Last Known Eruption
1d 23h 20m ago

Latest Eruptions

Eruption DurationInterval
27 Jun 2022 @ 0659 ie wc20m
27 Jun 2022 @ 0639 ie wc11h 33m
26 Jun 2022 @ 19064h 19m
26 Jun 2022 @ 144717m
26 Jun 2022 @ 143018m
26 Jun 2022 @ 141219m
26 Jun 2022 @ 135317h 22m
25 Jun 2022 @ 203137m
25 Jun 2022 @ 19544h 58m
25 Jun 2022 @ 145618h 18m
24 Jun 2022 @ 2038 ie2d 13h 19m
22 Jun 2022 @ 0719 ns wc2d 24m
20 Jun 2022 @ 0655 ie wc21h 44m
19 Jun 2022 @ 0911 wc1h 13m
19 Jun 2022 @ 0758 ie wc1d 20h 25m
17 Jun 2022 @ 1133 ie16h 47m
16 Jun 2022 @ 1846 ie9h 8m
16 Jun 2022 @ 0938 ie wc1h 53m
16 Jun 2022 @ 0745 ie wc1d 9h 47m
14 Jun 2022 @ 215815h 36m
14 Jun 2022 @ 0622 ie wc2d 20h 16m
11 Jun 2022 @ 1006 ns19m
11 Jun 2022 @ 094719m
11 Jun 2022 @ 092820m
11 Jun 2022 @ 090817m
11 Jun 2022 @ 085119m
11 Jun 2022 @ 0832 ie14h 7m
10 Jun 2022 @ 1825 wc11h 52m
10 Jun 2022 @ 0633 ie wc18h 8m
09 Jun 2022 @ 1225 ie4h 57m
09 Jun 2022 @ 0728 ie wc2d 13h 19m
06 Jun 2022 @ 1809 ie22m
06 Jun 2022 @ 17473h 10m
06 Jun 2022 @ 1437 ie wc20h 39m
05 Jun 2022 @ 1758 ie21h 6m
04 Jun 2022 @ 2052 ie13h 16m
04 Jun 2022 @ 0736 ie wc14m
04 Jun 2022 @ 0722 ie wc16h 11m
03 Jun 2022 @ 151122h 29m
02 Jun 2022 @ 1642 ie3d 9h 16m
30 May 2022 @ 0726 ie3d 23h 40m
26 May 2022 @ 0746 ie2d 22m
24 May 2022 @ 0724 ie wc40m
24 May 2022 @ 064418m
24 May 2022 @ 0626 ie wc12h 39m
23 May 2022 @ 174717m
23 May 2022 @ 173020m
23 May 2022 @ 171019m
23 May 2022 @ 165119m
23 May 2022 @ 1632 ie8h 55m
23 May 2022 @ 0737 ie wc20h 36m
22 May 2022 @ 110118m
22 May 2022 @ 104320m
22 May 2022 @ 102319m
22 May 2022 @ 100420m
22 May 2022 @ 094418m
22 May 2022 @ 092619m
22 May 2022 @ 090718m
22 May 2022 @ 08491d 1h 3m
21 May 2022 @ 0746 ie wc20m
21 May 2022 @ 0726 ie wc15h 47m
20 May 2022 @ 15392h 11m
20 May 2022 @ 1328 ie wc1d 19h 10m
18 May 2022 @ 181820m
18 May 2022 @ 175819m
18 May 2022 @ 173941m
18 May 2022 @ 165819m
18 May 2022 @ 163919m
18 May 2022 @ 162019m
18 May 2022 @ 1601 ie1d 9h 0m
17 May 2022 @ 0701 ie wc15h 47m
16 May 2022 @ 1514 ie2d 5h 18m
14 May 2022 @ 0956 ie wc41m
14 May 2022 @ 0915 ie wc54m
14 May 2022 @ 0821 ie wc4d 43m
10 May 2022 @ 0738 ie wc2d 16h 35m
07 May 2022 @ 150318h 34m
06 May 2022 @ 2029 ie12h 37m
06 May 2022 @ 0752 ie wc2d 23h 20m
03 May 2022 @ 0832 ns wc15m
03 May 2022 @ 0817 ie wc23h 17m
02 May 2022 @ 0900 ie wc1d 21h 10m
30 Apr 2022 @ 1150 ns wc1h 49m
30 Apr 2022 @ 1001 ie wc1h 35m
30 Apr 2022 @ 0826 ie wc1h 16m
30 Apr 2022 @ 0710 ie wc3d 22h 17m
26 Apr 2022 @ 0853 ie wc54m
26 Apr 2022 @ 0759 ie wc19m
26 Apr 2022 @ 0740 ie wc3d 16h 27m
22 Apr 2022 @ 1513 wc4d 23h 0m
17 Apr 2022 @ 1613 ie2d 22h 52m
14 Apr 2022 @ 1721 ie wc2d 6h 37m
12 Apr 2022 @ 1044 ie wc2d 18h 52m
09 Apr 2022 @ 1552 wc1d 6h 55m
08 Apr 2022 @ 0857 ie wc4d 12m
04 Apr 2022 @ 0845 ie wc2d 35m
02 Apr 2022 @ 0810 ie wc17m
02 Apr 2022 @ 0753 ie wc1h 17m
02 Apr 2022 @ 0636 wc11h 49m
01 Apr 2022 @ 1847 ie wc9h 53m

Interval Statistics

Interval Count100
Min14m
Max4d 23h 0m
Mean20h 51m
Median9h 1m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
17837 15 Jun 2021 @ 1809 --- CrisG empty.
