Last Known Eruption
4y 303d 4h 12m ago

Interval Statistics

Interval Count34
Min13m
Max20y 41d 4h 51m
Mean1y 109d 21h 1m
Median1d 15h 38m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
18633 24 Jul 2021 @ 0855 --- LynnS Water is about 3 feet below rim
18629 24 Jul 2021 @ 0610 --- LynnS Completely empty, absolutely no water visible
18193 29 Jun 2021 @ 1732 --- Tara filled with runoff from Spasm & overflowing
18072 24 Jun 2021 @ 0804 --- Graham Very high water, near the rim. Spasm out of sight. First time I have seen Jelly up this trip.
14856 02 Jul 2020 @ 0908 --- Graham No water visible at all.
14663 18 Jun 2020 @ 0705 --- LynnS Crater has small amount of water in bottom of crater
13876 04 Oct 2019 @ 1800 --- Tara Full & overflowing with Spasm flowing into it
11541 03 Jun 2019 @ 0527 --- Graham High water, beach almost covered. Spasm drained. Water level is dropping. 0609 dropped to the white ring at the top of the vent, at the end of the beach. 0645 stopped dropping. 0713 rising close to the white ring.
11471 01 Jun 2019 @ 0800 --- Graham Water at the transition from the flat beach to the inner tube. Spasm empty. 0840 slowly rising, Spasm still off. Beach is completley coverwd by 0945. 1012 light convection on the pool. 1019 Spasm runoff starts to flow into Jelly. 1102 overflowing toward Frolic. This is the first time I have seen Jelly fill this week on its own.
11459 31 May 2019 @ 1457 --- Graham High water and Spasm is empty, Spasm likely ended an eruption recently. 1600 water has dropped down into the smaller low tube. Filled up to the top of the white ring 1729, Spasm still not in overflow.
10643 21 Oct 2018 @ 0851 --- rbwhitaker No water visible. Crater and surrounding area dry.
629 09 Jan 2011 @ 1530 --- BoekelUpload full 1530
7546 17 Apr 1976 @ 0000 17 Apr 1976 @ 2359 JSJ 17 April 1976 - Jelly Geyser became active with full eruptions after being dormant most of the winter.
No attachments for this geyser.
Baseline does not exist.