Last Known Eruption
2d 3h 54m ago

Latest Eruptions

Eruption DurationInterval
01 Aug 2021 @ 17358d 12h 5m
24 Jul 2021 @ 0530 ie10d 13h 35m
13 Jul 2021 @ 155512m
13 Jul 2021 @ 154310d 22h 20m
02 Jul 2021 @ 172312m
02 Jul 2021 @ 17114m 7m
02 Jul 2021 @ 1704 ns5h 18m
02 Jul 2021 @ 11465h 12m 9m
02 Jul 2021 @ 11374m 1d 18h 30m
30 Jun 2021 @ 17079m
30 Jun 2021 @ 16583m 8m
30 Jun 2021 @ 16503m 7d 4h 58m
23 Jun 2021 @ 1152 A7d 1h 12m
16 Jun 2021 @ 104010m
16 Jun 2021 @ 10303m 18h 45m
15 Jun 2021 @ 15451d 3h 16m
14 Jun 2021 @ 1229 ns2d 2h 21m
12 Jun 2021 @ 100811m
12 Jun 2021 @ 09572d 13h 39m
09 Jun 2021 @ 201811m
09 Jun 2021 @ 2007<6m 10m
09 Jun 2021 @ 19575m 5h 8m
09 Jun 2021 @ 14495h 3m 10m
09 Jun 2021 @ 14394m 5h 0m
09 Jun 2021 @ 09394h 53m 18h 29m
08 Jun 2021 @ 151010m
08 Jun 2021 @ 15004m 2d 22h 59m
05 Jun 2021 @ 16015h 25m
05 Jun 2021 @ 10365h 19m 1d 15h 11m
03 Jun 2021 @ 19259m
03 Jun 2021 @ 19163m 6h 32m
03 Jun 2021 @ 12446h 26m 8m
03 Jun 2021 @ 12364m 1h 33m
03 Jun 2021 @ 1103 ie1d 21h 39m
01 Jun 2021 @ 132418h 7m
31 May 2021 @ 1917>17m 8m
31 May 2021 @ 19093m 1d 45m
30 May 2021 @ 1824>20m 11m
30 May 2021 @ 18134m 9m
30 May 2021 @ 18044m 11h 40m
30 May 2021 @ 0624>22m 2d 19h 31m
27 May 2021 @ 1053 ie9d 19h 10m
17 May 2021 @ 154320h 3m
16 May 2021 @ 19409m
16 May 2021 @ 19314d 3h 15m
12 May 2021 @ 161618d 23h 6m
23 Apr 2021 @ 1710205d 21h 25m
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

