2025 @ 20002m 10m
16 May 2025 @ 19505h 8m
16 May 2025 @ 1442 maj5h 3m 12m
16 May 2025 @ 14303m 4h 47m
16 May 2025 @ 0943 maj12m
16 May 2025 @ 09313m 10m
16 May 2025 @ 09213m 2h 5m
16 May 2025 @ 0716 ie maj>1h 59m 12h 42m
15 May 2025 @ 1834 maj10m
15 May 2025 @ 18243m 4h 57m
15 May 2025 @ 1327 maj4h 51m 10m
15 May 2025 @ 13173m 4h 50m
15 May 2025 @ 0827 maj4h 42m 10m
15 May 2025 @ 08173m 3h 2m
15 May 2025 @ 0515 ie maj11h 24m
14 May 2025 @ 17512m 13m
14 May 2025 @ 17384m 13m
14 May 2025 @ 17254m 8m
14 May 2025 @ 17173m 4h 21m
14 May 2025 @ 1256 maj4h 16m 4h 2m

Interval Statistics

Interval Count100
Min4m
Max3d 15h 46m
Mean6h 49m
Median13m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
39880 15 Jun 2025 @ 0753 --- Polly On strong on my drive across the flats.
39875 14 Jun 2025 @ 1552 --- Tara shut off at this time as seen from the road.
39815 12 Jun 2025 @ 1419 --- mhreed Stop starting
39793 11 Jun 2025 @ 0645 --- Kyle pause post FTN
39790 10 Jun 2025 @ 1943 --- Kyle 1st and only pause post FTN
39785 09 Jun 2025 @ 1912 --- Kyle pause #2 post FTN
39784 09 Jun 2025 @ 1905 --- Kyle Clepsydra is paused. not in eruption. 1st post FTN pause
39724 07 Jun 2025 @ 1621 --- Mikemcc first pause
39723 07 Jun 2025 @ 1125 --- Mikemcc first pause
39716 07 Jun 2025 @ 0656 --- Kyle 2nd pause post FTN
39715 07 Jun 2025 @ 0646 --- Kyle 1st pause post FTN
39714 07 Jun 2025 @ 0541 --- Kyle on strong and steady
39709 06 Jun 2025 @ 1543 --- Kyle 2nd pause post FTN
39708 06 Jun 2025 @ 1532 --- Kyle 1st pause post FTN
39702 06 Jun 2025 @ 0613 --- Kyle 2nd pause post FTN
39701 06 Jun 2025 @ 0603 --- Kyle 1st pause post FTN
39665 05 Jun 2025 @ 1715 --- Kyle 2nd pause post FTN
39664 05 Jun 2025 @ 1705 --- Kyle pause after FTN
39615 01 Jun 2025 @ 1120 01 Jun 2025 @ 1138 Kyle Clepsydra appears to be on steady and strong viewed from road. FPP parking is a bit of a mess
39432 28 May 2025 @ 0858 --- mhreed Not in eruption.
39428 28 May 2025 @ 0735 --- SteveO Paused at 0735
39384 26 May 2025 @ 1927 26 May 2025 @ 1957 Stephen_Gemar Clepsydra had three pauses during this time. Left during the third pause.
39365 26 May 2025 @ 0748 --- TSBryan on without observed pauses
39343 25 May 2025 @ 0820 --- User34 On strong, side vent empty
39324 24 May 2025 @ 1503 --- LynnS Still in pause mode
39315 24 May 2025 @ 1422 --- Tara shut off for 5th pause, Spasm and Jelly coming up. looks like a stall
39266 22 May 2025 @ 1622 22 May 2025 @ 1631 LynnS Was not in eruption when Fountain started at 1630ns and remained off during Fountain’s eruption
39265 22 May 2025 @ 1613 22 May 2025 @ 1616 LynnS In a pause
39257 22 May 2025 @ 1346 --- Darcie Clep’s pausing
39251 22 May 2025 @ 0928 --- mhreed Off at this time.
39198 21 May 2025 @ 0543 21 May 2025 @ 0628 LynnS In pause mode.
39167 19 May 2025 @ 0810 --- mhreed Sputter starting.
39153 18 May 2025 @ 0901 18 May 2025 @ 0942 Graham Paused during and after Fountain in an aborted stall.
39152 18 May 2025 @ 0721 18 May 2025 @ 0811 Graham Sloppy play/Coughing. Lots of front vent bursting and occasional other vents. Not pausing for long enough to log.
39149 18 May 2025 @ 0643 --- Graham Paused. In a stall seen from parking lot.
39127 17 May 2025 @ 1348 --- Graham Paused 31m after Fountain quit
39121 17 May 2025 @ 0728 --- Graham Paused 22m after Fountain quit
39099 16 May 2025 @ 1947 --- Ajw Shut off 14m after Fountain ended
39102 16 May 2025 @ 1945 --- Graham Paused 12m after Fountain quit
39095 16 May 2025 @ 1423 --- Graham Paused 13m after Fountain
39087 16 May 2025 @ 0915 --- Graham Paused 11m after Fountain quit
39080 15 May 2025 @ 1818 --- Graham Paused 14m after Fountain quit
39066 15 May 2025 @ 1309 --- Graham Paused 12m after Fountain quit
39061 15 May 2025 @ 0811 --- Graham Paused 15m after Fountain quit
39054 14 May 2025 @ 1712 --- Graham Paused 13m after Fountain
39047 14 May 2025 @ 1250 --- Graham Paused 21m after Fountain quit
39050 14 May 2025 @ 0613 14 May 2025 @ 0828 LynnS In pause mode, when erupting, only one vent is active. Initial observation from the road, subsequent observations from Great Fountain, steam clouds disappearing and reappearing
39042 14 May 2025 @ 0651 --- Graham Paused. Already pausing 0613 per Lynn.
