Last Known Eruption
23y 112d 6h 36m ago

Latest Eruptions

Eruption DurationInterval
19 Jun 2001 @ 114022d 18h 55m
27 May 2001 @ 1645

Interval Statistics

Interval Count1
Min22d 18h 55m
Max22d 18h 55m
Mean22d 18h 55m
Median22d 18h 55m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
37262 29 Sep 2024 @ 1514 --- Janet Jones Hotter than last week when it was completely green. This week it was much more clear, but there were still microbes on the side farthest from the boardwalk.
37110 21 Sep 2024 @ 1144 --- Janet Jones Collapsing Pool is below overflow and has turned green since I last saw it a week ago. It was below overflow last week as well when the microbes in the overflow channel were drying out.
36468 19 Aug 2024 @ 1214 --- Craigmon99 In overflow. Bright blue. Slightly murky. Boiling from multiple points. More vigorous in center
36229 02 Aug 2024 @ 1803 --- bhoppe overflowing out south side of pool
35539 24 Jun 2024 @ 2033 --- Craigmon99 Runoff now 20 feet down channel
35534 24 Jun 2024 @ 1915 --- Craigmon99 In overflow?? Runoff channel beginning to flow about 6 feet from pools edge . Runoff channel as a whole is damp..
35532 24 Jun 2024 @ 1859 --- Craigmon99 Boiling from 3 points inside the main crater. Majority of bubbles from center. About as much as Ledge Spring boiling
35504 24 Jun 2024 @ 0647 --- Craigmon99 Bubbling in many spots. Subaudible thumping noise
26930 08 Jul 2023 @ 1613 --- nails About two feet below overflow. Light blue water, bubbling in several places. Boardwalk railing sign says “Collapsing Spring”
4315 14 Jun 2017 @ 1430 --- JSJ 162 degrees Fahrenheit (thermal camera reading). Bluish-colored pool (see attachment). Overflowing - runoff draining into Surging Spring.
4309 13 Jun 2017 @ 1319 --- Janet Jones Boiling harder than on my last visit on 9 June 2017. At 1348, the water started to wobble in the crater like Oval Spring in the Upper Geyser Basin can do. This only lasted less than a minute and when it quit, the boiling lessened for a short time before starting up again.
4285 09 Jun 2017 @ 1010 --- Janet Jones On the 4th it had quite a bit of green to it, but today it was turbid and very blue.
No attachments for this geyser.
Baseline does not exist.