Last Known Eruption
4d 4h 32m ago

Latest Eruptions

Eruption DurationInterval
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>4h50m10m
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 @ 1313~4.25h17m
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<3h29m1h 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
11 Jun 2017 @ 10486m
11 Jun 2017 @ 104214h 28m
10 Jun 2017 @ 2014 ie2d 1h 16m
08 Jun 2017 @ 1858 A1d 8h 30m
07 Jun 2017 @ 102813m
07 Jun 2017 @ 101512h 23m
06 Jun 2017 @ 21523h 27m
06 Jun 2017 @ 18259m
06 Jun 2017 @ 18164h 29m
06 Jun 2017 @ 1347Several minutes16m
06 Jun 2017 @ 13317m 1h 27m
06 Jun 2017 @ 120420h 44m
05 Jun 2017 @ 15204h 13m
05 Jun 2017 @ 110715m
05 Jun 2017 @ 10524m
05 Jun 2017 @ 104817h 22m
04 Jun 2017 @ 17264m 9m
04 Jun 2017 @ 17174m 8m
04 Jun 2017 @ 17095m 2h 30m
04 Jun 2017 @ 143918h 4m
03 Jun 2017 @ 203511m
03 Jun 2017 @ 20244h 1m
03 Jun 2017 @ 162313m
03 Jun 2017 @ 1610~4m 1h 41m
03 Jun 2017 @ 14291h 28m 1h 47m
03 Jun 2017 @ 1242<1h 36m 1h 14m
03 Jun 2017 @ 112828m
03 Jun 2017 @ 1100 ie16h 14m
02 Jun 2017 @ 184610m
02 Jun 2017 @ 18364h 16m
02 Jun 2017 @ 14201d 22h 38m
31 May 2017 @ 15424d 2h 21m
27 May 2017 @ 13217h 26m
27 May 2017 @ 055519h 36m
26 May 2017 @ 101918h 35m
25 May 2017 @ 15441d 8h 24m
24 May 2017 @ 072010h 15m
23 May 2017 @ 210511m
23 May 2017 @ 205412m
23 May 2017 @ 20428h 39m
23 May 2017 @ 12034h 51m
23 May 2017 @ 071217h 13m
22 May 2017 @ 13593h 50m
22 May 2017 @ 100917h 19m
21 May 2017 @ 16508d 23h 38m
12 May 2017 @ 17125m
12 May 2017 @ 17075m
12 May 2017 @ 17026m
12 May 2017 @ 16566m
12 May 2017 @ 16505m

Interval Statistics

Interval Count100
Min4m
Max156d 3h 0m
Mean3d 23h 58m
Median3h 37m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.
4267 08 Jun 2017 @ 1730 --- LynnS Clepsydra was pausing from 1730 to 1745
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 White Clepsydra shut down. 1435 - first splash seen, but didn't turn back on until 1439.
4227 03 Jun 2017 @ 1948 --- Tara New vent filled with Fountain runoff, bursting slowed at 1949.
4228 03 Jun 2017 @ 1529 --- Tara New vent filled to rim with Fountain runoff, splashing slowed somewhat.
4229 03 Jun 2017 @ 1052 --- Tara New vent filled to rim with Fountain runoff, weaker splashing.
4179 02 Jun 2017 @ 1750 02 Jun 2017 @ 1920 Tara Clepsydra was getting slightly weaker around 1750 and paused completely for a few seconds just as Fountain rose to start its eruption at 1754. During Fountain Clepsydra's new vent filled with Fountain's runoff and was bursting from a high water level, and a smaller vent was visible sputtering to a few inches on its berm for a few minutes during Fountain. After Fountain, Clepsydra got weaker at 1827 and paused at 1828. The new vent turned off at 1829. Clepsydra was back on but weaker at 1836 and the new vent started splashing at 1837. Clepsydra paused again at 1840 but the new vent stayed on, continuing to splash. At 1846 Clepsydra came back on with a very strong start and stayed on at full force. The new vent got steadily stronger until the water level had recovered to a few inches below the rim at 1910. All during this time the new vent was throwing rocks and appeared to be enlarging its vent.
