| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 41056 |
13 Aug 2025 @ 1226 |
13 Aug 2025 @ 1513 |
JSJ |
All closed intervals: 30m, 33m, 31m, 44m, 28m. |
| 40968 |
10 Aug 2025 @ 1105 |
10 Aug 2025 @ 1650 |
JSJ |
Closed intervals: 42m, 18m, 41m, 39m, 39m, 45m, 42m, 43m, 36m. Same general behavior as reported on 2 August 2025 (see that note). |
| 40759 |
02 Aug 2025 @ 1117 |
02 Aug 2025 @ 1701 |
JSJ |
Closed intervals: 31m, 43m, 30m, 35m, 34m, 31m, 26m, 34m, 37m, 43m. Eruptions preceded by many minutes of very intermittent, brief, very low splashing or spitting, sometimes several seconds of very low splashing. Filmed several of these eruptions. |
| 33809 |
16 Jan 2024 @ 0805 |
--- |
K.Cooper |
audible steam |
| 27992 |
04 Sep 2023 @ 0826 |
--- |
Graham |
Eruptions observed in the last few days appear to be taller than in the spring, peaking at 3 feet. |
| 25599 |
20 May 2023 @ 1751 |
--- |
SantaFe108 |
Intermittently splashing 6 inches tall. |
| 25232 |
23 Apr 2023 @ 1544 |
--- |
SantaFe108 |
Low splashing <6 inches tall sustained for about 10 seconds, followed by a pause of 20 or so seconds, then another ~10 seconds of low splashing. |
| 21799 |
06 Jun 2022 @ 1747 |
--- |
SantaFe108 |
Frequent small splashing without erupting. |
| 19955 |
10 Oct 2021 @ 1754 |
--- |
SantaFe108 |
(wc) Sustained, moderate-to-low height play for 15 seconds. Possibly a minor eruption or very large pre-play. Camera panned away for Old Faithful so I couldn't see if there was a full-sized eruption after. |
| 19512 |
12 Sep 2021 @ 1507 |
--- |
SantaFe108 |
(wc) Small non-eruptive splashing at 1507/08, and also at 1509. Both episodes lasted only seconds. |
| 19217 |
31 Aug 2021 @ 1845 |
31 Aug 2021 @ 1901 |
SantaFe108 |
(wc) UNNG-GHG-18 "Marmot's Tail" N-NE of Marmot Cave and W-SW of Plate. A small eruption started at 1845, followed by an increase to almost full height (~1'), which fizzled out within seconds. More small eruptions occured every few minutes, all of them incredibly small and durations of only seconds. This lasted until the next full-sized eruption at 1901. I am unsure if it continued after. |