Last Known Eruption
7h 40m ago

Latest Eruptions

Eruption DurationInterval
13 Aug 2025 @ 19561d 22h 44m
11 Aug 2025 @ 2112 ie4d 12h 18m
07 Aug 2025 @ 0854 ns20h 54m
06 Aug 2025 @ 1200 A21h 0m
05 Aug 2025 @ 1500 A1d 19h 47m
03 Aug 2025 @ 1913 ie22h 7m
02 Aug 2025 @ 21062d 18h 2m
31 Jul 2025 @ 0304 ie1d 6h 43m
29 Jul 2025 @ 2021 ie2d 11h 36m
27 Jul 2025 @ 0845 ie2d 7m
25 Jul 2025 @ 0838 ns18h 20m
24 Jul 2025 @ 1418 ie20h 51m
23 Jul 2025 @ 1727 ie1d 19h 41m
21 Jul 2025 @ 2146 ie4d 10h 55m
17 Jul 2025 @ 1051 ns2d 51m
15 Jul 2025 @ 1000 A20h 35m
14 Jul 2025 @ 1325 ie1d 1h 42m
13 Jul 2025 @ 1143 ie2d 2h 9m
11 Jul 2025 @ 0934 ie17h 56m
10 Jul 2025 @ 1538 ns23h 29m
09 Jul 2025 @ 16091h 46m 23h 47m
08 Jul 2025 @ 1622 ie1d 12m
07 Jul 2025 @ 161016h 10m
07 Jul 2025 @ 0000 A2d 1h 0m
04 Jul 2025 @ 2300 ie2d 23h 0m
02 Jul 2025 @ 0000 A3d 6h 37m
28 Jun 2025 @ 1723 ie23h 54m
27 Jun 2025 @ 1729 ie4d 1h 7m
23 Jun 2025 @ 1621:162h 6m 2d 8h 3m
21 Jun 2025 @ 0818 ie5d 13h 34m
15 Jun 2025 @ 18442h 22m 4d 3h 56m
11 Jun 2025 @ 1447:50 ns3d 2h 3m
08 Jun 2025 @ 1244 ie1d 16h 51m
06 Jun 2025 @ 1952:11 ie1d 13h 44m
05 Jun 2025 @ 0608 ie1d 14h 57m
03 Jun 2025 @ 1511 ie2d 10h 22m
01 Jun 2025 @ 0449 ie1d 23h 58m
30 May 2025 @ 0451 ie3d 8h 4m
26 May 2025 @ 20474d 4h 55m
22 May 2025 @ 1552 ie5d 15h 52m
17 May 2025 @ 0000 A5d 12h 33m
11 May 2025 @ 1127 ie6d 16h 27m
04 May 2025 @ 1900 ie7d 19h 0m
27 Apr 2025 @ 0000 A100d 5h 56m
16 Jan 2025 @ 1704 ie3d 7h 28m
13 Jan 2025 @ 0936 ie6d 9h 36m
07 Jan 2025 @ 0000 A3d 0m
04 Jan 2025 @ 0000 A2d 0m
02 Jan 2025 @ 0000 A2d 0m
31 Dec 2024 @ 0000 A5d 18h 0m
25 Dec 2024 @ 0600 A65d 14h 3m
20 Oct 2024 @ 1657 ie5d 1h 14m
15 Oct 2024 @ 1543 ie5d 15h 43m
10 Oct 2024 @ 0000 A4d 13h 16m
05 Oct 2024 @ 1044 ie>4h 24m 3d 20h 37m
01 Oct 2024 @ 1407 ie>4h 8m 4d 14h 7m
27 Sep 2024 @ 0000 A5d 0m
22 Sep 2024 @ 0000 A5d 0m
17 Sep 2024 @ 0000 A5d 3h 45m
11 Sep 2024 @ 2015 ie4d 20h 52m
06 Sep 2024 @ 2323 ie5d 5h 54m
01 Sep 2024 @ 1729 ie>4h 45m 5d 8h 53m
27 Aug 2024 @ 083610d 6h 36m
17 Aug 2024 @ 0200 ie4d 19h 9m
12 Aug 2024 @ 0651 ie3d 6h 51m
09 Aug 2024 @ 0000 A2d 1h 2m
06 Aug 2024 @ 2258 ie6d 4h 21m
31 Jul 2024 @ 1837 ie5d 18h 37m
26 Jul 2024 @ 0000 A5d 12h 36m
20 Jul 2024 @ 1124 ie6d 5h 24m
14 Jul 2024 @ 0600 ie3d 6h 0m
11 Jul 2024 @ 0000 A3d 13h 18m