4176 01 Jun 2017 @ 1938 01 Jun 2017 @ 1947 Tara During Fountain's eruption, Clepsydra's new vent switched from fairly steady steamy jetting to weak splashing at 1938, then the splashing became thicker and steady at 1947.
4154 30 May 2017 @ 0747 --- cb off as we drove by at 747
4140 27 May 2017 @ 1313 --- Stephen_Gemar Off at 13:13. Started again at 13:21.
4128 23 May 2017 @ 2019 --- Tara 2019 Clepsydra new vent heavy steam and water mixed. 2027 Clepsydra front vent very weak. 2035 Clepsydra first pause, 2038 Clepsydra new vent quiet. 2040 Clepsydra weak splash. 2041 new vent splash. 2042 Clepsydra back on weakly. 2048 Clepsydra pause with new vent splashing weakly. 2054 Clepsydra back on strong, new vent steam and water mixed. 2100 Clepsydra pause in progress, did not get start of pause. 2105 Clepsydra back on strong, end of observations.
4127 23 May 2017 @ 1216 23 May 2017 @ 1811 SteveO Upper & back vents on, big lower main vent off, new vent off. Water start bursting from down low in the front big vent at 1222, last burst seen at 1235. Back vent started to rumble and roar at 1255, stopped roaring at 1259. Back vent intermittent rumbling and roaring at 1308, vents shut off for 3 to 5 seconds at 1311, 1313, 1315 & 1324. Back started continuous roaring at 1445, stopped roaring at 1453. 1753 small splashes barely visible in the front big vent. Front big vent and new vent started at 1811.
4125 23 May 2017 @ 1149 23 May 2017 @ 1207 billwarnock Clepsydra and new vent water off at 1151. Virtually no steam out of new vent at 1154. Clepsydra back on weakly at 1203 but nothing from new vent.
4115 22 May 2017 @ 1351 22 May 2017 @ 1359 Tara Clepsydra paused and drained. New vent went from all steam to weak water to completely off at 1352 and stayed off until Clepsydra restarted.
4114 22 May 2017 @ 1343 --- Tara New vent transitioned to mostly steam for the remainder of Fountain.
4112 21 May 2017 @ 1500 21 May 2017 @ 1653 SteveO Steam vent to the right & in front of Clepsydra erupting milky water 6" to 3' with ocassional spikes to 5'. Has built a small berm of gravel and rocks around the vent. Off with Clepsydra. Vent started weak splashes at 1653.
4111 20 May 2017 @ 1117 20 May 2017 @ 1250 SteveO Steam vent to the right and a little in front of Clepsydra was forceful steam from the time I arrived till I left after Fountain.
4105 20 May 2017 @ 1045 --- Tara A new (?) steam vent is active to the right (northeast) of Clepsydra, loud enough to be heard over Clepsydra. Clepsydra was on steady for the time I was in the area.
4066 06 May 2017 @ 1541 --- Maureen Seen paused at this time, not sure if that was the first pause.
4050 05 May 2017 @ 1921 --- Maureen Off at this time. Not sure if this was the first pause as I spent a few minutes at Silex.
4049 05 May 2017 @ 1500 05 May 2017 @ 1535 billwarnock I got to Fountain Flats pullout before 1500. Clepsydra was on and off until 1535 when I left. Jim Scheier was up at Fountain when I radioed and confirmed Clepsydra was off. I think Tara was there too. I phoned this info to Maureen when I got back to West. Others may post more later.
4047 05 May 2017 @ 1255 05 May 2017 @ 1305 Maureen Clepsydra was off, then on, then off again during the 10 minutes I observed it. Hmmmm.
4043 05 May 2017 @ 1136 --- billwarnock Clepsydra was OFF when I passed through Fountain Flats. Did not wait for restart.
4000 23 Apr 2017 @ 1429 --- Micah Kipple Pause.
4001 23 Apr 2017 @ 1421 --- Micah Kipple Pause.
3760 07 Oct 2016 @ 1841 07 Oct 2016 @ 1928 ARoe One pause during this time. Off at 1855. On again at 1858. Going strong.
3755 06 Oct 2016 @ 1348 --- KarenLow was off when I walked around FPP loop, we waited for start ( didn't get time) then it was off an hour later when I was heading past on road.
