Last Known Eruption
32d 16h 26m ago

Latest Eruptions

Eruption DurationInterval
22 Oct 2024 @ 114212d 22h 10m
09 Oct 2024 @ 13322d 3h 23m
07 Oct 2024 @ 1009 ie10d 19h 59m
26 Sep 2024 @ 1410 wc18m
26 Sep 2024 @ 1352 wc16d 23h 14m
09 Sep 2024 @ 1438 wc2d 21h 23m
06 Sep 2024 @ 17152d 5h 53m
04 Sep 2024 @ 112219m
04 Sep 2024 @ 110317h 48m
03 Sep 2024 @ 17151d 9h 10m
02 Sep 2024 @ 0805 ie18m
02 Sep 2024 @ 0747 ie20d 20h 13m
12 Aug 2024 @ 1134 wc2d 17h 9m
09 Aug 2024 @ 1825 wc53m
09 Aug 2024 @ 1732 wc21m
09 Aug 2024 @ 1711 wc2d 10h 11m
07 Aug 2024 @ 07002d 19h 38m
04 Aug 2024 @ 1122 ie10d 1h 14m
25 Jul 2024 @ 10084d 22h 33m
20 Jul 2024 @ 1135 wc21m
20 Jul 2024 @ 1114 ie wc17m
20 Jul 2024 @ 1057 wc17m
20 Jul 2024 @ 1040 wc18m
20 Jul 2024 @ 1022 wc39m
20 Jul 2024 @ 0943 wc57m
20 Jul 2024 @ 0846 wc55m
20 Jul 2024 @ 0751 wc21m
20 Jul 2024 @ 0730 wc17m
20 Jul 2024 @ 0713 wc17m
20 Jul 2024 @ 0656 wc4d 13h 37m
15 Jul 2024 @ 1719 ie wc4h 20m
15 Jul 2024 @ 1259 wc20m
15 Jul 2024 @ 1239 wc18m
15 Jul 2024 @ 1221 wc55m
15 Jul 2024 @ 1126 wc19m
15 Jul 2024 @ 1107 wc20m
15 Jul 2024 @ 1047 wc1d 3h 56m
14 Jul 2024 @ 06515d 23h 4m
08 Jul 2024 @ 0747 ie wc1d 1h 9m
07 Jul 2024 @ 06384d 21h 37m
02 Jul 2024 @ 0901 wc6d 18h 55m
25 Jun 2024 @ 1406 ie1d 6h 31m
24 Jun 2024 @ 0735 ie1d 13h 27m
22 Jun 2024 @ 1808 ie18m
22 Jun 2024 @ 17502d 20h 56m
19 Jun 2024 @ 2054 ie13h 5m
19 Jun 2024 @ 074914h 8m
18 Jun 2024 @ 17412d 12h 10m
16 Jun 2024 @ 05316d 17h 8m
09 Jun 2024 @ 12234h 20m
09 Jun 2024 @ 0803 ie2d 17h 18m
06 Jun 2024 @ 144520h 56m
05 Jun 2024 @ 17491d 7h 1m
04 Jun 2024 @ 1048 ie1h 32m
04 Jun 2024 @ 0916 ie1d 2h 3m
03 Jun 2024 @ 0713 ie wc9h 29m
02 Jun 2024 @ 2144 ie11h 22m
02 Jun 2024 @ 10225d 0m
28 May 2024 @ 1022 ie4d 3h 30m
24 May 2024 @ 0652 ie wc9d 16h 44m
14 May 2024 @ 14081d 5h 54m
13 May 2024 @ 0814 ie wc3d 18h 24m
09 May 2024 @ 135055m
09 May 2024 @ 12552d 21h 57m
06 May 2024 @ 14588h 19m
06 May 2024 @ 0639 ie wc15h 6m
05 May 2024 @ 15331d 3h 37m
04 May 2024 @ 1156 ie23h 54m
03 May 2024 @ 1202 wc3d 20h 46m
29 Apr 2024 @ 1516 ns17m
29 Apr 2024 @ 1459 ie1d 5h 56m
28 Apr 2024 @ 09034m 19s 18h 4m
27 Apr 2024 @ 14591d 49m
26 Apr 2024 @ 14104h 15m
26 Apr 2024 @ 0955 ie3d 14h 4m
22 Apr 2024 @ 1951 ie wc3d 5h 36m
19 Apr 2024 @ 14153d 6h 4m
16 Apr 2024 @ 0811 wc3d 20h 14m
12 Apr 2024 @ 1157 ns wc1d 4h 59m
11 Apr 2024 @ 0658 ns wc11h 18m
10 Apr 2024 @ 1940 ie wc1d 11h 52m
09 Apr 2024 @ 0748 ie wc12h 7m
08 Apr 2024 @ 1941 ie wc4d 11h 52m
04 Apr 2024 @ 0749 wc5d 23h 51m
29 Mar 2024 @ 0758 ie wc1d 16h 3m
27 Mar 2024 @ 1555 wc1d 4h 57m
26 Mar 2024 @ 1058 ie wc2d 19h 30m
23 Mar 2024 @ 1528 wc8d 2h 32m
15 Mar 2024 @ 1256 wc16d 6m
28 Feb 2024 @ 1150 wc6d 23h 41m
21 Feb 2024 @ 1209 wc21m
21 Feb 2024 @ 1148 wc3d 20h 35m
17 Feb 2024 @ 1513 wc5d 5h 59m
12 Feb 2024 @ 0914 ie wc17h 5m
11 Feb 2024 @ 1609 wc18m
11 Feb 2024 @ 1551 wc9d 6h 10m
02 Feb 2024 @ 0941 ie wc16m
02 Feb 2024 @ 0925 ie wc1h 51m
02 Feb 2024 @ 0734 ie wc2d 21h 53m
30 Jan 2024 @ 0941 ns wc4d 54m

Interval Statistics

Interval Count100
Min16m
Max20d 20h 13m
Mean2d 16h 49m
Median1d 4h 58m

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.