Last Known Eruption
45d 12h 28m ago

Latest Eruptions

Eruption DurationInterval
07 Sep 2019 @ 17587h 15m
07 Sep 2019 @ 104322h 28m
06 Sep 2019 @ 12159m
06 Sep 2019 @ 12064m 22h 34m
05 Sep 2019 @ 1332>30m 4m
05 Sep 2019 @ 13282m 21h 34m
04 Sep 2019 @ 15544d 5h 3m
31 Aug 2019 @ 105120h 40m
30 Aug 2019 @ 14117m
30 Aug 2019 @ 140420h 13m
29 Aug 2019 @ 17514d 9h 50m
25 Aug 2019 @ 080110m
25 Aug 2019 @ 07515m 4d 10h 14m
20 Aug 2019 @ 21372d 7h 11m
18 Aug 2019 @ 14263d 18h 51m
14 Aug 2019 @ 19351d 5h 47m
13 Aug 2019 @ 13481d 3h 22m
12 Aug 2019 @ 1026 ie21h 23m
11 Aug 2019 @ 1303 ie8d 20h 53m
02 Aug 2019 @ 16109m
02 Aug 2019 @ 1601~2m 1d 39m
01 Aug 2019 @ 15225h 3m
01 Aug 2019 @ 1019 ie5d 23m
27 Jul 2019 @ 09562d 3h 23m
25 Jul 2019 @ 06336m 4d 14h 36m
20 Jul 2019 @ 15571d 5h 23m
19 Jul 2019 @ 10346m 20s 20h 55m
18 Jul 2019 @ 1339 ie35d 5m
13 Jun 2019 @ 1334 ie1d 17h 59m
11 Jun 2019 @ 19357h 56m
11 Jun 2019 @ 11397h 52m 24m
11 Jun 2019 @ 1115 ie3d 22h 1m
07 Jun 2019 @ 13143h 35m
07 Jun 2019 @ 0939 ie4d 8m
03 Jun 2019 @ 0931 ie3d 20h 44m
30 May 2019 @ 124710m
30 May 2019 @ 123751m
30 May 2019 @ 114642m
30 May 2019 @ 110419h 37m
29 May 2019 @ 15271d 51m
28 May 2019 @ 14368m
28 May 2019 @ 14283m 13m
28 May 2019 @ 14158m 1d 26m
27 May 2019 @ 134922h 2m
26 May 2019 @ 1547290d 2h 19m
09 Aug 2018 @ 132813m
09 Aug 2018 @ 1315~5m 7m
09 Aug 2018 @ 1308~3m 2h 34m
09 Aug 2018 @ 1034 ie4d 18h 19m
04 Aug 2018 @ 1615 ie49d 2h 9m
16 Jun 2018 @ 14061h 9m
16 Jun 2018 @ 1257 ie2d 22h 32m
13 Jun 2018 @ 1425 ie2d 5m
11 Jun 2018 @ 1420 ie20h 50m
10 Jun 2018 @ 173035m
10 Jun 2018 @ 1655 ie8d 2h 14m
02 Jun 2018 @ 1441>4h 50m 10m
02 Jun 2018 @ 1431~4m 1h 46m
02 Jun 2018 @ 1245 ie156d 3h 0m
28 Dec 2017 @ 08455m
28 Dec 2017 @ 0840 ie4d 15h 59m
23 Dec 2017 @ 1641 ie98d 1h 9m
16 Sep 2017 @ 16321d 3h 20m
15 Sep 2017 @ 13125d 19h 37m
09 Sep 2017 @ 173520d 5h 59m
20 Aug 2017 @ 11369d 17h 47m
10 Aug 2017 @ 1749 ns4h 36m
10 Aug 2017 @ 1313~17m
10 Aug 2017 @ 125610m
10 Aug 2017 @ 1246~4m 3d 19h 15m
06 Aug 2017 @ 173110m
06 Aug 2017 @ 17213h 35m
06 Aug 2017 @ 1346<3h 29m 1h 23m
06 Aug 2017 @ 1223 ie16h 6m
05 Aug 2017 @ 2017~3m 1h 17m
05 Aug 2017 @ 1900 ie3d 22h 21m
01 Aug 2017 @ 203914m
01 Aug 2017 @ 2025~5m 10m
01 Aug 2017 @ 2015~5m 3d 22h 46m
28 Jul 2017 @ 2129~4m 10m
28 Jul 2017 @ 2119~4m 12m
28 Jul 2017 @ 2107~4m 12m
28 Jul 2017 @ 2055~4m 12m
28 Jul 2017 @ 2043~3.25m 16m
28 Jul 2017 @ 2027~5m 15m
28 Jul 2017 @ 2012~5m 13m
28 Jul 2017 @ 1959~4m 10m
28 Jul 2017 @ 1949~4m 3h 39m
28 Jul 2017 @ 16103h 32m 13m
28 Jul 2017 @ 15578m
28 Jul 2017 @ 1549~2m 1h 56m
28 Jul 2017 @ 1353 ie8d 2h 23m
