Last Known Eruption
150d 9h 46m ago

Latest Eruptions

Eruption DurationInterval
31 Oct 2022 @ 0940>2m 9m
31 Oct 2022 @ 09319d 19h 42m
21 Oct 2022 @ 134910m
21 Oct 2022 @ 133912d 22h 10m
08 Oct 2022 @ 15299m
08 Oct 2022 @ 15205h 52m
08 Oct 2022 @ 092816h 11m
07 Oct 2022 @ 17179m
07 Oct 2022 @ 170813m
07 Oct 2022 @ 165510m
07 Oct 2022 @ 16458m
07 Oct 2022 @ 16378m
07 Oct 2022 @ 16292h 3m
07 Oct 2022 @ 142620h 34m
06 Oct 2022 @ 17529m
06 Oct 2022 @ 174310m
06 Oct 2022 @ 17331d 6h 41m
05 Oct 2022 @ 105213m
05 Oct 2022 @ 103915m
05 Oct 2022 @ 10241d 20h 30m
03 Oct 2022 @ 13549m
03 Oct 2022 @ 13458m
03 Oct 2022 @ 13373h 27m
03 Oct 2022 @ 101021h 3m
02 Oct 2022 @ 130712m
02 Oct 2022 @ 12559m
02 Oct 2022 @ 124610m
02 Oct 2022 @ 123617m
02 Oct 2022 @ 121921h 3m
01 Oct 2022 @ 15169m
01 Oct 2022 @ 15074d 5h 19m
27 Sep 2022 @ 0948 ie10d 16h 47m
16 Sep 2022 @ 170112m
16 Sep 2022 @ 164912m
16 Sep 2022 @ 1637 ie5d 3h 42m
11 Sep 2022 @ 1255 ie1h 42m
11 Sep 2022 @ 1113 ie23h 27m
10 Sep 2022 @ 11462d 22h 8m
07 Sep 2022 @ 133813m
07 Sep 2022 @ 132511m
07 Sep 2022 @ 13141d 2h 28m
06 Sep 2022 @ 10462d 13m
04 Sep 2022 @ 103314h 42m
03 Sep 2022 @ 195114m
03 Sep 2022 @ 1937 ie4h 2m
03 Sep 2022 @ 15351d 4h 55m
02 Sep 2022 @ 104017h 39m
01 Sep 2022 @ 17011d 5h 4m
31 Aug 2022 @ 11571d 20h 31m
29 Aug 2022 @ 15263h 52m
29 Aug 2022 @ 1134 ie18h 5m
28 Aug 2022 @ 17293h 48m
28 Aug 2022 @ 13418m
28 Aug 2022 @ 133311m
28 Aug 2022 @ 1322 ie21h 51m
27 Aug 2022 @ 15314d 2h 33m
23 Aug 2022 @ 1258 ie3d 21h 12m
19 Aug 2022 @ 1546 ie3d 2h 26m
16 Aug 2022 @ 13204h 47m
16 Aug 2022 @ 0833 wc18h 4m
15 Aug 2022 @ 14291d 1h 18m
14 Aug 2022 @ 13112h 30m
14 Aug 2022 @ 10416d 23h 31m
07 Aug 2022 @ 1110 wc14d 19h 32m
23 Jul 2022 @ 15383d 23h 26m
19 Jul 2022 @ 161210d 21h 15m
08 Jul 2022 @ 185710h 22m
08 Jul 2022 @ 0835 wc3m
08 Jul 2022 @ 083213h 11m
07 Jul 2022 @ 1921~7m 6d 9h 57m
01 Jul 2022 @ 0924 wc23h 31m
30 Jun 2022 @ 0953 ie1d 12h 35m
28 Jun 2022 @ 2118 ie38d 6h 27m
21 May 2022 @ 1451 ns55m
21 May 2022 @ 1356 ns18h 48m
20 May 2022 @ 19081h 28m
20 May 2022 @ 17406m 40m
20 May 2022 @ 1700 ie6h 43m
20 May 2022 @ 101719m
20 May 2022 @ 095819d 21h 15m
30 Apr 2022 @ 1243 wc10m
30 Apr 2022 @ 1233 ie1d 3h 0m
29 Apr 2022 @ 09335d 16h 7m
23 Apr 2022 @ 172615d 2h 8m
08 Apr 2022 @ 1518 ie wc16d 20h 16m
22 Mar 2022 @ 1902 ie wc56d 42m
25 Jan 2022 @ 1720 wc4d 2h 41m
21 Jan 2022 @ 143926m
21 Jan 2022 @ 14134m
21 Jan 2022 @ 140939m
21 Jan 2022 @ 1330 A83d 1h 38m
30 Oct 2021 @ 12522h 37m
30 Oct 2021 @ 101523h 40m
29 Oct 2021 @ 10351d 20h 42m
27 Oct 2021 @ 135323h 25m
26 Oct 2021 @ 142817m
26 Oct 2021 @ 14111h 48m
26 Oct 2021 @ 122315m
26 Oct 2021 @ 120818h 28m
25 Oct 2021 @ 174045d 2h 13m

