Last Known Eruption
13h 48m ago

Latest Eruptions

Eruption DurationInterval
18 Aug 2025 @ 12143h 10m
18 Aug 2025 @ 0904 ns wc17h 18m
17 Aug 2025 @ 1546 ie wc2d 2h 48m
15 Aug 2025 @ 12582m 31m
15 Aug 2025 @ 12272m 31m
15 Aug 2025 @ 115629m
15 Aug 2025 @ 11273m 29m
15 Aug 2025 @ 105828m
15 Aug 2025 @ 1030 A31m
15 Aug 2025 @ 09593m 32m
15 Aug 2025 @ 09273m 34m
15 Aug 2025 @ 08533m 26m
15 Aug 2025 @ 0827 ie36m
15 Aug 2025 @ 075120m
15 Aug 2025 @ 07311d 12h 43m
13 Aug 2025 @ 1848 ie4h 0m
13 Aug 2025 @ 1448 ie33m
13 Aug 2025 @ 1415 ie31m
13 Aug 2025 @ 1344 ie32m
13 Aug 2025 @ 1312 ie31m
13 Aug 2025 @ 1241 ie30m
13 Aug 2025 @ 1211 ie2h 59m
13 Aug 2025 @ 0912 ie19h 41m
12 Aug 2025 @ 13312m 31m
12 Aug 2025 @ 13002m 31m
12 Aug 2025 @ 12292m 31m
12 Aug 2025 @ 11582m 31m
12 Aug 2025 @ 11272m 34m
12 Aug 2025 @ 105331m
12 Aug 2025 @ 10221h 3m
12 Aug 2025 @ 091955m
12 Aug 2025 @ 0824 ie>2m 7h 30m
12 Aug 2025 @ 005410h 33m
11 Aug 2025 @ 1421 ns26m
11 Aug 2025 @ 13552h 19m
11 Aug 2025 @ 1136 ns15h 26m
10 Aug 2025 @ 2010 ns2h 57m
10 Aug 2025 @ 1713 ie29m
10 Aug 2025 @ 1644 ie25m
10 Aug 2025 @ 161931m
10 Aug 2025 @ 1548 ie1h 0m
10 Aug 2025 @ 14481h 49m
10 Aug 2025 @ 1259 ie29m
10 Aug 2025 @ 1230 ie46m
10 Aug 2025 @ 1144 ie15h 13m
09 Aug 2025 @ 20312h 34m
09 Aug 2025 @ 17574h 37m
09 Aug 2025 @ 1320 ie29m
09 Aug 2025 @ 1251 ie20h 56m
08 Aug 2025 @ 15551d 21h 41m
06 Aug 2025 @ 1814 ie wc4h 34m
06 Aug 2025 @ 1340 ie wc1d 2h 51m
05 Aug 2025 @ 1049 wc18h 53m
04 Aug 2025 @ 1556 ie wc1d 4h 3m
03 Aug 2025 @ 1153 ie wc18h 24m
02 Aug 2025 @ 1729 ie57m
02 Aug 2025 @ 1632 ie59m
02 Aug 2025 @ 1533 wc2h 34m
02 Aug 2025 @ 1259 ie21h 31m
01 Aug 2025 @ 15281h 49m
01 Aug 2025 @ 13392h 8m
01 Aug 2025 @ 1131 ns wc1d 22h 42m
30 Jul 2025 @ 1249 ie wc21h 58m
29 Jul 2025 @ 1451 ie wc3h 57m
29 Jul 2025 @ 1054 ie wc15h 55m
28 Jul 2025 @ 1859 ie wc3h 34m
28 Jul 2025 @ 15251h 13m
28 Jul 2025 @ 14121h 19m
28 Jul 2025 @ 1253 ie52m
28 Jul 2025 @ 1201 wc16h 50m
27 Jul 2025 @ 1911 ie wc5h 44m
27 Jul 2025 @ 1327 ie wc29m
27 Jul 2025 @ 1258 ie wc3h 25m
27 Jul 2025 @ 0933 ie wc1d 20h 11m
25 Jul 2025 @ 1322 wc29m
25 Jul 2025 @ 1253 wc1h 54m
25 Jul 2025 @ 1059 ie wc1d 19h 14m
23 Jul 2025 @ 1545 wc3m 22s 7h 47m
23 Jul 2025 @ 0758 ie wc1d 47m
22 Jul 2025 @ 0711 ie wc14h 55m
21 Jul 2025 @ 1616 ie wc8h 32m
21 Jul 2025 @ 0744 ns wc26m
21 Jul 2025 @ 0718 ie wc2d 19h 27m
18 Jul 2025 @ 1151 ie wc1h 22m
