Last Known Eruption
180d 13h 11m ago

Latest Eruptions

Eruption DurationInterval
23 Oct 2023 @ 1013 ie wc65d 19h 3m
18 Aug 2023 @ 15103m
18 Aug 2023 @ 15072d 19h 26m
15 Aug 2023 @ 194116d 8h 48m
30 Jul 2023 @ 1053 wc5d 22h 27m
24 Jul 2023 @ 1226 wc19h 56m
23 Jul 2023 @ 1630 wc3h 3m
23 Jul 2023 @ 1327 wc3m
23 Jul 2023 @ 1324 wc3h 43m
23 Jul 2023 @ 0941 wc16h 45m
22 Jul 2023 @ 16563m
22 Jul 2023 @ 16531h 59m
22 Jul 2023 @ 1454 wc20h 51m
21 Jul 2023 @ 1803 wc13m
21 Jul 2023 @ 1750 wc17m
21 Jul 2023 @ 17332m
21 Jul 2023 @ 17314m
21 Jul 2023 @ 17273m
21 Jul 2023 @ 17241m
21 Jul 2023 @ 17231m
21 Jul 2023 @ 17224m
21 Jul 2023 @ 17181m
21 Jul 2023 @ 17171m
21 Jul 2023 @ 17161m
21 Jul 2023 @ 17157m
21 Jul 2023 @ 17082m
21 Jul 2023 @ 17065h 16m
21 Jul 2023 @ 1150 wc2h 29m
21 Jul 2023 @ 0921 wc1d 1h 6m
20 Jul 2023 @ 0815 wc3m
20 Jul 2023 @ 0812 wc14h 22m
19 Jul 2023 @ 1750 wc1m
19 Jul 2023 @ 1749 wc1m
19 Jul 2023 @ 1748 wc54m
19 Jul 2023 @ 1654 wc1d 8h 15m
18 Jul 2023 @ 0839 wc2m
18 Jul 2023 @ 0837 wc1m
18 Jul 2023 @ 0836 wc9d 21h 29m
08 Jul 2023 @ 11071h 20m
08 Jul 2023 @ 0947 ie18h 44m
07 Jul 2023 @ 15032m
07 Jul 2023 @ 15013m
07 Jul 2023 @ 14581d 20m
06 Jul 2023 @ 14381m
06 Jul 2023 @ 14371m
06 Jul 2023 @ 143612d 1h 38m
24 Jun 2023 @ 12581d 21h 46m
22 Jun 2023 @ 15121m
22 Jun 2023 @ 15111m
22 Jun 2023 @ 15102m
22 Jun 2023 @ 15087h 7m
22 Jun 2023 @ 08012d 19h 51m
19 Jun 2023 @ 12102d 18h 18m
16 Jun 2023 @ 17521d 6m
15 Jun 2023 @ 17461d 1h 28m
14 Jun 2023 @ 16181d 31m
13 Jun 2023 @ 15476d 8h 46m
07 Jun 2023 @ 07013d 23h 9m
03 Jun 2023 @ 07521m
03 Jun 2023 @ 07511m
03 Jun 2023 @ 07501m
03 Jun 2023 @ 07493m
03 Jun 2023 @ 07462d 15h 13m
31 May 2023 @ 1633 wc21h 47m
30 May 2023 @ 18463m
30 May 2023 @ 18432m
30 May 2023 @ 18412d 8h 56m
28 May 2023 @ 09453m
28 May 2023 @ 09423m
28 May 2023 @ 09393m
28 May 2023 @ 09361m
28 May 2023 @ 09351m
28 May 2023 @ 09346m
28 May 2023 @ 09283m
28 May 2023 @ 09252m
28 May 2023 @ 09232m
28 May 2023 @ 09214d 23h 17m
23 May 2023 @ 1004 wc2h 0m
23 May 2023 @ 0804 wc23h 57m
22 May 2023 @ 0807 wc16h 6m
21 May 2023 @ 1601 wc3m
21 May 2023 @ 1558 wc2d 1h 5m
19 May 2023 @ 145320h 56m
18 May 2023 @ 1757 ie1h 36m
18 May 2023 @ 1621 wc1d 7h 49m
17 May 2023 @ 0832 wc
17 May 2023 @ 0832 wc2m
17 May 2023 @ 0830 wc1m
17 May 2023 @ 0829 wc2d 12h 20m
14 May 2023 @ 2009 wc10h 33m
14 May 2023 @ 0936 wc3m
14 May 2023 @ 09331d 17h 22m
12 May 2023 @ 16112m
12 May 2023 @ 16095d 1h 21m
07 May 2023 @ 1448 wc1d 16m
06 May 2023 @ 14321m
06 May 2023 @ 14311m
06 May 2023 @ 14301m
06 May 2023 @ 14292m
06 May 2023 @ 14271m

Interval Statistics

Interval Count99
Min1m
Max65d 19h 3m
Mean1d 17h 10m
Median6m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.
No attachments for this geyser.
Baseline does not exist.