Last Known Eruption
2y 168d 11h 16m ago

Interval Statistics

Interval Count36
Min2h 54m
Max142d 21h 40m
Mean8d 42m
Median1d 3h 50m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
13341 21 Aug 2019 @ 1125 --- Janet Jones “Waterfall Geyser” has good water, bubbles and is starting to lose chunks if the microbe mat.
13081 06 Aug 2019 @ 1130 --- Janet Jones Hoping this number is for “Waterfall Geyser” - It’s bubbling along with Thumb Geyser and many others in the Thumb/Waterfall area. Water level is still well below “full” for this thermal feature, but it’s visible from the boardwalk. Crater is lined with brown microbes, but looks lighter in color than on my last visit a couple or three weeks ago. There’s also a small geyser between Thumb Geyser and Three Lobed Spring that’s been active often in the past that’s more energetically active than I’ve seen in a few years - splashes reach about a foot above ground at times.
7432 26 Sep 2017 @ 1140 --- Janet Jones Empty crater. Water level in Thumb Geyser and UTF Next to Thumb Geyser lower than the orange bacteria lining crater - foam in Thumb Geyser on the side nearest to "Waterfall Geyser."
5383 25 Aug 2017 @ 2000 --- Tara Water level down into the funnel and very quiet. Bubbler in side still active. Water level in Thumb is way up, about 3 inches below WTL-3's rim.
4775 02 Aug 2017 @ 1341 02 Aug 2017 @ 1518 JSJ No Waterfall Geyser eruptions. Pool's water level was fairly low. Couldn't see up-close due to boardwalk closure & construction.
4538 25 Jul 2017 @ 1833 --- JSJ "Waterfall Geyser" (= "North of Thumb Geyser"). Pool's water level fairly low.
4341 20 Jun 2017 @ 1000 20 Jun 2017 @ 1225 Tara Calm pool with occasional lazy bubbles, pool level rose slightly during this time to about the level of the bubbler within the basin.
4308 13 Jun 2017 @ 1325 --- Janet Jones Water levels were higher in "Waterfall Geyser" - enough to cover the first pool behind it (toward the parking lot) and water levels down in Thumb Geyser and the UTF next to Thumb Geyser. Waited until 1400 in the snow and wind until I gave it up for another day.
4202 04 Jun 2017 @ 1014 --- Janet Jones Muddy and little bubbling seen in it or Thumb Geyser. Guessing it erupted overnight.
4147 28 May 2017 @ 1503 --- Janet Jones Steadier boiling in "Waterfall" than this morning. Also more boiling now in Thumb Geyser and the UTF next to it.
4142 28 May 2017 @ 0944 --- Janet Jones Blue with some bubbles rising - water level down a foot or so in Thumb Geyser.
3744 04 Oct 2016 @ 0920 --- bhoppe Based on melted snow in the runoff area, I would guess an eruption occurred sometime overnight or this morning before I arrived at the basin.
3710 24 Sep 2016 @ 0942 --- bhoppe Runoff channel quite wet. Hard to tell if water came from the sky or from the ground.
3542 25 Aug 2016 @ 0928 --- Janet Jones N.O.T. Empty but gurgling heard at depth.
05 Jun 2017 @ 1731 JSJ Video (23 minutes long) of Waterfall Geyser's 5:31 to 6:10 PM eruption on 5 June 2017, plus pre- & post-eruption clips.
23 May 2017 @ 1040 BillJ Roughly mid-eruption (and between bursts), as seen from the upper boardwalk. The burst right before this was MUCH larger than in any other images I've seen, and loud enough to hear from the boardwalk.
05 Jun 2017 @ 1731 JSJ Photo (out of 21) of Waterfall Geyser's 5:31 to 6:10 PM eruption on 5 June 2017.
25 Aug 2016 @ 1000 JSJ Video by Janet White of Waterfall Geyser's late morning eruption on 25 August 2016.
05 Nov 2016 @ 1330 JSJ Video by Janet White of Waterfall Geyser's early afternoon eruption on 5 November 2016.
Baseline does not exist.

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