Last Known Eruption
2d 22h 56m ago

Latest Eruptions

Eruption DurationInterval
16 Jul 2024 @ 09548m
16 Jul 2024 @ 09462m
16 Jul 2024 @ 09445m
16 Jul 2024 @ 09394m
16 Jul 2024 @ 09356m
16 Jul 2024 @ 09296d 24m
10 Jul 2024 @ 0905 ie15d 21h 10m
24 Jun 2024 @ 11552m 18s 4m
24 Jun 2024 @ 115132s 9m
24 Jun 2024 @ 11423m 48s 5m
24 Jun 2024 @ 11371m 25s 4m
24 Jun 2024 @ 113327s 10m
24 Jun 2024 @ 11233m
24 Jun 2024 @ 11205m
24 Jun 2024 @ 1115 ie19d 20h 38m
04 Jun 2024 @ 14374m
04 Jun 2024 @ 143310m
04 Jun 2024 @ 14234m
04 Jun 2024 @ 14193m
04 Jun 2024 @ 141611m
04 Jun 2024 @ 14055m
04 Jun 2024 @ 14005m
04 Jun 2024 @ 13559m
04 Jun 2024 @ 13463m
04 Jun 2024 @ 134310m
04 Jun 2024 @ 13335m
04 Jun 2024 @ 13284m
04 Jun 2024 @ 132410m
04 Jun 2024 @ 13144m
04 Jun 2024 @ 13104m
04 Jun 2024 @ 130610m
04 Jun 2024 @ 12565m
04 Jun 2024 @ 12513m
04 Jun 2024 @ 124811m
04 Jun 2024 @ 12373m
04 Jun 2024 @ 12344m
04 Jun 2024 @ 12304m
04 Jun 2024 @ 12269m
04 Jun 2024 @ 12174m
04 Jun 2024 @ 12133m
04 Jun 2024 @ 1210 ns10m
04 Jun 2024 @ 12005m
04 Jun 2024 @ 11554m
04 Jun 2024 @ 11519m
04 Jun 2024 @ 11424m
04 Jun 2024 @ 11384m
04 Jun 2024 @ 11349m
04 Jun 2024 @ 11254m
04 Jun 2024 @ 11215m
04 Jun 2024 @ 11164m
04 Jun 2024 @ 11129m
04 Jun 2024 @ 11033m
04 Jun 2024 @ 110010m
04 Jun 2024 @ 10505m
04 Jun 2024 @ 10455m
04 Jun 2024 @ 10403m
04 Jun 2024 @ 103725d 16h 0m
09 May 2024 @ 18376m
09 May 2024 @ 18314m
09 May 2024 @ 18276m
09 May 2024 @ 182114d 4h 43m
25 Apr 2024 @ 13384m
25 Apr 2024 @ 13347m
25 Apr 2024 @ 1327211d 2h 48m
27 Sep 2023 @ 10393m
27 Sep 2023 @ 103612m
27 Sep 2023 @ 10243m
27 Sep 2023 @ 102111m
27 Sep 2023 @ 10103m
27 Sep 2023 @ 100712m
27 Sep 2023 @ 095513d 1h 11m
14 Sep 2023 @ 08443d 20h 30m
10 Sep 2023 @ 12143m 46s 3m
10 Sep 2023 @ 121133s 11m
10 Sep 2023 @ 12003m 50s 3m
10 Sep 2023 @ 115730s 11m
10 Sep 2023 @ 11463m 48s 3m
10 Sep 2023 @ 114327s 11m
10 Sep 2023 @ 11323m 45s 3m
10 Sep 2023 @ 112929s 11m
10 Sep 2023 @ 11183m 37s 4m
10 Sep 2023 @ 111432s 11m
10 Sep 2023 @ 11033m 43s 3m
10 Sep 2023 @ 1100~35s 3d 19h 23m
06 Sep 2023 @ 15373m 45s 4m
06 Sep 2023 @ 153343s 12m
06 Sep 2023 @ 15213m 52s 3m
06 Sep 2023 @ 151842s 12m
06 Sep 2023 @ 15063m 43s 3m
06 Sep 2023 @ 150329s 12m
06 Sep 2023 @ 14513m 41s 3m
06 Sep 2023 @ 144830s 13m
06 Sep 2023 @ 14354m 16s 3m
06 Sep 2023 @ 143231s 11m
06 Sep 2023 @ 14213m 48s 3m
06 Sep 2023 @ 141837s 13m
06 Sep 2023 @ 14054m 14s 3m
06 Sep 2023 @ 140232s 12m
06 Sep 2023 @ 13503m 44s 3m
06 Sep 2023 @ 134731s 11m

Interval Statistics

Interval Count100
Min2m
Max211d 2h 48m
Mean3d 3h 19m
Median5m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
34898 04 Jun 2024 @ 1037 04 Jun 2024 @ 1437 JSJ All closed intervals. Outpost Geyser is still having shorts (S) and longs (L), like last season. Observed eruptions today: SSSLSLSSSLSSLSS LSSLSSSLSSLSSLSS LSLSSLSSLSS. Out of 42 eruptions, 29 were shorts (= 69%) and 13 were longs (= 31%).
27467 08 Aug 2023 @ 1435 08 Aug 2023 @ 1846 JSJ All closed intervals. Still doing alternating longs and shorts.
27429 05 Aug 2023 @ 1437 05 Aug 2023 @ 1709 JSJ All closed intervals. Alternating long (~3 to 4 minute durations) and short eruptions (less than 1 minute long). Long eruptions include splashing from undercut ledge - this is NOT Sentry erupting. Water splashes into Sentry's basin, which was mostly water-filled and had a submerged microbial ring.
26348 15 Jun 2023 @ 1426 15 Jun 2023 @ 1632 JSJ All closed intervals. All eruptions started with low pool splashing. Alternating long and short eruptions - no exceptions. "Short" eruption durations were <1 minute. "Long" eruption durations were ~3 to 4 minutes. Splashing through an undercut geyserite ledge during Outpost eruptions gives the illusion of a separate vent erupting - it's not Sentry Geyser.
25280 30 Apr 2023 @ 1117 --- SantaFe108 Outpost appears to be bimodal. It has weak (minor?) eruptions that don't completely fill the pool and last ~40 seconds followed by about ~3-4 minute intervals. Then it also had 3-4 minute long strong eruptions with Sentry followed by 11-12 minute intervals. EDIT: Sentry is not erupting during the long eruptions of Outpost. The vent that is erupting is part of Outpost's pool, referred to as the "undercut ledge" by James St. John.
14675 19 Jun 2020 @ 0905 19 Jun 2020 @ 0911 jkgood During brief observation it steadily blipped water 6-8 inches
13151 10 Aug 2019 @ 1339 --- JSJ Lightly steaming & grumbling (has been). No eruptions during two hours of observation.
8703 15 Jun 2018 @ 1615 --- JSJ In intermittent, very low splashing.
8639 11 Jun 2018 @ 1803 --- JSJ Outpost Geyser in intermittent light splashing.
2963 04 Jun 2016 @ 1646 04 Jun 2016 @ 1747 JSJ Outpost Geyser observed to have frequent spitting/very low spouting (just visible from boardwalk). Pool/basin on the immediate NNE side of Outpost Geyser was empty.
EntrySourceLinkComment
14 Aug 2014 @ 1556 JSJ https://www.youtube.com/watch?v=hF8cz4TuPsE All 12 clips of this video compilation depict this Outpost eruption, plus Fort Pool's roiling activity once it was water-filled.
Baseline does not exist.