Last Known Eruption
19h 8m ago

Interval Statistics

Interval Count100
Min35m
Max1d 23h 19m
Mean6h 53m
Median1h 38m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
40430 16 Jul 2025 @ 1253 --- minissa Almost wrote this in as a dual with Plate but I only saw the one burst out of Slot. It did finally allow me to understand the spatial relationship between Plate, Slot, and Sponge. Would have been a great screen shot if I'd acted a little faster!
39907 17 Jun 2025 @ 0810 --- JarnoO (wc) Slot's activity since late December has gradually carved out a broad crater with steep walls in the larger Sponge mound area. The crater floor is just a tad higher than its vent, again separated by a steep wall. It was non-existent prior to this.
38832 04 May 2025 @ 1528 --- K.Cooper Filled briefly with water before draining. Coming back a minute later Plate very low water
38830 04 May 2025 @ 1516 --- K.Cooper empty
38467 18 Apr 2025 @ 1142 --- SantaFe108 Empty.
38100 25 Dec 2024 @ 1428 25 Dec 2024 @ 1530 aferrara 1428-empty, 1447-first water visible, 1452-pulsing and splashing, 1455-Overflow that generally decreased until 1530, still pulsing and sometimes splashing
38099 25 Dec 2024 @ 1212 --- Pholli slot now completely full. pushing sizable waves every few seconds. unsure if thumping. cannot be heard over sponge and pump
38098 25 Dec 2024 @ 1209 --- Pholli filling and pushing waves
38088 25 Dec 2024 @ 1031 --- K.Cooper empty
38081 24 Dec 2024 @ 1319 --- K.Cooper Milky and having eruptions/bursts to about four feet every minute or two
38057 21 Dec 2024 @ 1038 --- K.Cooper dropping
38056 21 Dec 2024 @ 1026 --- K.Cooper splashed
38053 21 Dec 2024 @ 0934 --- K.Cooper In overflow and pulsing
37989 12 Dec 2024 @ 1218 --- K.Cooper Sloshing
37783 27 Oct 2024 @ 1150 --- Janet Jones Overflowing and pulsing. I watched for a couple of minutes and stopped by again on my way down basin and it was still pulsing in the crater.
37551 13 Oct 2024 @ 1629 --- K.Cooper In overflow. bubbling lightly and the entire pool is bouncing up and down
37512 10 Oct 2024 @ 1450 --- SantaFe108 Blue in vent, transitioning to brown around the edges, blooping with overflow.
37212 28 Sep 2024 @ 1548 --- User34 Overflowing, no bacteria around vent
16870 16 Apr 2021 @ 1622 --- User34 Full, water from uphill flowing through
5483 28 Aug 2017 @ 1227 --- udo Bubbling water visible about a foot below rim..
Baseline does not exist.