Last Known Eruption
6d 18h 47m ago

Latest Eruptions

Eruption DurationInterval
14 Oct 2020 @ 0655 ie23h 11m
13 Oct 2020 @ 0744 ie2d 14h 21m
10 Oct 2020 @ 1723 ie4d 13m
06 Oct 2020 @ 1710 ie2d 9h 15m
04 Oct 2020 @ 0755 ie2d 17h 1m
01 Oct 2020 @ 14547d 7h 54m
24 Sep 2020 @ 0700 ie3d 23h 49m
20 Sep 2020 @ 0711 ie1d 18h 12m
18 Sep 2020 @ 125918h 3m
17 Sep 2020 @ 185610h 25m
17 Sep 2020 @ 08314d 51m
13 Sep 2020 @ 0740 ie5d 23h 53m
07 Sep 2020 @ 0747 ie21h 28m
06 Sep 2020 @ 101915h 1m
05 Sep 2020 @ 19186d 2h 23m
30 Aug 2020 @ 1655 ie1d 9h 39m
29 Aug 2020 @ 0716 ie>3h 58m 1d 17h 30m
27 Aug 2020 @ 13463h 32m 6h 12m
27 Aug 2020 @ 0734 ie1d 14h 7m
25 Aug 2020 @ 17271h 50m 5d 2h 9m
20 Aug 2020 @ 1518 ie2d 21h 50m
17 Aug 2020 @ 172832d 6h 15m
16 Jul 2020 @ 1113 ie4d 3h 35m
12 Jul 2020 @ 0738 ie12d 14h 55m
29 Jun 2020 @ 16431d 10h 29m
28 Jun 2020 @ 0614 ie14h 6m
27 Jun 2020 @ 160858m 5d 22h 5m
21 Jun 2020 @ 1803 ie8d 8h 23m
13 Jun 2020 @ 0940 A6d 17h 44m
06 Jun 2020 @ 15562h 1m
06 Jun 2020 @ 1355 ie2d 5h 56m
04 Jun 2020 @ 0759 ie16d 18h 12m
18 May 2020 @ 1347 ? wc117d 22h 20m
21 Jan 2020 @ 1427105d 23h 50m
07 Oct 2019 @ 153710d 7h 2m
27 Sep 2019 @ 0835 ie8d 17h 30m
18 Sep 2019 @ 15052d 7h 24m
16 Sep 2019 @ 074114h 40m
15 Sep 2019 @ 1701 ie11d 37m
04 Sep 2019 @ 162420h 40m
03 Sep 2019 @ 1944 ie4d 1h 6m
30 Aug 2019 @ 18382d 1h 30m
28 Aug 2019 @ 1708~15m 1d 9h 44m
27 Aug 2019 @ 07241h 27m 1d 15h 7m
25 Aug 2019 @ 1617~15m 1d 5h 32m
24 Aug 2019 @ 10454h 25m 7d 22h 32m
16 Aug 2019 @ 12136d 35m
10 Aug 2019 @ 11385d 19h 15m
04 Aug 2019 @ 1623 ie3d 6h 57m
01 Aug 2019 @ 0926 ie1d 19h 49m
30 Jul 2019 @ 13372d 21h 0m
27 Jul 2019 @ 16371d 23h 54m
25 Jul 2019 @ 16436d 1h 58m
19 Jul 2019 @ 1445 ie4d 50m
15 Jul 2019 @ 1355 ie2h 20m
15 Jul 2019 @ 1135 ie1d 22h 42m
13 Jul 2019 @ 1253 ie4d 18h 44m
08 Jul 2019 @ 1809 ie13d 7h 33m
25 Jun 2019 @ 10361h 45m 17h 59m
24 Jun 2019 @ 16372h 14m 3d 19h 58m
20 Jun 2019 @ 20391d 12h 23m
19 Jun 2019 @ 0816 ns1d 15h 40m
17 Jun 2019 @ 1636 ie1d 22h 39m
15 Jun 2019 @ 1757 ie8h 17m
15 Jun 2019 @ 0940 ie1d 21h 1m
13 Jun 2019 @ 1239 ie10d 4m
03 Jun 2019 @ 123515d 18h 13m
18 May 2019 @ 18224d 1h 23m
14 May 2019 @ 1659 ie2d 1h 11m
12 May 2019 @ 15487d 1h 17m
05 May 2019 @ 1431182d 5h 34m
04 Nov 2018 @ 0757 ie28d 23h 9m
06 Oct 2018 @ 0948 ie3d 20h 52m
02 Oct 2018 @ 1256 ns4d 20h 46m
27 Sep 2018 @ 161018d 21h 4m