3739 01 Oct 2016 @ 1538 01 Oct 2016 @ 1620 Tara Clepsydra stopping and restarting weakly, front vent only. On 1538, off 1544, on 1547, off 1552, on 1554, off 1559, on 1602 with back vents, off 1606, on 1612
3539 24 Aug 2016 @ 1852 --- Tara off as seen from road.
3478 12 Aug 2016 @ 1719 12 Aug 2016 @ 1727 JSJ Third (of three) post-Fountain Clepsydra pause.
3477 12 Aug 2016 @ 1710 12 Aug 2016 @ 1715 JSJ Second (of three) post-Fountain Clepsydra pause.
3476 12 Aug 2016 @ 1700 12 Aug 2016 @ 1706 JSJ First (of three) post-Fountain Clepsydra pause.
3417 03 Aug 2016 @ 1029 --- JSJ Clepsydra already off.
3421 03 Aug 2016 @ 0913 --- Maureen Not erupting.
3136 21 Jun 2016 @ 1715 --- David mostly active between 17:15-17:21. photos on flickr: https://www.flickr.com/search/?user_id=93705139%40N00&sort=date-taken-desc&text=clepsydra&view_all=1
3024 09 Jun 2016 @ 1241 09 Jun 2016 @ 1246 JSJ Clepsydra post-Fountain pause (first of only one) at 1241. Pause done at 1246.
2977 05 Jun 2016 @ 1830 --- JSJ Clepsydra off. Second pause (of 2) after Fountain Geyser's eruption. In pause at 1830. Pause done at 1832.
2976 05 Jun 2016 @ 1818 --- JSJ Clepsydra off. First pause after Fountain Geyser's eruption. Pause from 1818 to 1823.
3655 26 May 2016 @ 1545 --- LynnS Clepsydra did not pause after the 1451 eruption of Fountain.
2808 01 May 2016 @ 1223 --- WillBoekel turned off
2754 17 Apr 2016 @ 1959 --- Siegmund Pause. Restart at 2004. Was weak and intermittent from 1949 to 1959.
2753 17 Apr 2016 @ 1946 --- Siegmund Pause. Restarted at 1949. (No previous pauses 1925-1946.)
2639 26 Dec 2015 @ 1523 --- Tara Clepsydra restart, seen from road.
2503 10 Oct 2015 @ 1818 --- Tara Steam vent noisily active
2342 13 Sep 2015 @ 1413 --- Tara Steam vent very loud through the rest of Fountain.
2323 11 Sep 2015 @ 2153 --- Micah Kipple It appears to be regaining full strength now, occasional loud bursts of steam from the back Vent. Ending my observations.
2324 11 Sep 2015 @ 2151 --- Micah Kipple Despite the fantastically long Fountain, clepsydra did not shut off completely. It was weak. But not off.
2216 29 Aug 2015 @ 1845 --- Micah Kipple Back Vent going to steam
1979 26 Jul 2015 @ 0608 --- Barbara Lasseter Clepsydra off as I passed on the loop road
1899 13 Jul 2015 @ 1041 --- Barbara Lasseter ended at 1041, restarted at 1048
1768 19 Jun 2015 @ 2155 --- Jake seen off. restart 2158
1625 23 May 2015 @ 0754 --- SteveO Off at o754, was not a fast noisey drain so not the 1st shut off. Restart at 0800.
2615 14 May 2015 @ 0947 14 May 2015 @ 1818 JSJ Clepsydra Geyser in eruption, as usual, at 0947, which continued until a brief post-Fountain pause occurred at 1129. The pause was immediately followed by intermittent eruptive activity, then a sustained eruption.
2616 14 May 2015 @ 1214 14 May 2015 @ 1216 JSJ Intermittent, brief low eruption from Clepsydra Geyser at 1214 after a 4th post-Fountain pause (which started at 1210). Brief pause at 1214. Another intermittent, brief, low eruption at 1215. Pause at 1216.
1131 16 Aug 2014 @ 1225 16 Aug 2014 @ 1828 Siegmund No pause after the 1225 nor 1828 Fountains.
1117 29 Jul 2014 @ 1357 --- udo Clep off at 1357.
1108 15 Jul 2014 @ 2141 --- Micah Kipple Off @ 2141
1106 13 Jul 2014 @ 0826 --- Graham Clepsydra shut off 0826 gazer report
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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