Last Known Eruption
11h 58m ago

Latest Eruptions

Eruption DurationInterval
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
14 May 2025 @ 0854 maj3h 56m 9m
14 May 2025 @ 08456m 8m
14 May 2025 @ 08373m 5m
14 May 2025 @ 08325m
14 May 2025 @ 08272m 6m
14 May 2025 @ 08213m 4m
14 May 2025 @ 08172m 4m
14 May 2025 @ 08136m
14 May 2025 @ 08072m 5m
14 May 2025 @ 08022m 5m
14 May 2025 @ 07572m 6m
14 May 2025 @ 07512m 4m
14 May 2025 @ 07472m 7m
14 May 2025 @ 07402m 6m
14 May 2025 @ 07342m 10m
14 May 2025 @ 07244m 12m
14 May 2025 @ 07126m 11m
14 May 2025 @ 07016m 6m
14 May 2025 @ 0655 ie<5m 23h 46m
13 May 2025 @ 07096m 13m
13 May 2025 @ 06564m 23h 29m
12 May 2025 @ 0727 maj9m
12 May 2025 @ 07183m 21h 3m
11 May 2025 @ 1015 maj2h 35m
11 May 2025 @ 0740 ie maj12h 40m
10 May 2025 @ 1900 ie maj8h 30m
10 May 2025 @ 1030 maj10m
10 May 2025 @ 10203m 2h 50m
10 May 2025 @ 0730 ie maj16h 50m
09 May 2025 @ 1440 maj5m
09 May 2025 @ 14352m 10m
09 May 2025 @ 14252m 13m
09 May 2025 @ 14123m 11m
09 May 2025 @ 14013m 8m
09 May 2025 @ 13532m 11m
09 May 2025 @ 13423m 13m
09 May 2025 @ 13293m 15m
09 May 2025 @ 13143m 12m
09 May 2025 @ 13023m 13m
09 May 2025 @ 12493m 12m
09 May 2025 @ 12373m 11m
09 May 2025 @ 12263m 2h 41m
09 May 2025 @ 0945 ie maj16h 45m
08 May 2025 @ 1700 maj12m
08 May 2025 @ 16483m 5h 7m
08 May 2025 @ 1141 maj11m
08 May 2025 @ 11303m 2h 30m
08 May 2025 @ 0900 ie maj1d 15h 58m
06 May 2025 @ 1702 maj15m
06 May 2025 @ 16474m 11m
06 May 2025 @ 16364m 14m
06 May 2025 @ 16225m 16m
06 May 2025 @ 16065m 16m
06 May 2025 @ 15505m 17m
06 May 2025 @ 15335m 11m
06 May 2025 @ 15222m 14m
06 May 2025 @ 15084m 13m
06 May 2025 @ 14553m 10m
06 May 2025 @ 14453m 4h 29m
06 May 2025 @ 1016 maj4h 22m 13m
06 May 2025 @ 10033m 9m
06 May 2025 @ 09542m 2h 56m
06 May 2025 @ 0658 ie maj21h 46m
05 May 2025 @ 0912 ie maj12h 58m
04 May 2025 @ 2014 maj12m
04 May 2025 @ 20023m 13m
04 May 2025 @ 19493m 11m
04 May 2025 @ 19383m 14m
04 May 2025 @ 19245m 5h 56m
04 May 2025 @ 1328 maj11m
04 May 2025 @ 13174m 6h 42m
04 May 2025 @ 0635 ie maj>6h 30m 22h 13m
03 May 2025 @ 0822 maj12m
03 May 2025 @ 08107m 11m
03 May 2025 @ 07594m 10m
03 May 2025 @ 07493m 12m
03 May 2025 @ 07373m 15m
03 May 2025 @ 07226m 13m
03 May 2025 @ 07095m 13m
03 May 2025 @ 06563m 15h 56m
02 May 2025 @ 1500 maj>5h 8m 10m
02 May 2025 @ 14503m 4h 58m
02 May 2025 @ 0952 maj4h 51m 9m
02 May 2025 @ 09433m 2h 40m
02 May 2025 @ 0703 ie maj>2h 34m 13h 6m
01 May 2025 @ 1757 ie maj7h 27m
01 May 2025 @ 1030 ie maj18h 43m
30 Apr 2025 @ 1547 maj9m
30 Apr 2025 @ 15383m 54m
30 Apr 2025 @ 1444 ie maj16m
30 Apr 2025 @ 1428 ie maj7h 45m
30 Apr 2025 @ 0643 ie maj>4h 7m 11h 38m
29 Apr 2025 @ 1905 ie maj7h 36m
29 Apr 2025 @ 1129 maj11m
29 Apr 2025 @ 11184m 4h 28m