Interval Statistics

Interval Count100
Min3m
Max83d 1h 38m
Mean4d 3h 46m
Median11h 46m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
20742 21 Jan 2022 @ 1438 --- aferrara Churning and thumping
17641 10 Jun 2021 @ 1600 10 Jun 2021 @ 1630 Graham No eruptions of Three Crater or Middle Sister seen during this time.
17194 26 May 2021 @ 1800 26 May 2021 @ 1902 JSJ All closed intervals. Fairly regular erupter. Most durations are a bit over a minute. Waves from splashing result in slight overflow of North Sister Spring's basin.
16112 13 Sep 2020 @ 1642 --- Art Pool calm
13806 26 Sep 2019 @ 1548 26 Sep 2019 @ 1646 DanS No eruptions. Domed water at 1616. Windy.
13028 04 Aug 2019 @ 1029 04 Aug 2019 @ 1626 JSJ All closed intervals. Have never before seen this geyser be so regular in intervals and durations. All were ~1 to 2 minutes long. Usual spaced splashing.
12367 30 Dec 1993 @ 0000 30 Dec 1993 @ 2359 JarnoO I's 7-9m; d 1-3m; height 3'
EntrySourceLinkComment
25 Jul 2020 @ 0714 JarnoO https://www.youtube.com/watch?v=ozICoRgkku8 Fragment of this eruption as seen from the webcam, by JoeN.
25 Apr 2020 @ 0700 JoeN https://youtu.be/5b0T-qkV6Rk 3c video
13 Mar 2020 @ 1253 ltgangi https://youtu.be/TDtoD3iQC-Y Three crater
04 Aug 2016 @ 1853 JSJ https://www.youtube.com/watch?v=mNOUI3gd1Tk#t=3m57s Clip 6 of this video compilation (time stamp 3:57 to 6:12) shows Three Crater Geyser's 6:53 to 7:01 PM eruption on 4 August 2016. Remaining clips show 2 other eruptions that evening.
08 Jun 2016 @ 1919 JSJ https://www.youtube.com/watch?v=mNOUI3gd1Tk#t=1m01s Clips 3-5 of this video compilation (time stamp 1:01 to 3:56) show Three Crater Geyser's 7:19 to 7:25 PM eruption on 8 June 2016.
11 Jul 2014 @ 2036 JSJ https://www.youtube.com/watch?v=mNOUI3gd1Tk#t=0m40s Clip 2 of this video compilation (time stamp 0:40 to 1:00) shows Three Crater Geyser's 8:36 to 8:44 PM eruption on 11 July 2014.
08 Jul 2014 @ 1742 JSJ https://www.youtube.com/watch?v=mNOUI3gd1Tk Clip 1 of this video compilation (beginning to time stamp 0:39) shows Three Crater Geyser's 5:42 to 5:44 PM eruption on 8 July 2014.
08 Jul 2014 @ 1804 JSJ https://www.flickr.com/photos/jsjgeology/15292798176 Photo (1 of 3) of Three Crater Geyser's 6:04 PM-onward eruption on 8 July 2014.
Baseline does not exist.