Last Known Eruption
20h 42m ago

Latest Eruptions

Eruption DurationInterval
20 Jul 2024 @ 1637 wc9h 46m
20 Jul 2024 @ 0651 wc19h 47m
19 Jul 2024 @ 1104 wc2h 31m
19 Jul 2024 @ 0833 wc12h 32m
18 Jul 2024 @ 2001 wc2m
18 Jul 2024 @ 1959 wc1m
18 Jul 2024 @ 1958 wc29m
18 Jul 2024 @ 1929 wc1m
18 Jul 2024 @ 1928 wc2m
18 Jul 2024 @ 1926 wc2m
18 Jul 2024 @ 1924 wc2m
18 Jul 2024 @ 1922 wc11h 50m
18 Jul 2024 @ 0732 wc17m
18 Jul 2024 @ 0715 wc1m
18 Jul 2024 @ 0714 wc1m
18 Jul 2024 @ 0713 wc3m
18 Jul 2024 @ 0710 wc2m
18 Jul 2024 @ 0708 wc1d 13h 37m
16 Jul 2024 @ 1731 wc4s 1m
16 Jul 2024 @ 1730 wc5s 7h 34m
16 Jul 2024 @ 0956 wc19h 2m
15 Jul 2024 @ 1454 wc6s 2m
15 Jul 2024 @ 1452 wc4s 1m
15 Jul 2024 @ 1451 wc6s 4d 6h 14m
11 Jul 2024 @ 08372d 15h 57m
08 Jul 2024 @ 164023h 37m
07 Jul 2024 @ 17032m
07 Jul 2024 @ 17012d 55m
05 Jul 2024 @ 1606 wc5s 1m
05 Jul 2024 @ 1605 wc4s
05 Jul 2024 @ 1605 wc4s 1d 7h 43m
04 Jul 2024 @ 0822 wc1h 39m
04 Jul 2024 @ 0643 wc1m
04 Jul 2024 @ 0642 wc1m
04 Jul 2024 @ 0641 wc18h 29m
03 Jul 2024 @ 12122m
03 Jul 2024 @ 12101m
03 Jul 2024 @ 12092m
03 Jul 2024 @ 12075h 30m
03 Jul 2024 @ 0637 wc3m
03 Jul 2024 @ 0634 wc21h 53m
02 Jul 2024 @ 0841 wc2m
02 Jul 2024 @ 0839 wc1d 0m
01 Jul 2024 @ 0839 wc21h 16m
30 Jun 2024 @ 112354m
30 Jun 2024 @ 1029 wc2m
30 Jun 2024 @ 1027 wc14m
30 Jun 2024 @ 1013 wc3h 52m
30 Jun 2024 @ 0621 wc10h 5m
29 Jun 2024 @ 2016 ie18m
29 Jun 2024 @ 1958 wc6h 10m
29 Jun 2024 @ 1348 wc2h 5m
29 Jun 2024 @ 114322h 30m
28 Jun 2024 @ 1313 wc1m
28 Jun 2024 @ 1312 wc34m
28 Jun 2024 @ 12383m
28 Jun 2024 @ 12358m
28 Jun 2024 @ 1227 wc2m
28 Jun 2024 @ 1225 wc4h 5m
28 Jun 2024 @ 0820 wc49m
28 Jun 2024 @ 0731 wc4m
28 Jun 2024 @ 0727 wc1d 21h 51m
26 Jun 2024 @ 0936 wc1m
26 Jun 2024 @ 0935 wc23m
26 Jun 2024 @ 0912 wc2m
26 Jun 2024 @ 0910 wc2m
26 Jun 2024 @ 0908 wc5m
26 Jun 2024 @ 09031d 17h 16m
24 Jun 2024 @ 15474m
24 Jun 2024 @ 15431m
24 Jun 2024 @ 15421m
24 Jun 2024 @ 15411m
24 Jun 2024 @ 15401m
24 Jun 2024 @ 15395m
24 Jun 2024 @ 15341m
24 Jun 2024 @ 15335h 41m
24 Jun 2024 @ 09522m
24 Jun 2024 @ 09502m
24 Jun 2024 @ 09481d 22h 59m
22 Jun 2024 @ 10493m
22 Jun 2024 @ 104622h 34m
21 Jun 2024 @ 1212 ns wc4h 5m
21 Jun 2024 @ 0807 wc1m
21 Jun 2024 @ 0806 wc48m
21 Jun 2024 @ 0718 wc1m
21 Jun 2024 @ 0717 wc14h 52m
20 Jun 2024 @ 1625 wc2m
20 Jun 2024 @ 1623 ie wc1d 8h 9m
19 Jun 2024 @ 0814 wc2m
19 Jun 2024 @ 0812 wc1m
19 Jun 2024 @ 0811 wc15h 54m
18 Jun 2024 @ 1617 wc4s 2m
18 Jun 2024 @ 1615 wc6s 1d 6h 28m
17 Jun 2024 @ 0947 wc4s 2d 3h 46m
15 Jun 2024 @ 0601 wc2m
15 Jun 2024 @ 0559 wc13h 4m
14 Jun 2024 @ 16553m
14 Jun 2024 @ 16522m
14 Jun 2024 @ 16502m
14 Jun 2024 @ 16482h 20m

