Last Known Eruption
19y 263d 2h 19m 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
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.