20 Jul 2017 @ 113013d 2h 25m
07 Jul 2017 @ 0905 ie17d 23h 9m
19 Jun 2017 @ 09561d 21h 54m
17 Jun 2017 @ 12021d 22h 56m
15 Jun 2017 @ 13063d 17h 6m
11 Jun 2017 @ 200012m
11 Jun 2017 @ 1948~5m 3h 45m
11 Jun 2017 @ 1603 ie5h 15m

Interval Statistics

Interval Count100
Min4m
Max290d 2h 19m
Mean8d 4h 23m
Median20h 26m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
13893 06 Oct 2019 @ 0726 06 Oct 2019 @ 0753 jkgood Clep was off on arrival at 7:26- restarted 7:29/ stopped again ~7:34- back on 7:41
13880 04 Oct 2019 @ 1755 04 Oct 2019 @ 1835 Tara No pause in eruption during this time. When observed up close from 1800-1812, the eruption appeared normal, pool vent full and bursting, main vertical vent on strong and no steam vent activity or unusual sounds. Group seems to be in a stall but if Clepsydra was pausing, it was before my arrival.
13882 04 Oct 2019 @ 1345 --- Tara Approximate time that Clepsydra shut off for a pause. Water was high in Fountain, Clep side vent not full. Early in stall.
13691 14 Sep 2019 @ 1804 --- Tara Clepsydra off, viewed from the road
13620 07 Sep 2019 @ 1753 --- CraigC pause at 1753
13612 07 Sep 2019 @ 1038 --- William 10:38:22 paused
13597 06 Sep 2019 @ 1210 --- Graham Second pause of m after Fountain.
13596 06 Sep 2019 @ 1201 --- Graham Paused for 5m, 28m after Fountain quit.
13586 05 Sep 2019 @ 2110 --- William no pause after Fountain before I left at 21:10
13582 05 Sep 2019 @ 1330 --- Graham Second pause, d 2m.
13581 05 Sep 2019 @ 1323 --- Graham Paused for 5m, 15m after Fountain
13544 04 Sep 2019 @ 1549 --- Graham Paused for 5 min, 20m after Fountain.
13475 31 Aug 2019 @ 1045 --- steve Clep off at 1045
13465 30 Aug 2019 @ 1359 --- William paused by this time.
13452 29 Aug 2019 @ 1746 --- William paused
13382 25 Aug 2019 @ 0756 --- WillBoekel pause
13329 20 Aug 2019 @ 2132 --- Tara Start of pause.
13312 18 Aug 2019 @ 1425 --- Micah Kipple Paused.
13172 11 Aug 2019 @ 1911 --- JSJ Steam vent noisy from 1911-onward.
13059 05 Aug 2019 @ 1955 --- Stephen_Gemar Clep’s Side Vent appears to have broken off more of the sinter on the right side of its crater. The crater has expanded since my last viewing earlier today. CSV has been occasionally splashing during observation.
13025 04 Aug 2019 @ 1020 04 Aug 2019 @ 1250 Tara Steam vent first heard from top of stairs at 1020, continued on loudly for about 2 hours. At about 1220 I noticed the sound had gotten weaker, but the angled jet from the steam vent was still reaching 15-20 feet. Still making the audible "whoomp" sound as I left the area at 1250.