07 Jul 2024 @ 1042 ie1d 13h 24m
05 Jul 2024 @ 21181d 8h 21m
04 Jul 2024 @ 12571d 7h 4m
03 Jul 2024 @ 0553 ie1d 14h 16m
01 Jul 2024 @ 15371d 6h 0m
30 Jun 2024 @ 0937 ie1d 9h 37m
29 Jun 2024 @ 0000 A1d 7h 50m
27 Jun 2024 @ 16102h 41m 1d 4h 26m
26 Jun 2024 @ 1144 ie1d 5h 54m
25 Jun 2024 @ 0550 ie1d 9h 0m
23 Jun 2024 @ 20501d 8h 20m
22 Jun 2024 @ 1230 ie1d 6h 40m
21 Jun 2024 @ 0550 ie23h 10m
20 Jun 2024 @ 06401d 6h 40m
19 Jun 2024 @ 0000 A2d 17h 45m
16 Jun 2024 @ 0615 ie1d 6h 15m
15 Jun 2024 @ 0000 A1d 14h 35m
13 Jun 2024 @ 09252h 56m 2d 16m
11 Jun 2024 @ 09092h 53m 2d 6h 4m
09 Jun 2024 @ 0305 ie1d 18h 50m
07 Jun 2024 @ 08152h 42m 1d 11h 8m
05 Jun 2024 @ 21071d 21h 7m
04 Jun 2024 @ 0000 A2d 3h 30m
01 Jun 2024 @ 2030 ie3d 13h 20m
29 May 2024 @ 0710 ie3d 20h 56m
25 May 2024 @ 1014 ie95d 17h 56m
19 Feb 2024 @ 1518 ie2h 7m
19 Feb 2024 @ 1311 ie10d 3h 14m

Interval Statistics

Interval Count100
Min2h 7m
Max100d 5h 56m
Mean5d 12h 19m
Median2d 4h 47m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
40597 25 Jul 2025 @ 1114 --- Tara near end within a minute or two
40425 15 Jul 2025 @ 1640 --- Ben VL Has erupted since the previous grand.
40417 15 Jul 2025 @ 1036 --- Polly Semi heavy steam (from bike path)
40402 14 Jul 2025 @ 1457 --- Ben VL Off in the last 10 mins
40355 13 Jul 2025 @ 1325 --- rbwhitaker off at 1325
40043 23 Jun 2025 @ 1828 --- B**2 End of eruption
39805 11 Jun 2025 @ 1655 --- Kyle still.ie
39781 10 Jun 2025 @ 0733 --- hkoenig Erupted overnight.
39778 09 Jun 2025 @ 1946 --- Brian was gently steaming upon my arrival at Grand. runoff channel dry.
39728 08 Jun 2025 @ 1435 --- hkoenig Eruption has ended
39606 01 Jun 2025 @ 0622 --- SteveO End near 0622.
39515 30 May 2025 @ 0652 30 May 2025 @ 0705 SteveO Quit between 0652 & 0705.
39267 22 May 2025 @ 1833 --- Suzanne End of eruption
38986 11 May 2025 @ 1507 --- Graham Steaming heavily
38343 01 Mar 2025 @ 0917 --- K.Cooper No eruption in the past week
38187 10 Jan 2025 @ 1245 --- Graham No Rift yet
38116 29 Dec 2024 @ 0930 --- K.Cooper No overnight eruption
38062 21 Dec 2024 @ 1129 --- mhreed Steaming in a threatening manner >:(
38050 21 Dec 2024 @ 0715 --- mhreed Possible Rift overnight. Bits of snow gone in runoff channel but crater doesn’t look particularly wet
37417 05 Oct 2024 @ 1623 --- Graham Forced steam.