18 Jul 2025 @ 102929m
18 Jul 2025 @ 10001h 2m
18 Jul 2025 @ 08581h 50m
18 Jul 2025 @ 0708 ie wc17h 42m
17 Jul 2025 @ 132631m
17 Jul 2025 @ 125531m
17 Jul 2025 @ 122432m
17 Jul 2025 @ 115219h 51m
16 Jul 2025 @ 160158m
16 Jul 2025 @ 1503 wc29m
16 Jul 2025 @ 1434 ns wc1h 25m
16 Jul 2025 @ 1309 ie wc1h 0m
16 Jul 2025 @ 1209 ie wc5h 32m
16 Jul 2025 @ 0637 ie wc17h 3m
15 Jul 2025 @ 1334 ie wc23h 2m
14 Jul 2025 @ 1432 ie wc55m

Interval Statistics

Interval Count100
Min20m
Max2d 19h 27m
Mean8h 23m
Median1h 23m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
33844 17 Jan 2024 @ 1511 --- K.Cooper constant low splashing no eruption
33808 16 Jan 2024 @ 0805 --- K.Cooper light splashing no recent eruption
31932 03 Dec 2023 @ 0731 --- Delta4Heavy85 "Stuck" again doing small splashes
29178 28 Oct 2023 @ 1258 --- JarnoO (wc, all day so far) Appears to be stuck or otherwise inactive.
26492 20 Jun 2023 @ 1027 --- Graham Stuck doing small splashes. no real eruption in over 30m
25543 19 May 2023 @ 0725 --- Graham Big splashes but failed to erupt.
25390 12 May 2023 @ 1428 --- Janet Jones The overflow channel is devoid of microbes. It had microbes in March, but that could have been due to the weather/time of year. In looking back at other photos, it does seem to be hot enough at times to not have microbes and cool enough other times to allow for their growth. This does not appear to be necessarily seasonal.
21653 02 Jun 2022 @ 0840 --- Graham Splashed a lot but failed to erupt.
21421 22 May 2022 @ 0850 22 May 2022 @ 0903 Micah Kipple Has been "stuck" during this time. Can't quite seem to start.
20876 07 Mar 2022 @ 1148 --- JarnoO (wc) Spitting every so often during this and the next minute.
13513 03 Sep 2019 @ 0906 03 Sep 2019 @ 0927 Micah Kipple Appears to be stuck
10601 13 Oct 2018 @ 0713 --- JarnoO Seemed to be splashing at this time. Not sure if I caught the tail end of an eruption or if it was 'stuck'.
10411 24 Sep 2018 @ 1251 --- BobInSLC seems to be having mostly "minor" eruptions of less than 2 feet. need to observe little cub before a lion initial
9902 28 Aug 2018 @ 0955 --- BobInSLC in stuck mode
8549 01 Jun 2018 @ 2030 01 Jun 2018 @ 2200 Siegmund No eruptions during this time. Observed one episode of preplay ~15cm high at 2117 less than 1 minute long.
4461 14 Jul 2017 @ 1958 --- mhreed Stuck. And it's not very windy...?