12968 02 Aug 2019 @ 1420 --- Tara Clepsydra steam vent on during dual, Morning quit 1 minute later.
12571 23 Jul 2019 @ 2340 24 Jul 2019 @ 0050 Tara Steam vent on from near the end of Morning through after the end of Fountain. Impressively loud and with angled jet left to right behind the main vertical jet, sometimes almost as tall as the vertical jet. As Fountain continued, it became more steam than water.
12532 19 Jul 2019 @ 1858 --- Tara Steam vent came on loudly, easily audible over strong wind & Fountain.
12431 10 Jul 2019 @ 1646 --- Micah Kipple Paused following fountain.
12405 07 Jul 2019 @ 0520 07 Jul 2019 @ 0600 LynnS Clepsydra stuttering—erupting from the back back vent only; bursts ranging in height from 3 to 25 feet high. Sometimes a few seconds between bursts.
12040 29 Jun 2019 @ 0430 29 Jun 2019 @ 0706 LynnS Clepsydra was coughing and had frequent pauses ranging from about 30 seconds to as long as 8 minutes during this time. It returned to normal activity at 0706.
12015 28 Jun 2019 @ 0740 28 Jun 2019 @ 0945 LynnS Frequent pauses with weak occasional bursts from one or two vents until it resumed regular activity st 0045 +/- t minutes
12016 28 Jun 2019 @ 0625 28 Jun 2019 @ 0740 LynnS Clepsydras steam vent was roaring loudly
11921 22 Jun 2019 @ 1548 22 Jun 2019 @ 1711 LynnS Frequent pauses and coughing until resumed normal eruptive behavior at 1711
11917 22 Jun 2019 @ 1445 22 Jun 2019 @ 1532 LynnS Steam vent started roaring almost the same time Morning started and quit almost the same time Fountain ended
11785 14 Jun 2019 @ 0935 --- User34 Side breakout occasionally bursting
11436 30 May 2019 @ 1241 --- Graham Paused
11435 30 May 2019 @ 1231 --- Graham Paused
11437 30 May 2019 @ 1139 --- Graham Pause till 1146
11434 30 May 2019 @ 1100 --- Graham Paused
11421 29 May 2019 @ 2328 --- Graham Steam vent chugging started during trifecta. Eent very loud and then back to chugging zteam vent at 0045.. Steam vent shutoff 0120. Clep very weak..
11417 29 May 2019 @ 1523 --- Graham Paused
11395 28 May 2019 @ 1431 --- Graham Paused.
11394 28 May 2019 @ 1423 --- Graham Paused again.
11393 28 May 2019 @ 1411 --- Graham Paused.
11380 27 May 2019 @ 1344 --- Micah Kipple Paused.
11365 26 May 2019 @ 1459 26 May 2019 @ 1502 Tara Clepsydra was off at 1459 when I came into view. It started having single bursts about 30 seconds later and came on fully at 1502.
13603 23 May 2019 @ 0638 23 May 2019 @ 1028 Ben VL I was chatting with a tour guide on our way out just before Fountain (about 2035), who said Clepsydra was off when he was there in the morning. Figure it is somewhere in this window.
11400 22 May 2019 @ 1820 22 May 2019 @ 1944 Ben VL Vent on the right went into loud steam phase at some point during the dual. Sounded like a supersonic jet flying overhead, just a little quieter. Steam phase died down and stopped not too long before Ftn quit.
11111 27 Apr 2019 @ 1530 --- Micah Kipple Paused.
10583 07 Oct 2018 @ 1854 --- Micah Kipple Seen off from road.
10555 04 Oct 2018 @ 1201 --- bbev Seen from the road: off. Back on at 1204
10533 02 Oct 2018 @ 1613 02 Oct 2018 @ 1659 William Paused from 16:13-16:46. Started playing with intermittent triangular blue bubbles with splashes between 1’-15’ while building and resumed normal behavior at 16:59.