Interval Statistics

Interval Count100
Min4m
Max1d 15h 58m
Mean3h 42m
Median13m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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 Quit 12m after Fountain.
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
37127 23 Sep 2024 @ 1509 --- Graham Pauses 18m after Fountain quit.
37093 20 Sep 2024 @ 1618 --- Tara on steady as seen from road
37070 19 Sep 2024 @ 1516 --- Graham Paused 16m after Fountain quit
37017 17 Sep 2024 @ 0835 --- aferrara weakly starting and stopping, about an hour after fountain
37012 16 Sep 2024 @ 1125 --- Graham Paused 17m after Fountain quit
37003 16 Sep 2024 @ 0340 --- Graham Started a pause as I arrived at the Fountain group. Likely the first pause as Clep was on for a while I was walking over.
36993 15 Sep 2024 @ 1548 --- Graham Paused 17m after Fountain quit
36976 14 Sep 2024 @ 1247 --- Graham Paused 14m after Fountain quit.
36963 13 Sep 2024 @ 1907 --- Mikemcc ~7 min pause
36964 13 Sep 2024 @ 1857 --- Mikemcc ~5min pause
36962 13 Sep 2024 @ 1849 --- Mikemcc ~5 min pause
36946 13 Sep 2024 @ 0828 --- Kyle second Clepsydra pause post FTN
36945 13 Sep 2024 @ 0818 --- Kyle first pause after FTN
36944 13 Sep 2024 @ 0812 --- Kyle Clepsydra
36919 12 Sep 2024 @ 0514 --- Graham Paused and drained
36912 11 Sep 2024 @ 1620 --- Graham In stall mode. Did not stay.
36910 11 Sep 2024 @ 1533 --- Graham Paused 16m after Fountain quit.
36907 11 Sep 2024 @ 0947 --- Graham In a long stall.
36915 11 Sep 2024 @ 0825 --- Micah Kipple Sloppy Play. In "Stall mode"
36888 10 Sep 2024 @ 1514 --- Graham Paused 14m after Fountain quit
36887 10 Sep 2024 @ 0958 --- Graham Paused 14m after Fountain quit
36876 09 Sep 2024 @ 1748 --- Kyle paused after Fountain
36868 09 Sep 2024 @ 1300 --- Kyle paused for 6 min 22 sec
36858 09 Sep 2024 @ 0222 --- Graham Not ie. Spasm and Jelly high and not overflowing. Jet quiet. Small amount of wet in Jellys near runoff channel. nay not have been an eruption though. First splashes at 0254.
36847 08 Sep 2024 @ 1206 --- Graham Paused 16m after Fountain quit
36840 07 Sep 2024 @ 1820 --- Graham Front vent splashing about a minute then stopping for a minute. Other vents not joining in.
36838 07 Sep 2024 @ 1736 --- Graham Not ie. Front vent drained and splashing from depth. Spasm, Jelly, CSV, Fountain empty. Spasm boiling at depth.
36836 07 Sep 2024 @ 1648 07 Sep 2024 @ 1652 Tara paused during this time as seen from the road.
36832 07 Sep 2024 @ 1420 --- Graham noisy steam vent active.
36770 05 Sep 2024 @ 0937 --- steve Off, back on 0943
36721 03 Sep 2024 @ 1214 --- CP On steady
36691 02 Sep 2024 @ 0845 --- Tara approximate time, off as seen from parking lot
36597 28 Aug 2024 @ 1030 --- Scott H on strong
36556 26 Aug 2024 @ 1800 --- Kyle second pause post Fountain
36555 26 Aug 2024 @ 1754 --- Kyle first pause post Fountain
36545 25 Aug 2024 @ 1550 25 Aug 2024 @ 1610 Scott H Clep off and on. Spasm erupting
36515 22 Aug 2024 @ 1847 --- Kyle 2nd pause following FTN
36514 22 Aug 2024 @ 1839 --- Kyle Clepsydra pause following FTN
36439 17 Aug 2024 @ 1713 17 Aug 2024 @ 1719 LynnS Paused at this time; short, weak pause mode; front vent erupting sporadically
36418 15 Aug 2024 @ 1130 15 Aug 2024 @ 1154 LynnS Clepsydra turning on and off during this time. Start time of pauses unknown.
36255 03 Aug 2024 @ 2014 --- SantaFe108 2nd pause after Fountain, left after this.
36254 03 Aug 2024 @ 2005 --- SantaFe108 1st pause after Fountain.
36199 01 Aug 2024 @ 0802 --- Polly From the road, Clepsydra appeared to be on weakly.
36176 30 Jul 2024 @ 1115 --- skubba22 All vents off/paused at 11:15, restarted 11:18, paused again 11:27
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.