Last Known Eruption
10h 18m ago

Latest Eruptions

Eruption DurationInterval
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
29 Apr 2025 @ 0650 ie maj1d 14h 5m
27 Apr 2025 @ 1645 maj11m
27 Apr 2025 @ 16344m 6h 26m
27 Apr 2025 @ 1008 maj3h 13m
27 Apr 2025 @ 0655 ie maj>3h 6m 16h 53m
26 Apr 2025 @ 1402 maj5h 46m
26 Apr 2025 @ 0816 ie maj>5h 39m 13h 47m
25 Apr 2025 @ 18293m 13m
25 Apr 2025 @ 18163m 12m
25 Apr 2025 @ 18043m 15m
25 Apr 2025 @ 17494m 12m
25 Apr 2025 @ 17373m 9m
25 Apr 2025 @ 17283m 5h 32m
25 Apr 2025 @ 1156 maj5h 15m 11m
25 Apr 2025 @ 11454m 4h 45m
25 Apr 2025 @ 0700 ie maj>4h 39m 13h 33m
24 Apr 2025 @ 1727 maj8m
24 Apr 2025 @ 17193m 9m
24 Apr 2025 @ 17104m 11m
24 Apr 2025 @ 16593m 13m
24 Apr 2025 @ 16463m 9m
24 Apr 2025 @ 16372m 9m
24 Apr 2025 @ 16283m 9m
24 Apr 2025 @ 16193m 10m
24 Apr 2025 @ 16093m 15m
24 Apr 2025 @ 15545m 13m
24 Apr 2025 @ 15414m 14m
24 Apr 2025 @ 15275m 15m
24 Apr 2025 @ 15125m 13m
24 Apr 2025 @ 14594m 12m
24 Apr 2025 @ 14473m 10m
24 Apr 2025 @ 14373m 7m
24 Apr 2025 @ 14302m 6h 3m
24 Apr 2025 @ 0827 maj5h 57m 12m
24 Apr 2025 @ 08153m 8m
24 Apr 2025 @ 08073m 1h 7m
24 Apr 2025 @ 0700 ie maj>1h 1m 14h 13m
23 Apr 2025 @ 1647 maj13m
23 Apr 2025 @ 16344m 9m
23 Apr 2025 @ 16253m 1h 40m
23 Apr 2025 @ 1445 ie maj>1h 33m 6h 5m
23 Apr 2025 @ 0840 ie>2h 41m 20h 21m
22 Apr 2025 @ 1219 maj>4h 48m 11m
22 Apr 2025 @ 12085m 44m
22 Apr 2025 @ 1124 ie maj18h 27m
21 Apr 2025 @ 16573m 10m
21 Apr 2025 @ 16475m 7m
21 Apr 2025 @ 16403m 8m
21 Apr 2025 @ 16323m 6m
21 Apr 2025 @ 16262m 7m
21 Apr 2025 @ 16193m 7m
21 Apr 2025 @ 16122m 10m
21 Apr 2025 @ 16023m 12m
21 Apr 2025 @ 15505m 12m
21 Apr 2025 @ 15385m 13m
21 Apr 2025 @ 15255m 41m
21 Apr 2025 @ 1444 ie maj19h 32m
20 Apr 2025 @ 1912 maj10m
20 Apr 2025 @ 19024m 5h 42m
20 Apr 2025 @ 1320 ie maj>5h 37m 6h 16m
20 Apr 2025 @ 0704 ie maj15h 4m
19 Apr 2025 @ 1600 maj9m
19 Apr 2025 @ 15512m 5h 52m
19 Apr 2025 @ 0959 maj5h 44m 11m
19 Apr 2025 @ 09483m 2h 42m
19 Apr 2025 @ 0706 ie maj>2h 40m 22h 30m
18 Apr 2025 @ 0836 ie maj48d 22h 36m
28 Feb 2025 @ 0900 ie2d 13h 21m
25 Feb 2025 @ 1939 ie16d 6h 39m
09 Feb 2025 @ 1300 ie30d 22h 25m
09 Jan 2025 @ 1435 maj8m
09 Jan 2025 @ 14273m 8m
09 Jan 2025 @ 14194m 7m
09 Jan 2025 @ 14123m 6m
09 Jan 2025 @ 14063m 1d 22h 13m
07 Jan 2025 @ 15534d 3h 59m
03 Jan 2025 @ 1154 ie21h 20m
02 Jan 2025 @ 1434 ie maj83d 23h 23m
10 Oct 2024 @ 16119m
10 Oct 2024 @ 160273d 22h 40m
06 Oct 2024 @ 17225m 1d 7h 35m
05 Oct 2024 @ 0947 maj21h 7m
04 Oct 2024 @ 1240 ie maj11h 33m
04 Oct 2024 @ 0107 maj9h 17m
03 Oct 2024 @ 1550 ie maj1d 4h 17m
02 Oct 2024 @ 1133 ie maj1d 4h 47m
01 Oct 2024 @ 0646 ie maj>5h 31m 13h 23m
30 Sep 2024 @ 1723 ie maj7h 22m
30 Sep 2024 @ 1001 ie maj22h 7m
29 Sep 2024 @ 1154 ie maj16h 25m
28 Sep 2024 @ 19294m 17m
28 Sep 2024 @ 19127m 13m