4408 05 Jul 2017 @ 1800 --- BobInSLC tried to erupt fully for 10 plus minutes
3637 10 Sep 2016 @ 1156 --- BobInSLC tried to erupt
3623 08 Sep 2016 @ 1238 --- BobInSLC stuck ......
3534 23 Aug 2016 @ 2052 --- WillBoekel Appears to be stuck.
3511 19 Aug 2016 @ 1003 --- mhreed It's stuck. :(
3223 06 Jul 2016 @ 0744 --- ghost63 several small spouts noted on wc while Lion was erupting.
2519 11 Oct 2015 @ 1107 --- mhreed Stuck - and yes, it is quite windy.
2309 09 Sep 2015 @ 1937 --- BobInSLC stuck. .
2300 08 Sep 2015 @ 1646 --- BobInSLC stuck. .
2284 07 Sep 2015 @ 1031 --- BobInSLC stuck ......
2282 07 Sep 2015 @ 0904 --- BobInSLC stuck
2274 06 Sep 2015 @ 0839 06 Sep 2015 @ 1122 BobInSLC stuck, little cub has not fully erupted since before 8:30
1771 21 Jun 2015 @ 0601 --- RMichaels Little cub is stuck.
1735 14 Jun 2015 @ 0729 --- mhreed Appears stuck.
1729 12 Jun 2015 @ 1904 12 Jun 2015 @ 2129 WillBoekel no eruptions
1664 30 May 2015 @ 0844 --- BobInSLC stuck to at least 9:07 with pauses
1655 28 May 2015 @ 1111 --- WillBoekel stuck
1647 26 May 2015 @ 0925 --- mhreed Little Cub is stuck.
1511 18 Jan 2015 @ 1700 --- mhreed Stuck in preplay. I speculate that this geyser doesn't like wind.
1508 17 Jan 2015 @ 0820 --- mhreed Stuck in preplay.
1472 26 Oct 2014 @ 1358 --- mhreed Showing "stuck" behavior - constantly splashing just out of the cone at 1358.
1184 02 Sep 2014 @ 1059 --- Pat Snyder Stopped squirting at 1059.
1183 02 Sep 2014 @ 0950 02 Sep 2014 @ 1027 Pat Snyder Has been squirting but not erupting from 0950 to 1027. Low squirts barely above the cone and continuous.
1044 18 Apr 2014 @ 0800 18 Apr 2014 @ 2000 udo In over 6 hours I have not seen any eruptions, only occasional individual splashes.
810 17 May 2013 @ 2049 17 May 2013 @ 2105 Siegmund preplay starting 2049 but no eruption as of 2105
97 07 Feb 2012 @ 1226 --- BB This is one of those days where it is hard to tell from the UGB cam what Little Cub is doing. I am pretty sure from my captures that Little Cub was 1226 ns. But KL posted 1216, and I assume he was watching the streaming cam, hard to be wrong about LC there.
