Last Known Eruption
15h 43m ago

Latest Eruptions

Eruption DurationInterval
17 Aug 2025 @ 17043d 4h 52m
14 Aug 2025 @ 12123m 29s 2d 3h 41m
12 Aug 2025 @ 08313.5m 1d 54m
11 Aug 2025 @ 0737 ns wc17h 35m
10 Aug 2025 @ 1402 ns23h 44m
09 Aug 2025 @ 1418~5m 1d 7h 42m
08 Aug 2025 @ 0636 wc14h 38m
07 Aug 2025 @ 1558 wc23h 42m
06 Aug 2025 @ 16162m 55s 1d 23h 29m
04 Aug 2025 @ 1647 wc1d 10h 11m
03 Aug 2025 @ 0636 wc22h 3m
02 Aug 2025 @ 083311h 18m
01 Aug 2025 @ 21153m 15s 1d 9h 53m
31 Jul 2025 @ 11223m 20s 23h 5m
30 Jul 2025 @ 12173.5m 15h 46m
29 Jul 2025 @ 2031 wc1d 8h 33m
28 Jul 2025 @ 11583d 2h 53m
25 Jul 2025 @ 09051d 19h 29m
23 Jul 2025 @ 1336 wc2½m2d 50m
21 Jul 2025 @ 12461d 16h 54m
19 Jul 2025 @ 1952 wc1d 5h 33m
18 Jul 2025 @ 1419 wc16h 56m
17 Jul 2025 @ 21231d 12h 52m
16 Jul 2025 @ 0831 wc1d 11h 5m
14 Jul 2025 @ 21264m 13h 29m
14 Jul 2025 @ 0757 ie10h 31m
13 Jul 2025 @ 2126 ie wc2d 9h 29m
11 Jul 2025 @ 1157 wc21h 57m
10 Jul 2025 @ 14003d 4h 40m
07 Jul 2025 @ 0920 wc1d 16h 7m
05 Jul 2025 @ 17133m 18s 1d 8h 55m
04 Jul 2025 @ 0818 wc17h 44m
03 Jul 2025 @ 14341d 4h 3m
02 Jul 2025 @ 1031 wc18h 35m
01 Jul 2025 @ 155620h 14m
30 Jun 2025 @ 194211h 6m
30 Jun 2025 @ 0836 wc11h 33m
29 Jun 2025 @ 2103 wc9h 48m
29 Jun 2025 @ 1115 ie9d 11h 49m
19 Jun 2025 @ 23269h 50m
19 Jun 2025 @ 13362d 1h 6m
17 Jun 2025 @ 1230 ie wc17h 29m
16 Jun 2025 @ 1901 ns wc1d 10h 2m
15 Jun 2025 @ 0859 wc12h 43m
14 Jun 2025 @ 2016 wc2d 3h 58m
12 Jun 2025 @ 16181d 49m
11 Jun 2025 @ 1528:073m 42s 1d 19h 50m
09 Jun 2025 @ 1938 ie8h 15m
09 Jun 2025 @ 1123 ie13h 1m
08 Jun 2025 @ 222214h 41m
08 Jun 2025 @ 074114h 21m
07 Jun 2025 @ 17203m 7s 10h 28m
07 Jun 2025 @ 0652 wc1d 37m
06 Jun 2025 @ 0615 ie wc1d 10h 19m
04 Jun 2025 @ 1956 wc9h 42m
04 Jun 2025 @ 10143m 16s 22h 1m
03 Jun 2025 @ 12133m 41s 1d 1h 39m
02 Jun 2025 @ 1034 ? ie18h 39m
01 Jun 2025 @ 15553m 29s 9h 21m
01 Jun 2025 @ 063410h 42m
31 May 2025 @ 19523m 47s 1d 6h 49m
30 May 2025 @ 13033m 47s 7h 32m
30 May 2025 @ 05313m 15s 13h 32m
29 May 2025 @ 15593m 39s 9h 36m
29 May 2025 @ 06233m 28s 10h 7m
28 May 2025 @ 20163m 38s 1d 7h 43m
27 May 2025 @ 12333m 26s 1d 1h 4m
26 May 2025 @ 11293m 17s 1d 19h 16m
24 May 2025 @ 16133m 42s 23h 58m
23 May 2025 @ 16153m 32s 22h 26m
22 May 2025 @ 17493m 32s 7h 51m
22 May 2025 @ 09583m 28s 1d 20h 5m
20 May 2025 @ 1353 ns2d 4h 41m
18 May 2025 @ 09121d 23h 35m
16 May 2025 @ 09372m 58s 1d 1h 27m
15 May 2025 @ 0810 wc12h 41m
14 May 2025 @ 19293m 18s 13h 31m
14 May 2025 @ 0558 wc1d 39m
13 May 2025 @ 0519 ie wc10h 26m
12 May 2025 @ 185311h 53m