10532 02 Oct 2018 @ 1221 --- cb Clepsydra was off when I drove past.
10388 19 Sep 2018 @ 2018 --- Siegmund Start of booming sound as one vent lost water / became intermittent during the long Fountain eruption.
10582 18 Sep 2018 @ 1439 --- Polly Hole to the right of Clepsydra having subterranean splashes - thin & 4-6".
10138 10 Sep 2018 @ 1940 --- Kyle briefly turned to steam and then cut off during fountain. was off after Fountain ended
10135 10 Sep 2018 @ 1350 --- Brian Clep made Noisy transition to steam at end of Morning’s eruption, steam phase continued through rest of Fountain
10001 03 Sep 2018 @ 1008 03 Sep 2018 @ 1010 cb Clepsydra is off as seen from the road,
9840 23 Aug 2018 @ 0638 --- JimS Shut down for 2 minutes.
8758 18 Jun 2018 @ 1102 --- bbev off at 1102
8631 11 Jun 2018 @ 0754 --- SteveO Off at 0754, did not drain so this is not the 1st off. Restart at 0758. Off at 0806, restart at 0808. Off at 0814, restart at 0817.
8329 28 May 2018 @ 1856 --- steve Clep was off at 1856, Pat saw it ie a few minutes earlier.
8288 24 May 2018 @ 1501 24 May 2018 @ 1506 Tara Clepsydra pause.
8268 22 May 2018 @ 1702 22 May 2018 @ 1745 jazzknick Off at shown time. Restart at 1709 off again at 1712. Restart 1720 off 1723 pattern continues through 1745. Blue bubble bursts at start ups. All of this just prior to Fountain start a few minutes later.
8138 10 May 2018 @ 1041 10 May 2018 @ 1042 billwarnock Not erupting.
7537 28 Sep 2017 @ 1907 28 Sep 2017 @ 1940 Kitt B off at 1907 for 4 minutes, 1918 for 2.5 minutes, 1929 for 3 minutes
7531 28 Sep 2017 @ 1907 --- Kitt B Clepsydra stopped erupting
7524 28 Sep 2017 @ 1739 --- billwarnock Was off at 1739 but restarted when I got to the south end of Fountain Flats.
7522 28 Sep 2017 @ 1544 --- Kitt B Clepsydra was not erupting at 1544.
5893 07 Sep 2017 @ 1815 --- LotusBaker it stopped, restarted 5 minutes later
5484 28 Aug 2017 @ 0800 28 Aug 2017 @ 1145 Maureen Clep steam seen on and off from GF during this time. Fairly sure these were Clep pauses.
5351 25 Aug 2017 @ 0826 25 Aug 2017 @ 1035 Brian 0826-0919 Clep's new vent empty with sporadic low splashes seen. Filled with Fountain's eruption, started a slow drain at end of Fountain. No boil or eruption from pool after fill started. Pool low but not empty by 1035. Clepsydra continuous until 0959, 12 minutes after FTN ended. Back on at 1004, off again at 1009. Started again at 1018, stayed on.
5194 21 Aug 2017 @ 1824 21 Aug 2017 @ 1828 nails Second post Fountain pause. Had a quick, strong restart.
5193 21 Aug 2017 @ 1812 21 Aug 2017 @ 1819 nails Post Fountain pause with a weak, slow restart. Took about two minutes to start strong jetting.
5176 20 Aug 2017 @ 1930 20 Aug 2017 @ 2039 CrisG On arrival, "Sidekick" vent was drained with occasional low slashing to just above crater edge noted. During Fountain, vent filled completely and no splashing noted. Did not stay after Fountain for Clepsydra pause.
5171 20 Aug 2017 @ 1131 --- CrisG stopped at 1131 after Fountain. "Sidekick" vent did not drain during or after Fountain - stayed a calm blue pool.
5406 10 Aug 2017 @ 1241 --- JSJ Clepsydra off at 1241 - start of post-Fountain pause # 1.
4677 01 Aug 2017 @ 2009 --- JSJ Off at 2009 - post-Fountain pause # 1.
