| Interval Count | 100 |
| Min | 3m |
| Max | 83d 1h 38m |
| Mean | 4d 8h 54m |
| Median | 3h 36m |
| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
|---|---|---|---|---|
| 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' |
| Entry | Source | Link | Comment |
|---|---|---|---|
| 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. |