Last Known Eruption
2d 9h 33m ago

Latest Eruptions

Eruption DurationInterval
07 Dec 2023 @ 1503 wc2h 14m
07 Dec 2023 @ 1249 wc3d 4h 56m
04 Dec 2023 @ 0753 ie wc18h 54m
03 Dec 2023 @ 1259 wc3d 5h 29m
30 Nov 2023 @ 0730 ie wc1d 23h 7m
28 Nov 2023 @ 0823 ie wc3d 22h 55m
24 Nov 2023 @ 0928 ie wc22h 31m
23 Nov 2023 @ 1057 ie wc3h 57m
23 Nov 2023 @ 0700 ie wc2d 21h 22m
20 Nov 2023 @ 0938 ie wc1d 16h 5m
18 Nov 2023 @ 1733 wc40m
18 Nov 2023 @ 1653 wc1d 8h 6m
17 Nov 2023 @ 0847 wc19m
17 Nov 2023 @ 0828 ie wc16h 4m
16 Nov 2023 @ 1624 wc56m
16 Nov 2023 @ 1528 wc2h 46m
16 Nov 2023 @ 1242 wc16m
16 Nov 2023 @ 1226 wc4h 59m
16 Nov 2023 @ 0727 ie wc1d 19h 50m
14 Nov 2023 @ 1137 wc3h 30m
14 Nov 2023 @ 0807 wc23h 2m
13 Nov 2023 @ 0905 ie wc1h 31m
13 Nov 2023 @ 0734 wc07342d 18h 24m
10 Nov 2023 @ 1310 ie wc2h 12m
10 Nov 2023 @ 1058 wc17m
10 Nov 2023 @ 1041 wc3h 26m
10 Nov 2023 @ 0715 wc5d 18h 25m
04 Nov 2023 @ 1350 ie wc3d 1h 47m
01 Nov 2023 @ 1203 wc2d 4h 25m
30 Oct 2023 @ 0738 wc18h 54m
29 Oct 2023 @ 1244 ie20h 35m
28 Oct 2023 @ 1609 ie wc40m
28 Oct 2023 @ 1529 ie wc36m
28 Oct 2023 @ 1453 wc19m
28 Oct 2023 @ 1434 wc19m
28 Oct 2023 @ 1415 wc2h 31m
28 Oct 2023 @ 1144 wc39m
28 Oct 2023 @ 1105 wc36m
28 Oct 2023 @ 1029 wc19m
28 Oct 2023 @ 1010 wc18m
28 Oct 2023 @ 0952 wc15m
28 Oct 2023 @ 0937 ie wc21m
28 Oct 2023 @ 0916 ie wc20m
28 Oct 2023 @ 0856 wc17m
28 Oct 2023 @ 0839 wc20m
28 Oct 2023 @ 0819 wc19m
28 Oct 2023 @ 0800 ie wc16m
28 Oct 2023 @ 0744 ie wc2d 15h 8m
25 Oct 2023 @ 1636 ie wc1d 8h 26m
24 Oct 2023 @ 0810 ns wc21h 39m
23 Oct 2023 @ 1031 ns wc2h 35m
23 Oct 2023 @ 0756 ns wc2d 23h 52m
20 Oct 2023 @ 0804 ie wc1d 23h 1m
18 Oct 2023 @ 090320h 21m
17 Oct 2023 @ 1242 wc4h 3m
17 Oct 2023 @ 0839 wc17m
17 Oct 2023 @ 0822 wc1d 36m
16 Oct 2023 @ 0746 ie wc1d 17h 28m
14 Oct 2023 @ 1418 wc4h 1m
14 Oct 2023 @ 1017 wc19m
14 Oct 2023 @ 0958 wc1h 15m
14 Oct 2023 @ 0843 wc19m
14 Oct 2023 @ 0824 wc17m
14 Oct 2023 @ 0807 wc19m
14 Oct 2023 @ 0748 wc16m
14 Oct 2023 @ 0732 wc19m
14 Oct 2023 @ 0713 wc1d 22h 52m
12 Oct 2023 @ 0821 ie wc1d 23h 7m
10 Oct 2023 @ 0914 wc14h 41m
09 Oct 2023 @ 1833 ie wc1d 5h 28m
08 Oct 2023 @ 1305 wc19m
08 Oct 2023 @ 1246 wc17m
08 Oct 2023 @ 1229 wc17m
08 Oct 2023 @ 1212 ie wc1d 2h 13m
07 Oct 2023 @ 095922h 4m
06 Oct 2023 @ 1155 ie3d 4h 0m
03 Oct 2023 @ 0755 wc21h 54m
02 Oct 2023 @ 1001 ie wc1h 12m
02 Oct 2023 @ 0849 ns wc1h 30m
02 Oct 2023 @ 0719 ie wc1d 18h 9m
30 Sep 2023 @ 13106m 18m
30 Sep 2023 @ 12524m 4h 19m
30 Sep 2023 @ 0833 ie wc53m
30 Sep 2023 @ 0740 ie wc16h 16m
29 Sep 2023 @ 1524 ie wc1d 8h 17m
28 Sep 2023 @ 0707 ns wc1d 4m
27 Sep 2023 @ 0703 ie wc22h 43m
26 Sep 2023 @ 0820 wc3d 6m
23 Sep 2023 @ 0814 wc33m
23 Sep 2023 @ 0741 ie wc1d 27m
22 Sep 2023 @ 0714 ie wc21h 18m
21 Sep 2023 @ 0956 wc1h 2m
21 Sep 2023 @ 0854 wc16h 49m
20 Sep 2023 @ 1605 wc6h 46m
20 Sep 2023 @ 091920h 52m
19 Sep 2023 @ 1227 wc4h 35m
19 Sep 2023 @ 0752 ie wc16h 39m
18 Sep 2023 @ 1513 wc7h 54m
18 Sep 2023 @ 0719 wc19m
18 Sep 2023 @ 0700 ie wc3d 18h 46m

Interval Statistics

Interval Count100
Min15m
Max5d 18h 25m
Mean20h 11m
Median4h 27m

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.