12 May 2025 @ 0700 A16h 24m
11 May 2025 @ 14363m 10s 16h 27m
10 May 2025 @ 22091d 5h 6m
09 May 2025 @ 17033m 30s 1d 1h 54m
08 May 2025 @ 15093m 2s 22h 55m
07 May 2025 @ 16143m 45s 1d 8m
06 May 2025 @ 16063m 34s 1d 10h 14m
05 May 2025 @ 05523m 18s 21h 56m
04 May 2025 @ 07563m 45s 22h 10m
03 May 2025 @ 09464m 19h 1m
02 May 2025 @ 14454m 1d 32m
01 May 2025 @ 141320h 37m
30 Apr 2025 @ 17362d 7h 48m
28 Apr 2025 @ 094820h 58m
27 Apr 2025 @ 12501d 1h 21m
26 Apr 2025 @ 112919h 32m
25 Apr 2025 @ 15574m 1d 20h 50m
23 Apr 2025 @ 19077h 15m
23 Apr 2025 @ 115221h 52m
22 Apr 2025 @ 14001d 4h 59m

Interval Statistics

Interval Count100
Min7h 15m
Max9d 11h 49m
Mean1d 4h 24m
Median23h 23m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
41140 18 Aug 2025 @ 0645 --- K.Cooper gurgling
41095 15 Aug 2025 @ 1103 --- Kyle gurgling with the vent, occasional splashing as high as 3 ft+ No eruption by 1205. quiet at that. ceased observation. no Sawmill eruption yet Twilight still not overflowing spasmodic has not resumed
41023 12 Aug 2025 @ 0757 --- EmilyW Deep drain in sawmill complex, gurgling and noticeable water level.
40952 10 Aug 2025 @ 1340 --- Tara steady light gurgling, no water seen
40865 06 Aug 2025 @ 1537 --- K.Cooper splashing
40762 02 Aug 2025 @ 2240 --- K.Cooper failed
40732 01 Aug 2025 @ 1944 --- bhoppe Sawmill Complex in deep drain. Uncertain steaming lightly. Sawmill was still on as of ~1900
40708 31 Jul 2025 @ 1114 --- rayceanderson Gurgling and splashing
40700 30 Jul 2025 @ 1145 --- deanl gurgling - saw 1st splash 1154
40680 28 Jul 2025 @ 1122 28 Jul 2025 @ 1139 deanl almost constant gurgling but no splashes yet. Sawmill erupted for about 30 seconds and Uncertain went quiet. first splashes from Uncertain 1148.
40589 25 Jul 2025 @ 0714 --- rayceanderson Gurgling and splashing
40539 21 Jul 2025 @ 1113 --- User34 Splashing
40267 06 Jul 2025 @ 2239 --- Delta4Heavy85 gurgling
40216 04 Jul 2025 @ 1550 --- K.Cooper splashing
40214 04 Jul 2025 @ 1540 --- K.Cooper Light gurgling
39930 19 Jun 2025 @ 1233 --- rayceanderson Gurgling and splashing
39904 16 Jun 2025 @ 1859 --- ltgangi steaming
39891 15 Jun 2025 @ 1730 15 Jun 2025 @ 1810 User34 Intermittent steam and gurgling, but no water seen
39810 12 Jun 2025 @ 0733 --- Suzanne post eruptive: in steam phase
39802 11 Jun 2025 @ 1415 --- Kyle gurgling and steaming lightly
39734 08 Jun 2025 @ 2106 --- Dan A Water pooling
39720 07 Jun 2025 @ 1553 --- Kyle light steam, gurgling. no splashing
39662 05 Jun 2025 @ 0748 --- SteveO Gurgling.