Interval Statistics

Interval Count99
Min1m
Max4d 6h 14m
Mean8h 44m
Median5m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
35525 24 Jun 2024 @ 1533 24 Jun 2024 @ 1547 steve I believe all the intervals recorded over this time span were closed intervals.
35157 12 Jun 2024 @ 1733 --- JSJ Brief, low surging / doming over vent area.
35156 12 Jun 2024 @ 1652 --- JSJ Brief pool bouncing and roiling over vent area.
35135 12 Jun 2024 @ 0623 --- CraigC There were 2 eruptions within 0623, could only enter the first one for the that time
34979 07 Jun 2024 @ 1508 07 Jun 2024 @ 1614 JSJ Closed intervals (some 1 minute intervals are hidden by GT in this listing). Only one Three Crater eruption during this time.
34896 04 Jun 2024 @ 1554 04 Jun 2024 @ 1728 JSJ All closed intervals (there's a hidden 1m interval in the GT postings). Erratic intervals, ranging from 1 minute to 18 minutes. All durations 2 to 3 seconds.
34902 04 Jun 2024 @ 1657 --- JSJ Two very low, brief surges / boils. Not enough to call it an eruption.
28363 20 Sep 2023 @ 1232 --- DanS Blipping for a few seconds
27425 05 Aug 2023 @ 1748 05 Aug 2023 @ 1911 JSJ No eruptions. Inactive.
26544 13 Jun 2023 @ 1520 --- Siegmund I watched 4 consecutive eruptions. Each was followed by 1 or 2 bursts from Three Crater a few seconds after Little Brother stopped. Some of these were quite large and vertical, as big as Little Brother itself. Little Brother remained active later today and the next 3 days but I never again saw Three Crater acting in concert with it.
25817 27 May 2023 @ 1545 --- TSBryan erupting every 1 to 3.5 minutes, durations usually less than 5 seconds
23620 07 Sep 2022 @ 1317 --- Graham Last entry on GT is Aug 15. Area around its crater is dry. Likely dormant now?
22410 08 Jul 2022 @ 1830 08 Jul 2022 @ 1904 minissa Noticed a tiny sput in the catch basin /berm {ie pool of standing water within the berm} of LB. Eruption is all of 2 inches and is difficult to see without binoculars but seems to be a tiny perpetual spouter. Didn't know if it had been noticed before.
21393 20 May 2022 @ 1942 --- BillJ Several brief eruptions around this time; intervals typically `1 minute but couldn't get exact times.
21382 20 May 2022 @ 0830 20 May 2022 @ 1013 Micah Kipple Little Brother is erupting 5-10 feet high every 30-70 seconds (with outliers on both sides) . Preliminary observations and timing this morning suggests that it likes to slow down after an eruption of 3 crater. Detailed eruption entries and further observations to follow.
21060 23 Apr 2022 @ 1705 23 Apr 2022 @ 1735 DanS Little Brother continues to erupt every minute or two.
21002 18 Apr 2022 @ 1739 --- steve Little Brother appears to be erupting about once a minute. GT tends to assume the second eruption is a secondary report of the eruption a minute earlier.
20989 16 Apr 2022 @ 1514 16 Apr 2022 @ 1519 steve Little Brother appears to be erupting once to twice a minute to 6-10 feet. So far all I have seen are single bursts.
20777 02 Feb 2022 @ 1022 --- Art-P erupting every 1 1/2 to 2 minutes
20747 22 Jan 2022 @ 1315 --- K.Cooper Continuing eruptions every minute, same size.
20746 22 Jan 2022 @ 0958 --- K.Cooper Continuing to erupt roughly every minute to two minutes. Roughly the same size as yesterday.
20743 21 Jan 2022 @ 1426 21 Jan 2022 @ 1442 aferrara Continued eruptions around once per minute. More frequent when Three Crater tries to start.
20741 21 Jan 2022 @ 1359 --- aferrara Tiny splash
11007 20 Apr 2019 @ 1427 --- Micah Kipple Dormant. Crater filled with orange bacteria.
EntrySourceLinkComment
12 Jun 2024 @ 1755 JSJ https://www.youtube.com/watch?v=7hrrZc8Q69c Video (clip 2 to the end) of Little Brother Geyser eruptions on 12 June 2024.
13 Jun 2023 @ 1547 JSJ https://www.youtube.com/watch?v=7461p2mMlG8 Video of Little Brother Geyser eruptions in the afternoon of 13 June 2023.
Baseline does not exist.