| Eruption | Duration | Interval |
|---|---|---|
| 28 May 2021 @ 1741 ie | 287d 12m | |
| 14 Aug 2020 @ 1729 ie | 1y 10d 2h 30m | |
| 05 Aug 2019 @ 1459 ie | 52d 1h 18m | |
| 14 Jun 2019 @ 1341 ie | 314d 1h 54m | |
| 04 Aug 2018 @ 1147 ie | 16h 43m | |
| 03 Aug 2018 @ 1904 ie | 1d 22m | |
| 02 Aug 2018 @ 1842 ie | 51d 5h 42m | |
| 12 Jun 2018 @ 1300 ie | 1d 20h 30m | |
| 10 Jun 2018 @ 1630 ie | 1y 352d 1h 28m | |
| 23 Jun 2016 @ 1502 ie | 319d 17h 57m | |
| 08 Aug 2015 @ 2105 ie | 7h 28m | |
| 08 Aug 2015 @ 1337 | 7m | |
| 08 Aug 2015 @ 1330 | 6m | |
| 08 Aug 2015 @ 1324 | 6m | |
| 08 Aug 2015 @ 1318 ns | 30d 15h 42m | |
| 08 Jul 2015 @ 2136 ie | 2h 25m | |
| 08 Jul 2015 @ 1911 | 6m | |
| 08 Jul 2015 @ 1905 | 7m | |
| 08 Jul 2015 @ 1858 | 333d 6h 7m | |
| 09 Aug 2014 @ 1251 | 8m | |
| 09 Aug 2014 @ 1243 | 8m | |
| 09 Aug 2014 @ 1235 | 312d 20h 21m | |
| 30 Sep 2013 @ 1614 ie |
| Interval Count | 22 |
| Min | 6m |
| Max | 1y 352d 1h 28m |
| Mean | 127d 3h 20m |
| Median | 1d 10h 26m |
| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
|---|---|---|---|---|
| 2054 | 08 Aug 2015 @ 1321 | --- | JSJ | Vents 4, 5, and 6 of Gray Bulger Geyser (immediately east & southeast of the head of the J-shaped pool) were engaged in low to moderately low perpetual spouting, as usual. Vent IDs from: Gryc, S. 2016 (dated 2015). Firehole Lake geyser delights (but which geyser is it?). Geyser Gazer Sput 29(6): 5-8. |
| 2670 | 03 Jun 2014 @ 1718 | --- | JSJ | Vents 4, 5, and 6 of Gray Bulger Geyser (immediately east & southeast of the head of the J-shaped pool) were engaged in low to moderately low perpetual spouting, as usual. Vent IDs from: Gryc, S. 2016 (dated 2015). Firehole Lake geyser delights (but which geyser is it?). Geyser Gazer Sput 29(6): 5-8. |
| 2671 | 31 May 2013 @ 2000 | --- | JSJ | Vents 4, 5, and 6 of Gray Bulger Geyser (immediately east & southeast of the head of the J-shaped pool) were engaged in low to moderately low perpetual spouting, as usual. Vent IDs from: Gryc, S. 2016 (dated 2015). Firehole Lake geyser delights (but which geyser is it?). Geyser Gazer Sput 29(6): 5-8. |
| 709 | 22 Sep 1976 @ 0000 | 22 Sep 1976 @ 1200 | BoekelUpload | Active am |
| 708 | 11 Aug 1976 @ 0000 | 11 Aug 1976 @ 2359 | BoekelUpload | side jetting vent would sometimes take over function shooting to approx 20-25 ft for 5-10s TSB |
| 707 | 06 Aug 1976 @ 1200 | 06 Aug 1976 @ 2359 | BoekelUpload | Evening. At least 20 ft |
| Entry | Source | Link | Comment |
|---|---|---|---|
| 14 Aug 2020 @ 1729 | JSJ | https://www.youtube.com/watch?v=S1vBDDGs9Es#t=0m34s | Video showing Gray Bulger Geyser erupting during the late afternoon of 14 August 2020. |
| 05 Aug 2019 @ 1459 | JSJ | https://www.flickr.com/photos/jsjgeology/48555500497 | Photo (out of 5) of Gray Bulger Geyser erupting during the afternoon of 5 August 2019. |
| 14 Jun 2019 @ 1341 | JSJ | https://www.youtube.com/watch?v=iDtgJMhjl_o | Video compilation showing Gray Bulger Geyser erupting during the afternoon of 14 June 2019. |
| 04 Aug 2018 @ 1147 | JSJ | https://www.youtube.com/watch?v=WJEssyTMIG4#t=5m04s | Clips 15-19 of this video compilation (= time stamp 5:04 to the end) show Gray Bulger Geyser's activity in the earliest afternoon of 4 August 2018. |
| 03 Aug 2018 @ 1904 | JSJ | https://www.youtube.com/watch?v=WJEssyTMIG4#t=2m44s | Clips 8-14 of this video compilation (= time stamp 2:44 to 5:03) show Gray Bulger Geyser's activity in the evening of 3 August 2018. |
| 02 Aug 2018 @ 1842 | JSJ | https://www.youtube.com/watch?v=WJEssyTMIG4 | Clips 1-7 of this video compilation (= beginning to time stamp 2:43) show Gray Bulger Geyser's activity in the evening of 2 August 2018. |
| 10 Jun 2018 @ 1630 | JSJ | https://www.flickr.com/photos/jsjgeology/43327450431 | Photo (out of 4) of Gray Bulger Geyser in eruption during the afternoon of 10 June 2018. |
| 12 Jun 2018 @ 1300 | JSJ | https://www.youtube.com/watch?v=6BgJ13qkTkc | Time lapse video of Gray Bulger Geyser's activity during the afternoon of 12 June 2018. |