37415 05 Oct 2024 @ 1508 --- Graham Ending now.
37320 01 Oct 2024 @ 1815 --- Ben VL Quit at this time
36918 11 Sep 2024 @ 1900 --- JarnoO (wc) Probably ie based on constant, dense steam from roughly its spot since 1748. Steam also suggests a V&T restart prior to that (lasting until a few minutes before 1748), with Turban late 1656 and Vent 1704. Did not see steam from West Triplet prior to the inferred Rift steam.
36684 01 Sep 2024 @ 2221 --- Ben VL Eruption ended within the last couple mins. Duration likely a bit over 5h.
36570 27 Aug 2024 @ 1436 --- music_geek Rift off
36569 27 Aug 2024 @ 1326 --- Kitt B still in eruption at 1326
36378 12 Aug 2024 @ 0840 --- JimS Quiet, ended near end of Grand
36307 06 Aug 2024 @ 2354 06 Aug 2024 @ 2359 ghost842 Rift off
36204 01 Aug 2024 @ 0936 --- mhreed Gently steaming >:(
35998 20 Jul 2024 @ 1455 --- mhreed Heavy steam after D5 Turban.
35764 07 Jul 2024 @ 1315 --- JimS Ended
35696 03 Jul 2024 @ 0814 --- JimS Quiet. Ended within last few minutes.
35573 26 Jun 2024 @ 1320 --- JimS Quiet
35543 25 Jun 2024 @ 0619 --- JimS Ended at 0619
35397 21 Jun 2024 @ 0726 --- JimS Ended at 0726
35369 20 Jun 2024 @ 0933 --- Forestbewithyou Rift is off now. Not sure when it ended
35304 18 Jun 2024 @ 1153 --- K.Cooper Intermittent steam from rift - likely went overnight
35171 13 Jun 2024 @ 1221 --- SantaFe108 End of eruption.
34747 29 May 2024 @ 0906 --- Stephen_Gemar Still ie at 09:06.
33776 12 Jan 2024 @ 1246 --- Graham Steaming
33778 12 Jan 2024 @ 1140 --- Graham End time.
29527 05 Nov 2023 @ 1449 --- Delta4Heavy85 (Wc) Steamy with reflective runoff channels, likely started erupting
28941 21 Oct 2023 @ 1036 --- User34 Steaming
28870 19 Oct 2023 @ 0925 --- OFVEC no evidence of an eruption in the overnight
28667 07 Oct 2023 @ 1206 --- Mikemcc Rift is off
28001 04 Sep 2023 @ 1458 --- Graham Huffing steam.
28000 04 Sep 2023 @ 1238 --- Graham End time.
27628 15 Aug 2023 @ 2046 --- Suzanne eruption ended
27477 09 Aug 2023 @ 1626 --- Suzanne eruption ended
27382 02 Aug 2023 @ 0714 --- JimS Ended
27358 31 Jul 2023 @ 1739 --- Brian ended at 1739, ~D=2h48m
27140 21 Jul 2023 @ 0744 --- JimS Ended
27123 19 Jul 2023 @ 1245 --- JimS Ended
26850 05 Jul 2023 @ 0552 --- JimS No eruption overnight
26793 02 Jul 2023 @ 1742 --- Graham Quit now.
26760 01 Jul 2023 @ 0632 --- JimS Eruption ended
26680 26 Jun 2023 @ 0801 --- Graham Quit during Grand.
26584 22 Jun 2023 @ 0602 --- JimS Ended
26493 20 Jun 2023 @ 1044 --- Graham Quit now.
26304 14 Jun 2023 @ 1633 --- Graham Quit between 1555 and now.