4804 27 Jul 2017 @ 1527 --- Polly Clepsydra observed off from road.
4452 09 Jul 2017 @ 2007 --- Tara Pause in progress as seen from parking lot. Did not stay for restart.
4422 08 Jul 2017 @ 1043 --- Barbara Lasseter turned off at 1043 after 30minute 1004 Fountain eruption. I did not stay until it came on again
4414 07 Jul 2017 @ 0635 --- Barbara Lasseter off as I passed on the loop road
4396 02 Jul 2017 @ 1200 --- Kitt B off at 1200 and restarted at 1205
4388 01 Jul 2017 @ 2036 --- Graham Steam vent on
4389 01 Jul 2017 @ 2022 --- Graham Steam vent on 6m then tried to pause.
4390 01 Jul 2017 @ 2006 --- Graham Steam vent on for 7m.
4391 01 Jul 2017 @ 1940 --- Graham Steam vent on for 6m and then tried to pause.
4392 01 Jul 2017 @ 1900 --- Graham Steam vent on for 19m. afterwards Clepsydra tried to quit for 6 minutes but didn't quite make it and came back to normal.
4394 01 Jul 2017 @ 1115 --- Tara New vent stopped bursting when Fountain's runoff reached it; by 1115, it had risen from about a foot below the rim to full and was pulsating.
4350 22 Jun 2017 @ 2325 --- Tara Couldn't see new vent very well before Fountain due to steam, but after Fountain was finished the new vent was full and calm and Clepsydra got weaker. We did not stay for any pauses.
4321 15 Jun 2017 @ 1810 --- cb Clepsydra was off at 1809 as we drove past on our way to the UGB.
4305 12 Jun 2017 @ 1513 12 Jun 2017 @ 1525 LynnS Clepsydra was not in eruption at 1513, turned on and then turned off again.
4296 11 Jun 2017 @ 1038 --- cb Clepsydra and New thing (Newt) off @ 1038. Clepsydra front vent is on @ 1042. Front, back vent, and New thing (Newt) on @ 1049. Clepsydra off @ 1054 and we left the area.
4292 10 Jun 2017 @ 1325 10 Jun 2017 @ 1545 Tara Only change from 1125 note was a visible water level in the front vent at 1325. At 1348, the steam vent started and was on for about a minute, then Super Frying Pan started and it went back to splashing. The water level dropped in the front vent at about this time and after that it had only weak splashes. At 1415 the steam vent turned on and stayed on until at least 1545.
4291 10 Jun 2017 @ 1125 --- Tara Front vent and new vent both empty, top vent having brief stops with strong restarts but not full pauses.
4289 10 Jun 2017 @ 0722 --- LynnS Clepsydra turned off at 0722 and restarted at 0808. Clepsydra was still in eruption at 0846.
4288 10 Jun 2017 @ 0711 --- LynnS Clepsydra stopped at 0711. The stop was sudden. Clepsydra' back vent restarted at 0718. The front vent started splashing at 0719.
4270 08 Jun 2017 @ 1840 08 Jun 2017 @ 1900 Tara Clepsydra was pausing as seem from a distance. At about 1858, it came on and stayed on. System in stall, Fountain and Morning had high water levels.
4251 07 Jun 2017 @ 1658 07 Jun 2017 @ 2001 LynnS Clepsydra was cycling on/off for about 7 minutes off/7 minutes on from sometime before 1658. Byron Taylor reported Clepsydra kept having pauses until it resumed continuous activity at 2001.
4248 07 Jun 2017 @ 1001 --- billwarnock Off at 1001; new vent/pool also off. Main vent splashing again at 1009
4217 05 Jun 2017 @ 1508 --- novakg Clepsydra stopped after Fountain.
4206 04 Jun 2017 @ 1708 --- cb During Clepsydra's eruption New Thing (THAT NEEDS A NAME!) bursts up to 5 feet whereas when Clepsydra is off it has a rolling boil with small bursts.
4218 04 Jun 2017 @ 1428 --- Janet Jones Clepsydra shut down. 1435 - first splash seen, but didn't turn back on until 1439.
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.


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