12906 31 Jul 2019 @ 1935 31 Jul 2019 @ 2024 JSJ Closed intervals for posted eruptions. Unlike previous years, no fill and drain cycles. Water level never visible.
11727 11 Jun 2019 @ 1638 --- CrisG Crater empty
11696 10 Jun 2019 @ 1002 --- CrisG empty crater
11656 08 Jun 2019 @ 1513 --- CrisG empty.
11528 02 Jun 2019 @ 0932 --- Janet Jones The wash from Marmot Cave cleared gravel fro the solid sinter base all the way under the boardwalk and down to the Dwarfs. I didn’t get a chance to sit and wait for an eruption, but that wash wasn’t there a couple weeks ago as far as I recall.
10902 24 Jan 2019 @ 0718 --- Graham Runoff channel snowed in
10897 23 Jan 2019 @ 0725 --- Graham No eruption recently. snow in runoff channel
10645 21 Oct 2018 @ 1132 --- rbwhitaker Water came up, small boiling, rocking pool, then dropped. No eruption. No bursts, anyway.
10440 25 Sep 2018 @ 1114 --- Micah Kipple Fill. Strong boil. Drain. No eruption.
10439 25 Sep 2018 @ 1103 --- Micah Kipple Fill. Boil. Drain. No eruption.
10381 19 Sep 2018 @ 1022 --- Siegmund Empty. Still empty 1104.
10246 16 Sep 2018 @ 0704 --- steve Rocking and overflowing followed by a drop but no splashing
10144 11 Sep 2018 @ 1043 --- Tara Water came up with pulsing overflow and bubbles for about 1 minute and then dropped.
10154 11 Sep 2018 @ 0905 --- Barbara Lasseter no visible water
10025 04 Sep 2018 @ 1629 --- Janet Jones 1629 - water rise. Sloshing and bouncing duriing a slower rise. 1630 - overflow with boilong but mo eruption. 1631 - drain.
10012 03 Sep 2018 @ 1429 --- Micah Kipple Heavy surge to 10" but no bursting. Maybe an eruption?
9530 07 Aug 2018 @ 1440 07 Aug 2018 @ 1443 JSJ Water rising at 1440. Pool pulsing with overflow, etc. No eruption. Water drained out-of-sight at 1443.
9529 07 Aug 2018 @ 1419 07 Aug 2018 @ 1422 JSJ Water rising at late 1419. Pool pulsing, overflow, light roiling. No eruption. Water drained out-of-sight at late 1421 to early 1422.
9528 07 Aug 2018 @ 1348 07 Aug 2018 @ 1400 JSJ Cycles involving rising water, pool pulsing with overflow, bubbling and low roiling, then water lowering out of sight: 1348 to 1350 (no eruption), 1359 to 1400 (no eruption). Closed interval for cycles: 11m.
9527 07 Aug 2018 @ 1151 07 Aug 2018 @ 1253 JSJ Cycles involving rising water, pool pulsing with overflow, bubbling and low roiling, then water lowering out of sight: 1151 to 1153, 1203 to 1205, 1213 to 1216, 1226 to 1228, 1239 to 1242, 1251 to 1253. Closed intervals for cycles: 12m, 10m, 13m, 13m, 12m.
9476 05 Aug 2018 @ 1458 --- Tara Pulsing, bubbling, and overflowing in progress. Water level dropped out of sight at 1459.
9362 01 Aug 2018 @ 0805 --- Barbara Lasseter crater empty
9345 31 Jul 2018 @ 1609 --- jazzknick Fluctuating overflow and rocking followed by drain. Small bubbling st front edge
9282 24 Jul 2018 @ 1607 --- WillBoekel empty.
8956 30 Jun 2018 @ 1623 --- Tara Bubbling with pulsing overflow.
8904 27 Jun 2018 @ 1249 27 Jun 2018 @ 1311 Tara Down about 3 inches at 1249, full at 1311.
8717 16 Jun 2018 @ 1125 --- CrisG full and overflowing
8656 13 Jun 2018 @ 1431 13 Jun 2018 @ 1433 Tara Pulsating and overflowing in progress at 1431, water level dropped out of sight at 1433.
