| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 39004 |
12 May 2025 @ 1007 |
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steve |
Little Brother is erupting, usually with intervals under one minute and durations of 2-5 seconds. Height 3 to 12 feet. |
| 38690 |
29 Apr 2025 @ 1355 |
29 Apr 2025 @ 1357 |
Graham |
2 eruptions per minute up to now, then a gap. Three Crater also quiet. |
| 38629 |
26 Apr 2025 @ 0717 |
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CraigC |
Little Brother is erupting more than once a minute, but GT won't accept multiple entries for the same minute. |
| 37635 |
19 Oct 2024 @ 1037 |
19 Oct 2024 @ 1042 |
DanS |
Erupting about every 1.5 mins, then paused 1037-1042 with no eruption. |
| 37150 |
25 Sep 2024 @ 1208 |
25 Sep 2024 @ 1316 |
Graham |
Frequent eruptions, but shortly after each of the (3) Three Crater eruptions, there was a longer interval, as if Little Brother skipped an eruption. Longer intervals didn't occur at other times. |
| 36927 |
12 Sep 2024 @ 1209 |
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Micah Kipple |
1209:12 - little blip to 4 inches without erupting. |
| 36926 |
12 Sep 2024 @ 1206 |
--- |
Micah Kipple |
1206:03 - Roiled up to about 8 inches but didn't erupt. |
| 36436 |
17 Aug 2024 @ 1705 |
17 Aug 2024 @ 1736 |
minissa |
Have been watching as noted with eruptions every 2-3 minutes but LB has been draining bit by bit till pool between eruptions is barely visible from road. Eruptions are forceful and 10-15 feet high, though brief. |
| 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 |
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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 |
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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 |
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TSBryan |
erupting every 1 to 3.5 minutes, durations usually less than 5 seconds |
| 23620 |
07 Sep 2022 @ 1317 |
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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 |
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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 |
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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 |
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Art-P |
erupting every 1 1/2 to 2 minutes |
| 20747 |
22 Jan 2022 @ 1315 |
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K.Cooper |
Continuing eruptions every minute, same size. |
| 20746 |
22 Jan 2022 @ 0958 |
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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 |
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aferrara |
Tiny splash |
| 11007 |
20 Apr 2019 @ 1427 |
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Micah Kipple |
Dormant. Crater filled with orange bacteria. |