Interval Statistics

Interval Count100
Min4m
Max205d 21h 25m
Mean7d 2h 50m
Median7h 21m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
18774 01 Aug 2021 @ 0949 01 Aug 2021 @ 1049 am In a pause when I arrived. Multiple other pauses and restarts before I had to leave while it was in yet another pause
18760 31 Jul 2021 @ 1457 31 Jul 2021 @ 1540 LynnS Clepsydra was off when i first observed ot. Between 1457 and 1540, four Clepsydra pauses were observed.
18613 23 Jul 2021 @ 1950 23 Jul 2021 @ 2004 JeffL in a pause at this time. unsure when exact start of pause was. noticed it was in pause at approx. 1950 when driving by
18375 11 Jul 2021 @ 1941 11 Jul 2021 @ 2019 BrandonC Pause 20 mins after fountain ended at 2001 start 2007 pause 2011 start 2017
18317 09 Jul 2021 @ 0826 --- cb Off as we drove around the corner at Fountaun flats. back on at 0828.
18311 08 Jul 2021 @ 0752 --- Barbara Lasseter Turned off. On again 0755.
18240 02 Jul 2021 @ 1715 --- Graham Third pause after Fountain.
18241 02 Jul 2021 @ 1706 --- Graham Second pause after Fountain.
18242 02 Jul 2021 @ 1658 --- Graham Paused 13m after Fountain.
18243 02 Jul 2021 @ 1141 --- Graham Second observed pause.
18246 02 Jul 2021 @ 1132 --- Graham Paused. Fountain runoff wet. Likely first pause after Fountain as it was on strong before pausing.
18202 30 Jun 2021 @ 1701 --- Graham Third pause after Fountain.
18203 30 Jun 2021 @ 1653 --- Graham Second pause after Fountain.
18204 30 Jun 2021 @ 1645 --- Graham Paused 14m after Fountain.
18254 29 Jun 2021 @ 1725 29 Jun 2021 @ 1925 Tara Clepsydra seen off from road 1725. Also off upon arrival at 1732, on time not noted, then off at 1739, on 1744, off 1749, on 1754, off 1757, on 1801, off 1807, on 1812 with Fountain start, then off before 1816 and remained off during the entirety of Fountain's eruption. Fountain quit 1837, Clepsydra's front vent was full, then dropped a few inches, then rose again before beginning to restart at 1859. Various vent combinations started and stopped from 1859 to 1925 with the greatest activity from the front pool vent, which had blue bubble bursts reaching 20-25 feet. Pauses with all vents off were under a minute long.
18059 23 Jun 2021 @ 1145 --- Graham Paused 25m after Fountain quit.
17846 16 Jun 2021 @ 1033 --- Graham Second pause after Fountain.
17847 16 Jun 2021 @ 1022 --- Graham Paused 12m after Fountain.
17809 15 Jun 2021 @ 1537 --- Graham Paused 16m after Fountain.
17771 14 Jun 2021 @ 1226 --- wteach Clepsydra is off, seen from road
17773 14 Jun 2021 @ 1212 --- LynnS First pause after the end of Fountain started at 1212
17749 13 Jun 2021 @ 1603 --- Craigmon99 Off. Seen from road.
17737 12 Jun 2021 @ 2122 12 Jun 2021 @ 2124 William paused
17736 12 Jun 2021 @ 2113 12 Jun 2021 @ 2117 William paused
17735 12 Jun 2021 @ 2102 12 Jun 2021 @ 2106 William forceful restart
17733 12 Jun 2021 @ 2057 12 Jun 2021 @ 2059 William paused
17711 12 Jun 2021 @ 1007 --- bbev pause in eruption
17710 12 Jun 2021 @ 0955 --- bbev pause in eruption
17713 12 Jun 2021 @ 0934 --- bbev pause seen from road.
17615 09 Jun 2021 @ 2013 --- Graham 3rd pause in progress.
17616 09 Jun 2021 @ 2002 --- Graham Second pause after Fountain.
17617 09 Jun 2021 @ 1952 --- Graham Paused 27m after Fountain.
17619 09 Jun 2021 @ 1443 --- Graham 2nd pause after Fountain.
17620 09 Jun 2021 @ 1432 --- Graham Paused 19m after Fountain.
17621 09 Jun 2021 @ 0933 --- Graham Paused 15m after Fountain.
17581 08 Jun 2021 @ 1504 --- Graham Second pause after Fountain.
17582 08 Jun 2021 @ 1453 --- Graham Paused 15m after Fountain
17585 08 Jun 2021 @ 0835 --- Graham Clepsydra pause around this time, 3 pauses.
17495 05 Jun 2021 @ 2101 --- Tara first pause, seen from road. Did not stay for restart
17482 05 Jun 2021 @ 1555 --- Graham Paused 16m after Fountain.
17483 05 Jun 2021 @ 1029 --- Graham First pause 18m after Fountain
17412 03 Jun 2021 @ 1919 --- Graham Second pause after Fountain.
17413 03 Jun 2021 @ 1910 --- Graham First pause, 27m after Fountain. Clep had looked weak after Fountain but got stronger and I nearly left after 25 minutes and then it dropped right down and quit at 27.
17414 03 Jun 2021 @ 1240 --- Graham Second pause after Fountain.
17415 03 Jun 2021 @ 1232 --- Graham Paused first time 22m after Fountain quit.
17403 03 Jun 2021 @ 0650 --- KHoward Had not yet paused and still going strong when we left
17344 01 Jun 2021 @ 1320 --- Graham Paused, second time after Fountain.
17319 31 May 2021 @ 1912 --- Graham Secomd pause after Fountain.
17320 31 May 2021 @ 1903 --- Graham Paused 14m after Fountain quit.
17317 30 May 2021 @ 1817 --- Graham Third pause after Fountain.
17318 30 May 2021 @ 1808 --- Graham Second pause after Fountain.
17288 30 May 2021 @ 1758 --- Graham Paused 13m after Fountain quit.
17261 30 May 2021 @ 0619 --- Graham Paused 14m after Fountain quit.
17203 27 May 2021 @ 1547 27 May 2021 @ 1601 bbev 1547 clepsydra pause, on at 1551, another pause at 1556 and on again at 1601. Reports that there were several other pauses during this fountain interval.
17221 27 May 2021 @ 1200 27 May 2021 @ 1525 JSJ Numerous Clepsydra pauses and restarts between today's two Fountain Geyser eruptions. Couldn't record all details. Noticed intermittent splashing/spouting (= trying to turn on) at 1200 and 1212. On at 1213; recently off at 1217. On at 1225; recently off at 1232. Eruption from 1237 to 1242. On again at 1251; recently off at 1254. Eruption from 1301 to 1304. On or near start at 1314; off at 1316. On at 1322; already off at 1328.On at 1333; recently off at 1338. Near start at 1344, then off. Eruptions at 1350-1352 and 1357-1359. Intermittent splashing/spouting (trying to turn on) at 1401. On (stronger/more persistent) at 1405. Intermittent splashing at 1408; already off at 1410, then more intermittent splashing. On at 1412; already off at 1416. Intermittent splashing at 1417; already off at 1421, then more intermittent splashing at 1421. On at 1422; already off at 1427. Intermittent erupting at 1429; eruption from 1430 to 1433. Intermittent erupting at 1435; eruption from 1436 to 1439. Intermittent erupting at 1442; eruption from 1443 to 1446. Intermittent erupting at 1449; eruption from 1451 to 1454. Intermittent erupting at 1457; on at 1458; already off at 1503. Intermittent erupting at 1507; on at 1508; already off at 1512. Intermittent erupting at 1512; on at 1514; already off at 1520. On at 1525. Did not record start of Clepsydra's "perpetual spouting" as next Fountain Geyser eruption neared.
17145 19 May 2021 @ 1813 --- Ajw Stopped erupting. Resumed 1818. Stopped again 1821. Resumed again 1822.
17132 17 May 2021 @ 1538 --- Skookum Activity stopped at 1538
17059 12 May 2021 @ 1611 --- Ajw Turned off
16793 27 Dec 2020 @ 1103 --- Micah Kipple Another pause
16792 27 Dec 2020 @ 1053 --- Micah Kipple Pause in progress
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.
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.