Last Known Eruption
20d 18h 48m ago

Latest Eruptions

Eruption DurationInterval
29 Sep 2020 @ 19451d 35m
28 Sep 2020 @ 19102m 12m
28 Sep 2020 @ 18584m 6d 4h 58m
22 Sep 2020 @ 14004d 23h 9m
17 Sep 2020 @ 14519m
17 Sep 2020 @ 14424m 4h 47m
17 Sep 2020 @ 09554h 42m 13m
17 Sep 2020 @ 09425m 8m
17 Sep 2020 @ 09344m 10d 22h 56m
06 Sep 2020 @ 103812m
06 Sep 2020 @ 10265m 8m
06 Sep 2020 @ 10184m 9d 12h 27m
27 Aug 2020 @ 215114d 3h 22m
13 Aug 2020 @ 18294h 27m
13 Aug 2020 @ 14021h 12m
13 Aug 2020 @ 1250 ie2d 1h 13m
11 Aug 2020 @ 113710m
11 Aug 2020 @ 1127~4m 8m
11 Aug 2020 @ 111918m
11 Aug 2020 @ 1101 ie3d 3h 12m
08 Aug 2020 @ 07493d 18h 46m
04 Aug 2020 @ 13038m
04 Aug 2020 @ 12553h 52m
04 Aug 2020 @ 0903~3h 46m 11m
04 Aug 2020 @ 0852~5m 1d 19h 47m
02 Aug 2020 @ 130531d 3h 30m
02 Jul 2020 @ 093510m
02 Jul 2020 @ 09254m 1d 20h 46m
30 Jun 2020 @ 1239>16m 5h 9m
30 Jun 2020 @ 07305h 3m 8m
30 Jun 2020 @ 07224m 26d 8h 46m
03 Jun 2020 @ 22368m
03 Jun 2020 @ 22287h 28m
03 Jun 2020 @ 1500 ie9h 51m
03 Jun 2020 @ 0509 ie11h 59m
02 Jun 2020 @ 171010m
02 Jun 2020 @ 170010m
02 Jun 2020 @ 165011h 35m
02 Jun 2020 @ 0515 ie159d 15h 1m
25 Dec 2019 @ 1314108d 20h 16m
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

Interval Statistics

Interval Count100
Min4m
Max290d 2h 19m
Mean10d 1h 32m
Median20h 26m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16310 29 Sep 2020 @ 1933 --- Ajw Stopped erupting, 19m after Fountain ended
16301 28 Sep 2020 @ 1851 --- Ajw Turned off, while Spasm is erupting
16113 13 Sep 2020 @ 1115 --- TheHikingDude Around 11:15, during Fountain, Clepsydra had 5 bursts of around 50 feet or higher, some of the largest bursts I've seen from it.
16092 12 Sep 2020 @ 1707 12 Sep 2020 @ 1713 Dave W Pause of approximately 5.5 minutes. Off at 1707, back on at 1713.
15941 03 Sep 2020 @ 1530 03 Sep 2020 @ 1536 mhvogel Clepsydra off at 1530 and back on at 1536. Jet started at 1536
15769 28 Aug 2020 @ 1140 28 Aug 2020 @ 1222 deanl it was cycling on for 6-8 min and off for 4-5 min prior to Fountain start at 12:24. it continued for at least 15 min after Fountain stopped.
15919 27 Aug 2020 @ 2149 --- Tara Clepsydra off on arrival.
15703 23 Aug 2020 @ 1129 23 Aug 2020 @ 1206 aferrara Clepsydra slowed and shrank, but did not pause over this type period.
15632 17 Aug 2020 @ 1952 17 Aug 2020 @ 1957 William paused after Fountain
15587 15 Aug 2020 @ 1811 --- minissa Complete shutdown {23 min after cessation of Fountain}
15534 12 Aug 2020 @ 1056 --- mhvogel Clepsydra was off at 1056. One of the vents began to erupt at 1057.
15467 09 Aug 2020 @ 1115 09 Aug 2020 @ 1130 aferrara Grew weak and thready, short, but no pauses observed.
15461 08 Aug 2020 @ 0915 08 Aug 2020 @ 0950 LynnS Clepsydra is acting like a true geyser, turning on and off, then on and off again, at ABOUT four to six minute durations and length of pauses ABOUT four to six minutes. Clepsydra was active when Fountain started its eruption. As of 1045, Clepsydra had not yet paused again.
15459 08 Aug 2020 @ 0749 --- LynnS This restart was almost two hour and one-half hours after Fountain’s eruption ended.
15387 05 Aug 2020 @ 0553 --- LynnS Not in eruption
15103 25 Jul 2020 @ 1419 --- Yates Brief pause of about 30 seconds.
15092 23 Jul 2020 @ 2144 --- William paused for about 5m 30s
15059 20 Jul 2020 @ 2052 --- William paused for 4 m
14939 10 Jul 2020 @ 2128 --- William paused. Left during this pause.
14938 10 Jul 2020 @ 2119 --- William paused for 6m 47s
14937 10 Jul 2020 @ 2109 --- William paused for 6m 23s
14936 10 Jul 2020 @ 2100 --- William paused for 6m 20s
14935 10 Jul 2020 @ 2052 --- William paused for 7m 08s
14934 10 Jul 2020 @ 2038 --- William paused for 8m 40s
14933 10 Jul 2020 @ 2027 --- William paused for 7m53s
14932 10 Jul 2020 @ 2017 --- William paused for 4m 27s
14892 05 Jul 2020 @ 1917 --- CraigC pause 5mins
14865 03 Jul 2020 @ 0519 --- LynnS Clepsydra was off at 0519 when first observed. Clepsydra had one additional pause before resuming regular activity at 0530.
14860 02 Jul 2020 @ 1950 02 Jul 2020 @ 1955 steve Clep pause #2
14859 02 Jul 2020 @ 1938 02 Jul 2020 @ 1945 steve Clep pause
14723 24 Jun 2020 @ 1253 24 Jun 2020 @ 1259 William paused for 6m 15s
14722 24 Jun 2020 @ 1242 24 Jun 2020 @ 1248 William paused for 6.5m
14711 21 Jun 2020 @ 2218 21 Jun 2020 @ 2224 William Paused for 5 min 5 sec until back vent jetted to 20' and continued play, main vent on at 5 min 40sec.
14665 18 Jun 2020 @ 0756 18 Jun 2020 @ 1249 LynnS Clepsydra acted as a true geyser during this time, turning off and on 28 times. It turned on at the start of Fountain’s eruption at 1249 and remained on during Fountain’s eruption. As of 1340 Clepsydra had not paused after the end of the Fountain eruption that started at 1247.
14647 15 Jun 2020 @ 1842 --- ypcaribou as seen from road driving by - was not ie - paused
14630 13 Jun 2020 @ 1406 13 Jun 2020 @ 1407 William last minute of observed pause
14606 11 Jun 2020 @ 1916 11 Jun 2020 @ 1922 William paused during this time.
14541 05 Jun 2020 @ 0855 05 Jun 2020 @ 0900 William 2nd pause after Fountain
14540 05 Jun 2020 @ 0845 05 Jun 2020 @ 0849 William paused after Fountain
14459 31 May 2020 @ 0919 --- LynnS Clepsydra had a pause not associated with the end of an eruption of Fountain Geyser. Clepsydra was erupting as usual when it suddenly just stopped and remained off for several minutes.
14053 25 Dec 2019 @ 1309 --- Micah Kipple Paused
13997 02 Nov 2019 @ 1415 --- steve Clepsydra off at this time, I do not know when it shut off.
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.
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.