Last Known Eruption
20d 21h 50m ago

Interval Statistics

Interval Count100
Min2m
Max215d 21h 6m
Mean11d 56m
Median4h 16m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
40524 20 Jul 2025 @ 1630 20 Jul 2025 @ 1845 nails Occasionally steaming more heavily, but no observed jets of water.
39596 31 May 2025 @ 1844 --- mhreed Frequent large jets
39477 29 May 2025 @ 0947 --- MAB possible vertical spike very steamy
39067 15 May 2025 @ 0914 --- mhreed Milky blue, fountains going, occasional bursting to a few feet seen
38437 10 Apr 2025 @ 1400 10 Apr 2025 @ 1600 SantaFe108 No eruptions during this period.
37924 07 Nov 2024 @ 1142 --- SantaFe108 Erupting every 2-3 minutes, highest bursts ~30ft tall.
29053 22 Oct 2023 @ 1320 --- SantaFe108 Erupting every few minutes or so. Some spikes are reaching above the new growth trees.
22695 19 Jul 2022 @ 0846 19 Jul 2022 @ 1209 nails Probably erupting more often than I am recording. Location of feature probably obscures some activity. Didn’t attempt to log every big spike.
22539 13 Jul 2022 @ 0940 13 Jul 2022 @ 1344 cb Very active throughout this time frame. Bursts at and at times above the new growth tree line.
18453 16 Jul 2021 @ 0844 16 Jul 2021 @ 1204 nails May have been more frequent at earlier part of the morning but hard to see with abundant steam in basin. Once it warmed up and steam cleared out it seemed frequently active. Has been having several sets of spiky bursts with pauses and then more bursts for about 2 minutes. Then a few minutes with no activity for a few minutes. Hard to tell from boardwalk if these are separate eruptions with minute long intervals or sets of bursts starting about every six minutes.
17068 12 May 2021 @ 1704 --- MAB Seen IE frequently during my stay- many tall vertical bursts and tracers seen from Constant- the angled bursts difficult to see due to steam
2939 01 Jun 2016 @ 1519 --- MAB huge splash seen from overlook - it might have been something else from that angle
31205 15 Jan 1982 @ 1200 --- research-mab January 15th, 1982 - no time noted - Collapsed Cave 200º ie dark blue slightly turbid H2-0. Runoff channel is bright orange now.
5374 17 Aug 1981 @ 1200 --- research-mab 8/17/1981- no time noted - Collapsed Cave Spring B) described on Aug 6 is much more active today. Its water is very light gray, & almost clear and has bursts of up to 20’. There was also a ~1min period of quiescence before the bursts would occur again. A geyser! This geyser can be seen from the Whirligig area of bd. wk, appears No of Blue G - commonly called “Collapsed Cave”
No attachments for this geyser.
Baseline does not exist.