8655 13 Jun 2018 @ 1359 --- Tara Crater empty.
8470 05 Jun 2018 @ 1915 --- underarockphoto Overflow reached.
8099 04 May 2018 @ 1144 --- Janet Jones No microbes growing in the overflow channel or in the vent. Water level at 3-4" below overflow.
3384 28 Jul 2016 @ 1027 --- WillBoekel empty. no water visible
3241 07 Jul 2016 @ 1306 --- udo drained
2909 28 May 2016 @ 1550 --- WillBoekel down 1 inch
2773 22 Apr 2016 @ 1006 --- WillBoekel down about 4 inches
2135 16 Aug 2015 @ 1010 16 Aug 2015 @ 1053 JSJ Full & slightly pulsing at 1010. Stronger pulsing with overflow from 1012 to 1016. Drain at 1016. Noticed it was full at 1053.
2072 09 Aug 2015 @ 1001 --- JSJ Pool full.
1996 31 Jul 2015 @ 1027 --- Tara pulsing and bubbling in progress
1987 29 Jul 2015 @ 1319 --- Tara Pulsing and bubbling with overflow. I saw it in progress and it lasted only a few more seconds before the water level dropped nearly out of sight.
1917 16 Jul 2015 @ 1956 --- Jake empty.
1862 07 Jul 2015 @ 1512 --- Micah Kipple Empty.
1785 23 Jun 2015 @ 1913 --- bhoppe empty at 1913
1777 22 Jun 2015 @ 1921 --- WillBoekel about 3 inches below overflow
1773 21 Jun 2015 @ 1130 --- udo Pulsed for several minutes and drained at 1130
1759 18 Jun 2015 @ 1632 --- WillBoekel empty.
1746 16 Jun 2015 @ 1314 --- bhoppe empty at 1314
1737 14 Jun 2015 @ 1140 --- WillBoekel half full
1736 14 Jun 2015 @ 0921 --- WillBoekel empty.
1697 07 Jun 2015 @ 1639 --- WillBoekel empty.
1206 03 Jun 2014 @ 1219 03 Jun 2014 @ 1220 JSJ Marmot Cave Geyser's vent was filled with water & was bouncing slightly at 1219 on 3 June 2014.  The pool completely drained at 1220.
1059 03 May 2014 @ 2049 --- WillBoekel 2049 resume overflow
1057 03 May 2014 @ 2020 --- WillBoekel At 2020 water was ~3-4 inches below overflow
1056 02 May 2014 @ 1529 --- WillBoekel Drained at 1529 water seen refilling at 1530 and possible suds on the pool upon refill
761 04 Jun 2011 @ 1422 --- Janet Jones Marmot Cave Geyser\r\n1420 - water level dropped below overflow.\r\n1422 - pulsing, still below overflow.\r\n1426 - water level back to overflow \r\n1428 - left the area
16763 30 Oct 1998 @ 1037 --- JarnoO surging, not actual erupt
16700 15 Aug 1998 @ 0836 --- JarnoO low pool
16688 15 Jul 1998 @ 0000 15 Jul 1998 @ 2359 JarnoO active
16687 14 Jul 1998 @ 0000 14 Jul 1998 @ 2359 JarnoO across from Arrowhead Spring: active all day
16646 26 May 1998 @ 0000 26 May 1998 @ 2359 JarnoO UNNG across from Arrowhead; active
16605 18 Mar 1998 @ 0000 18 Mar 1998 @ 2359 JarnoO UNNG below Inverted; active
EntrySourceLinkComment
07 Aug 2018 @ 1339 JSJ https://www.youtube.com/watch?v=QQIW13aaXSw#t=12m38s Clip 23 of this video compilation (time stamp 12:38 to 14:23) shows Marmot Cave Geyser's 1:39 to 1:40 PM eruption on 7 August 2018 during a fill-and-drain cycle.
07 Aug 2018 @ 1330 JSJ https://www.youtube.com/watch?v=QQIW13aaXSw#t=10m42s Clip 22 of this video compilation (time stamp 10:42 to 12:38) shows Marmot Cave Geyser's 1:30 to 1:32 PM eruption on 7 August 2018 during a fill-and-drain cycle.
07 Aug 2018 @ 1322 JSJ https://www.youtube.com/watch?v=QQIW13aaXSw#t=8m29s Clip 21 of this video compilation (time stamp 8:29 to 10:42) shows Marmot Cave Geyser's 1:22 to 1:23 PM eruption on 7 August 2018 during a fill-and-drain cycle.
07 Aug 2018 @ 1303 JSJ https://www.youtube.com/watch?v=QQIW13aaXSw#t=7m30s Clip 20 of this video compilation (time stamp 7:30 to 8:29) shows Marmot Cave Geyser's 1:03 PM eruption on 7 August 2018 during a fill-and-drain cycle.
Baseline does not exist.