08 Sep 2018 @ 19065d 1h 54m
03 Sep 2018 @ 171222m 2d 10h 45m
01 Sep 2018 @ 0627 ie>14h 44m
31 Aug 2018 @ 154328m 21h 24m
30 Aug 2018 @ 181910h 21m
30 Aug 2018 @ 075812h 34m
29 Aug 2018 @ 19243d 11h 26m
26 Aug 2018 @ 0758 ie11h 50m
25 Aug 2018 @ 20081d 10h 21m
24 Aug 2018 @ 09472d 15h 36m
21 Aug 2018 @ 1811 ie1d 8h 3m
20 Aug 2018 @ 1008 ie19h 24m
19 Aug 2018 @ 14446d 7h 30m
13 Aug 2018 @ 0714 ie19h 54m
12 Aug 2018 @ 1120 ie1d 19h 40m
10 Aug 2018 @ 1540 ie1d 19h 23m
08 Aug 2018 @ 2017 ie40m 6d 4h 44m
02 Aug 2018 @ 15333d 19h 14m
29 Jul 2018 @ 2018:41 ns9d 18m
20 Jul 2018 @ 20005d 3h 28m
15 Jul 2018 @ 1632 ini12d 6h 48m
03 Jul 2018 @ 09446d 19h 5m
26 Jun 2018 @ 143939m 21d 23h 7m
04 Jun 2018 @ 1532 ns16d 18h 47m
18 May 2018 @ 20455d 4h 13m

Interval Statistics

Interval Count100
Min2h 1m
Max182d 5h 34m
Mean8d 20h 18m
Median3d 2h 23m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16435 15 Oct 2020 @ 1840 15 Oct 2020 @ 1915 William pool level barely within view. viewed at 18:40 and then again at 19:15.
16263 26 Sep 2020 @ 1504 --- Ajw pool full with mild bubbling in center.
16249 24 Sep 2020 @ 1905 --- William water level barely visible in crater, runoff area contains water in a few areas
16205 20 Sep 2020 @ 1115 --- William starting to boil from NV and rise from about 2' below inner rim
16172 18 Sep 2020 @ 1042 --- CraigC rising, about 2 feet below inner rim, strong boiling from north vent
16163 18 Sep 2020 @ 0738 --- CraigC as empty as I have ever observed, could not see the water level
16084 12 Sep 2020 @ 1106 --- TheHikingDude Pool full. gently boiling
16055 11 Sep 2020 @ 1007 --- CraigC full pool, boiling in north vent. 1020 small boil from south
13045 05 Aug 2019 @ 1737 --- KarlH Water is up approx 3 hours into Grotto eruption.
12103 04 Jul 2019 @ 0855 04 Jul 2019 @ 0900 Detour66 Spa is overflowing, left and center vents active.
11673 09 Jun 2019 @ 1318 --- User34 In overflow, boiling from all three vents
11537 03 Jun 2019 @ 0604 --- Kyle runoff channel is wet and water is pooled in sinter around the crater
11132 29 Apr 2019 @ 1516 --- Polly Spa up with strong bubbling from 2 vents and tiny intermittent bubbles from the third
10928 27 Jan 2019 @ 0845 --- Graham Full and blooping
10546 04 Oct 2018 @ 0827 --- William Water level high with two consistent areas of 2’ diameter boil in the center of pool.