39649 04 Jun 2025 @ 0830 04 Jun 2025 @ 0839 SteveO Gurgling. 1st water seen at 0839.
39635 03 Jun 2025 @ 1026 03 Jun 2025 @ 1056 SteveO Lightly gurgling at 1026. 1st water seen at 1056.
39630 02 Jun 2025 @ 1240 --- SteveO About 1240 Uncertain started hucking water up increasing to quite frequent to almost constant. Then decreasing rapidly. Uncertain went to heavy steam but not forceful. Also could hear boiling at depth.
39621 02 Jun 2025 @ 1041 --- Dan A Gurgling and splashing
39619 01 Jun 2025 @ 1533 --- SteveO Gurgling and splashing.
39602 01 Jun 2025 @ 0509 01 Jun 2025 @ 0603 SteveO Gurgling. 1st water seen at 0603.
39580 31 May 2025 @ 1920 --- SteveO Gurgling. Pooling at 1942.
39531 30 May 2025 @ 1750 30 May 2025 @ 1813 SteveO Gurgling. 1st water seen at 1813.
39525 30 May 2025 @ 1124 --- SteveO Gurgling. Gurgling and splashing 1146.
39511 30 May 2025 @ 0451 30 May 2025 @ 0508 SteveO Gurgling. 1st water seen at 0508.
39465 29 May 2025 @ 1412 29 May 2025 @ 1418 SteveO Gurgling. 1st water seen at 1418.
39453 29 May 2025 @ 0514 29 May 2025 @ 0542 SteveO Gurgling. 1st water seen at 0542.
39445 28 May 2025 @ 1850 --- SteveO Gurgling and splashing.
39417 28 May 2025 @ 0503 --- SteveO Steaming heavily, post eruptive.
39397 27 May 2025 @ 1136 27 May 2025 @ 1229 SteveO Uncertain is gurgling. At 1229 Uncertain has stopped gurgling but steaming more. Appears to be lightly Bubbling pooling.
39370 26 May 2025 @ 0948 --- SteveO Gurgling and splashing. Twilight Spring has not draing yet.
39316 24 May 2025 @ 1522 --- SteveO gurgling and splashing
39261 22 May 2025 @ 1607 --- SteveO Gurgling and splashing.
39249 22 May 2025 @ 0918 --- SteveO Splashing.
39059 15 May 2025 @ 0830 --- rayceanderson Post eruptive
39052 14 May 2025 @ 1827 --- K.Cooper spitting
39010 12 May 2025 @ 1745 --- K.Cooper Gurglingm Small spitting. still very early in deep drain.
38989 11 May 2025 @ 1812 --- Graham Loud gurgling. Did not stay to see if it would erupt.
38983 11 May 2025 @ 1343 --- K.Cooper splashing
38908 09 May 2025 @ 1445 --- Dan A Splashing, group not in deep drain yet
38886 08 May 2025 @ 1413 --- rayceanderson Tiny splashing
38882 08 May 2025 @ 1357 --- K.Cooper gurgling. first splash 1412
38869 07 May 2025 @ 1529 --- K.Cooper splashing
38853 06 May 2025 @ 1504 --- K.Cooper splashing
38823 04 May 2025 @ 0719 --- K.Cooper first splash
38821 04 May 2025 @ 0706 --- K.Cooper gurgling
38770 03 May 2025 @ 2010 --- Graham Gurgling
38759 03 May 2025 @ 0857 --- Dan A Nice splashing
38757 03 May 2025 @ 0849 --- Dan A Frequent decent splashes
38751 02 May 2025 @ 1434 --- Dan A Water pooling and bubbling in vent
38750 02 May 2025 @ 1358 --- Dan A Gurgling
38729 01 May 2025 @ 1354 --- rayceanderson Splashing
38717 30 Apr 2025 @ 1711 --- Graham Gurgling with small splashes.
38689 29 Apr 2025 @ 1314 --- Graham Splashing has just stopped. This is the first observed deep drain that has not resulted in an Uncertain eruption this season.
38688 29 Apr 2025 @ 1159 --- Dan A Splashing
38681 28 Apr 2025 @ 0836 --- Graham Gurgling
38654 27 Apr 2025 @ 1108 --- Graham Gurgling
38632 26 Apr 2025 @ 1034 --- Graham Gurgling quietly. 1120 gurgling a bit better but no splashes. Then had several rises with splashing and erupted 9m later.