1355 07 Sep 2007 @ 0920 07 Sep 2007 @ 0929 BoekelUpload 9:2x
16680 01 Jul 1998 @ 0000 01 Jul 1998 @ 2359 JarnoO unreadable ×2
16607 19 Mar 1998 @ 1430 19 Mar 1998 @ 1439 JarnoO 14:3x
16530 11 Jan 1998 @ 1004 11 Jan 1998 @ 1037 JarnoO many minors 1004 to 1037
15258 01 Jul 1996 @ 2030 01 Jul 1996 @ 2039 JarnoO 20:3x
15250 28 Jun 1996 @ 1300 28 Jun 1996 @ 1359 JarnoO 13:xx ie
15221 24 May 1996 @ 1210 24 May 1996 @ 1219 JarnoO 12:1x d=12
15220 22 May 1996 @ 1520 22 May 1996 @ 1529 JarnoO 15:2x
14284 20 Feb 1995 @ 1700 20 Feb 1995 @ 1759 JarnoO 17:xx xx
12736 08 Sep 1994 @ 1000 08 Sep 1994 @ 1059 JarnoO 10:xx ie
12710 06 Aug 1994 @ 1920 06 Aug 1994 @ 1929 JarnoO 19:2x
12709 06 Aug 1994 @ 0940 06 Aug 1994 @ 0949 JarnoO 09:4x
12698 24 Jul 1994 @ 1300 24 Jul 1994 @ 1359 JarnoO 13:xx
12683 30 Jun 1994 @ 0910 30 Jun 1994 @ 0919 JarnoO 09:1x ie
12656 05 Jun 1994 @ 1500 05 Jun 1994 @ 1559 JarnoO 15:xx ie
12655 05 Jun 1994 @ 1400 05 Jun 1994 @ 1459 JarnoO 14:xx ie
12613 28 Feb 1994 @ 1004 28 Feb 1994 @ 1054 JarnoO 10:x4
12358 24 Dec 1993 @ 1620 24 Dec 1993 @ 1629 JarnoO 16:2x ie
12247 30 Jun 1993 @ 1330 30 Jun 1993 @ 1339 JarnoO 13:3x
12217 06 Jun 1993 @ 1510 06 Jun 1993 @ 1519 JarnoO 15:1x
7032 08 Oct 1992 @ 1830 08 Oct 1992 @ 1839 JarnoO 18:3x
7031 08 Oct 1992 @ 1720 08 Oct 1992 @ 1729 JarnoO 17:2x
5705 31 Aug 1992 @ 1210 31 Aug 1992 @ 1219 JarnoO 12:1x
5428 09 Jul 1992 @ 2100 09 Jul 1992 @ 2109 JarnoO 21:0x
5427 09 Jul 1992 @ 1800 09 Jul 1992 @ 1809 JarnoO 18:0x
5412 04 Jul 1992 @ 1900 04 Jul 1992 @ 1959 JarnoO 19:xx
5213 14 May 1992 @ 1128 14 May 1992 @ 1138 JarnoO either 1128 or 1138
173 08 Jan 1971 @ 0000 08 Jan 1971 @ 2359 BoekelUpload active
171 07 Jan 1971 @ 0000 07 Jan 1971 @ 2359 BoekelUpload active
172 07 Jan 1971 @ 0000 07 Jan 1971 @ 2359 BoekelUpload Disreguard last note it was an error
EntrySourceLinkComment
01 Mar 2023 @ 1003 Delta4Heavy85 https://adobe.ly/3Y6AUQZ Video of eruption
22 Jun 2016 @ 0928 ghost63 https://www.flickr.com/photos/ujelang/27757510220/in/dateposted-public/ photo taken at 09:28/22 June
01 Apr 2016 @ 1843 ZubenElGenubi https://youtu.be/i9qDSAdlu1o YouTube
09 Aug 2015 @ 1557 JSJ https://www.youtube.com/watch?v=nZUwdrOJ0oU See clips # 21-22 (= last two clips) of this video compilation (Little Cub erupting in concert with Castle).
09 Aug 2015 @ 1336 JSJ https://www.youtube.com/watch?v=nZUwdrOJ0oU See clips # 18-20 of this video compilation.
09 Aug 2015 @ 1227 JSJ https://www.youtube.com/watch?v=nZUwdrOJ0oU See clips # 14-17 of this video compilation.
09 Aug 2015 @ 1152 JSJ https://www.youtube.com/watch?v=nZUwdrOJ0oU See clips # 10-13 of this video compilation.
09 Aug 2015 @ 1118 JSJ https://www.youtube.com/watch?v=nZUwdrOJ0oU See clip # 9 of this video compilation.
09 Aug 2015 @ 1042 JSJ https://www.youtube.com/watch?v=nZUwdrOJ0oU See clips # 6-8 of this video compilation.
17 May 2015 @ 1601 JSJ https://www.youtube.com/watch?v=nZUwdrOJ0oU See clips # 1-5 of this video compilation.
Baseline does not exist.