10484 27 Sep 2018 @ 1904 --- Tara Overflowing and boiling from both vents.
10060 06 Sep 2018 @ 0917 --- Micah Kipple Rapidly filling with a constant boil in the left vent. Possible startup sequence.
9722 15 Aug 2018 @ 0820 --- c.barwin full and close to overflowing
9674 12 Aug 2018 @ 1004 --- Tom C. Spa was in overflow from 1004 through Grotto start (1019). Boiling in left vent only during this period.
8817 19 Jun 2018 @ 0945 --- Polly Spa full with one very small boil.
8968 08 Jun 2018 @ 1331 --- Polly Spa overflowing
8528 07 Jun 2018 @ 1600 --- Polly Spa filling quickly.
8232 18 May 2018 @ 2040 --- Tara Full and bubbling, recently started overflowing.
8156 11 May 2018 @ 1120 11 May 2018 @ 1126 Tara Rising slowly with frequent heavy bubbling.
8148 10 May 2018 @ 1910 10 May 2018 @ 1935 Tara Was overflowing and boiling at 1910; after Rocket, water was very calm and about 2 feet down with the level gradually dropping.
6365 14 Sep 2017 @ 0706 --- Graham Overflowing.
6253 10 Sep 2017 @ 0950 --- Polly Puddles around edges. Left Vent bubbly with some small burts.
4556 27 Jul 2017 @ 1335 27 Jul 2017 @ 1347 S.Glasser filling with decent boils from left vent, no chasms in water level in 10m
4086 12 May 2017 @ 1720 --- mhreed Low pool and boiling heavily from left vent. No right vent.
4019 29 Apr 2017 @ 1010 --- RMichaels In overflow (grotto off since ~0730).
2947 02 Jun 2016 @ 1449 --- BobInSLC empty but wet runoff channels
2813 04 May 2016 @ 1058 --- udo Post eruptive at 1058. Runoff channel wet, water level low. Water was high approx 0930.
2750 17 Apr 2016 @ 1700 --- RMichaels Spa was overflowing and had several widely spaced foot-high bubbles, but didn't progress to an actual eruption.
976 25 Jun 2008 @ 0000 25 Jun 2008 @ 2359 BoekelUpload ie most of day
853 03 Jul 2006 @ 0700 --- Tara Spa full and pulsating at 0700; one burst to about 5 feet seen but not in eruption.
15805 17 Feb 1997 @ 0000 17 Feb 1997 @ 2359 JarnoO active
15245 20 Jun 1996 @ 0000 20 Jun 1996 @ 2359 JarnoO active
14396 28 Sep 1995 @ 0000 28 Sep 1995 @ 2359 JarnoO active
14335 22 Jul 1995 @ 0000 22 Jul 1995 @ 2359 JarnoO active
14316 01 Jun 1995 @ 0000 01 Jun 1995 @ 2359 JarnoO active
14289 17 Mar 1995 @ 0000 17 Mar 1995 @ 2359 JarnoO active
12343 31 Oct 1993 @ 0815 --- JarnoO drained and finished at 0815
5581 22 Aug 1992 @ 0000 22 Aug 1992 @ 2359 JarnoO active
EntrySourceLinkComment
02 Jul 2016 @ 1927 JSJ https://www.flickr.com/photos/jsjgeology/27720902544 Photo (# 5 of 14) of Spa Geyser's evening eruption on 2 July 2016.
02 Jul 2016 @ 1927 JSJ https://www.youtube.com/watch?v=FrNewmxwSAI Video compilation of Spa Geyser's evening eruption on 2 July 2016.
07 Jul 1993 @ 1158 JSJ https://www.youtube.com/watch?v=ue3m3bxH15I Video by David Schwarz of Spa Geyser's late morning eruption on 7 July 1993.
28 Aug 2014 @ 1126 Micah Kipple https://www.flickr.com/photos/patrickcarneyphotography/15007379757 flickr.
BaselineDistance (ft)Description
Bike Path Towards Riverside 50On the trail headed towards Riverside