38598 23 Apr 2025 @ 1724 --- Graham Gurgling. 1807 small splashes.
38574 22 Apr 2025 @ 1255 --- Graham Gurgling. 1304 small splashes. 1345 improved to good splashing.
38485 18 Apr 2025 @ 1732 --- Graham Gurgling
38341 01 Mar 2025 @ 0908 --- K.Cooper splashing
38327 27 Feb 2025 @ 1159 --- K.Cooper splashing
38309 24 Feb 2025 @ 1604 --- K.Cooper splashing
38186 10 Jan 2025 @ 1240 --- Graham Splashing died down. Still gurgling.
38182 10 Jan 2025 @ 0820 --- Graham Gurgling
38175 09 Jan 2025 @ 0806 --- Graham Gurgling
38163 06 Jan 2025 @ 1322 --- Graham Gurgling. 1350 small splashes.
38150 04 Jan 2025 @ 1545 --- Graham Noisy gurgling just after Sawmill quit. Not in a deep drain. 1550 splashing. 1630 not seeing splashes now but it's still gurgling. Giving up on it.
38149 04 Jan 2025 @ 1359 --- Graham Splashing. Did not erupt.
38121 31 Dec 2024 @ 1029 --- K.Cooper light gurgling
38104 26 Dec 2024 @ 1002 --- K.Cooper weak splashing
38058 21 Dec 2024 @ 1055 --- K.Cooper Post eruptive 😕
37967 04 Dec 2024 @ 1506 --- minissa Dual with Sawmill. I now see how far to the left Uncertain is from this angle.
37960 29 Nov 2024 @ 1226 --- minissa It's erupting from the right place but is being a little "spasmodic" alternating small bursts with taller. I'd like a confirm. It sure isn't Sawmill. Edit: OK, Sawmill. It still looks like it's erupting from a vent way to the left (from wc perspective) within the crater and is small to middling. Well,this is why I wanted a confirm!
37609 17 Oct 2024 @ 0840 --- SantaFe108 Good splashing.
37594 16 Oct 2024 @ 1204 --- K.Cooper post eruptive
37582 15 Oct 2024 @ 1313 --- K.Cooper splashing
37546 13 Oct 2024 @ 1155 13 Oct 2024 @ 1211 Ben VL Gurgling. 1208 spit seen. Died down after. No uncertain this deep drain.
37429 07 Oct 2024 @ 0940 --- aferrara noisily gurgling and splashing up
37407 05 Oct 2024 @ 0849 --- Graham Activity stopped just after Sawmill started. Maybe it will resume? Twilight is still not full.
37406 05 Oct 2024 @ 0836 --- Graham Gurgling and splashing
37395 04 Oct 2024 @ 1439 04 Oct 2024 @ 1508 Ben VL Splashing from what seems to be a low water level. Group in deep drain. 1443 huge splash. 1446 huge splash. 1451 nice series of splashes. 1452 excellent splash. 1454 splash series. 1508 nice series of splashes after a bit of a break. Quit splashing after Sawmill started.
37338 03 Oct 2024 @ 0700 --- Graham Gurgling. 0721 splashing nicely.
37336 02 Oct 2024 @ 1901 --- Graham Gurgling
37327 02 Oct 2024 @ 0835 --- Graham Drifting post eruptive light steam
37305 01 Oct 2024 @ 0950 --- Dan A Pooling water has vanished and uncertain is back to gurgling
37304 01 Oct 2024 @ 0937 --- Dan A Water pooling
37302 01 Oct 2024 @ 0913 --- Ben VL Gurgling
37287 30 Sep 2024 @ 1848 --- Dan A Water pooling
37264 29 Sep 2024 @ 1900 --- Ben VL Splashing. Group is in the wrong part of the cycle... Sawmill & Tardy high, Twilight in overflow, Spasmodic high, Penta pools high. Weird. 1913 very large splash 1920 Spasmodic has quit, water levels dropping in sawmill, tardy & penta. Uncertain gurgling has subsided.
37186 27 Sep 2024 @ 0843 --- Dan A Lightly gurgling
Baseline does not exist.