39025 13 May 2025 @ 0654 --- Graham Paused. Water high in CSV. Spasm. Jelly, Fountain down. Early in a stall. Spasm boiling on the rise.
39030 13 May 2025 @ 0100 --- K.Cooper paused and stayed off for 10min
39006 12 May 2025 @ 1240 --- K.Cooper heading into a stall
38999 12 May 2025 @ 0714 --- Graham Paused. CSV full. Fountain platform wet and post-eruptive.
38981 11 May 2025 @ 1006 --- Graham Paused 11m after Fountain
38928 10 May 2025 @ 1014 --- Graham Paused 14m after Fountain
38909 09 May 2025 @ 1218 --- Graham Paused 13m after Fountain quit
38892 08 May 2025 @ 1641 --- Graham Paused 15m after Fountain quit
38889 08 May 2025 @ 1123 --- Graham Paused 14m after Fountain quit
38856 06 May 2025 @ 1438 --- Graham Paused 13m after Fountain quit
38850 06 May 2025 @ 0949 --- Graham Paused 15m after Fountain quit
38840 04 May 2025 @ 1917 --- Graham Paused, in a stall.
38829 04 May 2025 @ 1310 --- Graham Paused between 23m and 28m after Fountain quit.
38753 02 May 2025 @ 1443 --- Graham Paused 13m after Fountain quit
38739 02 May 2025 @ 0937 --- Graham Paused 13m after Fountain
38715 30 Apr 2025 @ 1533 --- Graham Paused 14m after Fountain quit
38687 29 Apr 2025 @ 1112 --- Graham Paused 15m after Fountain quit
38657 27 Apr 2025 @ 1627 --- Graham Paused 15m after Fountain quit
38652 27 Apr 2025 @ 1001 --- Graham Paused 13m after Fountain
38643 26 Apr 2025 @ 1355 --- Graham Paused 25m after Fountain quit
38628 25 Apr 2025 @ 1721 --- Graham Paused 16m after Fountain quit
38621 25 Apr 2025 @ 1139 --- Graham Paused 35m after Fountain quit!
38606 24 Apr 2025 @ 1424 --- Graham Paused 13m after Fountain quit
38601 24 Apr 2025 @ 0801 --- Graham Paused 12m after Fountain quit
38596 23 Apr 2025 @ 1618 --- Graham Paused 14m after Fountain quit
38584 23 Apr 2025 @ 1121 --- Graham Paused 14m after Fountain quit. Did not stay for restarts. No stall observed later.
38572 22 Apr 2025 @ 1200 --- Graham Paused 13m after Fountain quit
38569 22 Apr 2025 @ 0705 --- Graham Paused
38564 21 Apr 2025 @ 1517 --- Graham Paused 13m after Fountain quit.
38556 20 Apr 2025 @ 1857 --- Graham Paused 17m after Fountain quit
38547 20 Apr 2025 @ 1240 --- Dan A Was on weak at 12:40 and then paused at 12:45
38494 19 Apr 2025 @ 1556 --- DanS Paused
38492 19 Apr 2025 @ 1543 --- Graham Paused 13m after Fountain quit.
38490 19 Apr 2025 @ 0940 --- Graham Paused 12m after Fountain quit
38348 01 Mar 2025 @ 1426 --- K.Cooper off as ftn ended. Still off as leaving at 1458.
38330 27 Feb 2025 @ 1936 --- K.Cooper on weakly
38316 25 Feb 2025 @ 2026 --- K.Cooper Off - Not staying for restarts
38296 24 Feb 2025 @ 0922 --- K.Cooper Not off but also certainly not on steady
38219 26 Jan 2025 @ 1330 --- JR Some very strong bursts…. 20’ or higher?
38167 07 Jan 2025 @ 1550 --- aferrara quiet
38136 02 Jan 2025 @ 1508 --- K.Cooper Turned off during Fountain - had not restarted upon departure. I don't think anyone is going out for the nighttime fountain todat
37752 24 Oct 2024 @ 1255 24 Oct 2024 @ 1642 rayceanderson On steady prior to and during Fountain. Did not stay to see if it paused after Fountain.
37693 23 Oct 2024 @ 1348 --- DanS Loudly rumbling similar to Grotto start during erupting Fountain. Lasted until about 5 minutes after Fountain end. Water in vents looked normal.
37389 04 Oct 2024 @ 0052 --- Graham Pause in progress. Probably an aborted stall with the long pause, water high in Spasm and dropping, plus Jelly just below overflow. Fountain runoff wet and CSV full.
37233 28 Sep 2024 @ 1933 --- Graham 5th pause, going into a stall. Did not stay any longer.
37232 28 Sep 2024 @ 1842 --- Graham Paused after Fountain
37851 28 Sep 2024 @ 1138 --- Tara start of 3rd and final pause
37850 28 Sep 2024 @ 1128 --- Tara start of 2nd pause
37849 28 Sep 2024 @ 1120 --- Tara start of first pause
37197 27 Sep 2024 @ 1750 --- Tara looked to be on steady at this time as seen from road
37142 25 Sep 2024 @ 0745 --- TSBryan on steadily along with Spasm; Jet also active, water not visible in Fountain
37135 24 Sep 2024 @ 1531 --- Graham Paused 17m after Fountain quit
EntrySourceLinkComment
03 Jun 2017 @ 1100 JSJ https://www.flickr.com/photos/jsjgeology/35373533035 Photo of Clepsydra Geyser erupting during the late morning of 3 June 2017.
Baseline does not exist.