Interval Statistics

Interval Count100
Min6m
Max83d 23h 23m
Mean2d 3h 19m
Median16m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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
36177 30 Jul 2024 @ 1044 --- skubba22 Very loud thumping sound coming from Clepsydra during Fountain eruption @10:34, thumping began in the middle of the eruption. Vents were on
35995 20 Jul 2024 @ 0930 --- Tara In short pause stall mode, pauses lasting about 2 minutes with sloppy restarts.
35953 18 Jul 2024 @ 0800 --- mhreed Not in eruption.
35826 10 Jul 2024 @ 1447 --- deanl off now -14:47 - though it continued after Fountain. Tried to restart a few times, failing until on @ 1458. Off 1502, atempt 1509, on 1511. Still on 1525.
35741 06 Jul 2024 @ 0740 --- Polly Only wispy steam near Fountain as I drove by.
35667 01 Jul 2024 @ 1709 --- K.Cooper on strong
35603 28 Jun 2024 @ 0520 28 Jun 2024 @ 0728 LynnS Clepsydra is in pause mode
35591 27 Jun 2024 @ 0821 27 Jun 2024 @ 0934 steve Observations from the road; Clepsydra has been turning on and off for the last hour. Off 0821, on 08323, off 0826, on 0831, off 0836, on 0843, off 0847, on 0853, off 0857, on 0904, off 0908, on 0914, off 0917, on 0920, off 0925, on 0930.
35579 26 Jun 2024 @ 1922 --- K.Cooper Off and staying off
35462 22 Jun 2024 @ 1926 --- Tara Off as seen from parking lot
35398 21 Jun 2024 @ 0745 --- K.Cooper appeared to be in pause mode from the road
35375 19 Jun 2024 @ 2036 --- Craigmon99 Thumping on larger jets
35292 17 Jun 2024 @ 1151 --- Craigmon99 Still in stall mode
35286 17 Jun 2024 @ 1024 --- Craigmon99 Pausing on and off every couple minutes
35285 17 Jun 2024 @ 1010 --- Craigmon99 Pausing
35283 16 Jun 2024 @ 2104 --- Craigmon99 Front pit vent filled with blue water during Fountain. Very loud sub audible thumps
35217 14 Jun 2024 @ 1221 14 Jun 2024 @ 1430 JSJ Off and on the entire time. Starts: 1223, 1227, 1232, 1336, 1242, 1247, 1252, 1257, 1303 ie, 1306, 1313 (still off at 1338 at least), 1359, 1407, 1412, 1421. 1430 - on & stayed on.
35213 14 Jun 2024 @ 0509 14 Jun 2024 @ 0514 LynnS Mot ie
35192 13 Jun 2024 @ 1825 --- Tara off as seen from parking lot.
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.