26242 11 Jun 2023 @ 1408 --- JimS Ended
26099 06 Jun 2023 @ 2111 --- SantaFe108 End of eruption.
26041 05 Jun 2023 @ 0637 --- JimS Appears to have erupted overnight
25995 04 Jun 2023 @ 0553 --- JimS Did not erupt overnight
25954 02 Jun 2023 @ 0616 --- JimS Clearly erupted overnight
25712 22 May 2023 @ 2050 --- Graham Now steaming heavily.
25710 22 May 2023 @ 2010 --- SantaFe108 End of eruption.
24859 09 Jan 2023 @ 0000 --- Graham Runoff channels are still snow-covered throughout the day, so no eruption. The Bulgers Hole eruptions were not preceded by Rift.
24803 27 Dec 2022 @ 1336 --- mhvogel Runoff channel is wet with no snow.
24363 14 Oct 2022 @ 1100 --- Tara erupted sometime recently, channel wet
23996 22 Sep 2022 @ 1103 --- Graham Steamy.
23995 22 Sep 2022 @ 0940 --- Graham End time.
23864 16 Sep 2022 @ 1428 --- Graham Steam phase.
23861 16 Sep 2022 @ 1333 --- Graham Steam phase.
23857 16 Sep 2022 @ 1234 --- Graham End time
23731 11 Sep 2022 @ 0820 --- Graham Heavy steam d=5m
23580 05 Sep 2022 @ 1215 --- Graham Ending 1215.
23440 27 Aug 2022 @ 1828 --- User34 Ending
23347 22 Aug 2022 @ 1207 --- JimS Ended
23211 16 Aug 2022 @ 0710 --- JimS Ended during Grand eruption.
22960 01 Aug 2022 @ 0633 --- JimS Ended
22916 28 Jul 2022 @ 1102 --- JimS Ended 1102
22874 27 Jul 2022 @ 0812 --- JimS Quiet
22873 27 Jul 2022 @ 0748 --- JimS erupting
22826 24 Jul 2022 @ 0822 --- JimS Ended at 0822.
22778 22 Jul 2022 @ 1438 --- hkoenig {End}
22638 17 Jul 2022 @ 0816 --- JimS Ended 0816.
22635 17 Jul 2022 @ 0618 --- JimS Still ie
22591 15 Jul 2022 @ 1235 --- JimS Ended at 1235.
22588 15 Jul 2022 @ 1111 --- hkoenig {Still Erupting}
22426 09 Jul 2022 @ 1159 --- hkoenig {End} from MBSchwarz
22373 07 Jul 2022 @ 0535 --- JimS Runoff channel still wet.
22258 01 Jul 2022 @ 1136 --- K.Cooper ended at 1135
22257 01 Jul 2022 @ 0905 --- JimS Still ie at this time
22193 29 Jun 2022 @ 0641 --- JimS Apparently erupted sometime overnight
21882 10 Jun 2022 @ 0741 --- underarockphoto Suspicious steam visible from webcam. May be worth checking out. Still there at 0758.
21843 08 Jun 2022 @ 1843 08 Jun 2022 @ 1853 SantaFe108 Wafting steam at this time. Steam output increased around 1848. Steam decreased significantly by 1853.
21841 08 Jun 2022 @ 1745 08 Jun 2022 @ 1753 SantaFe108 Began steaming with forced steam in one vent at around 1745. Barely steaming at all at 1750, and no steam by 1753.
21837 08 Jun 2022 @ 1637 --- SantaFe108 Rift became hot and started steaming during Bulger's major eruption at 1637
21836 08 Jun 2022 @ 1558 --- SantaFe108 Became very hot and steamy before Bulger erupted, calmed down during the eruption.
EntrySourceLinkComment
16 Aug 2015 @ 1320 JSJ https://www.youtube.com/watch?v=WQOp8gCsW4s#t=0m47s Clips 4-16 of this video compilation (time stamp 0:47 to the end) show Rift Geyser's 1:20 to 3:23 PM eruption on 16 August 2015.
06 Jul 2015 @ 1424 JSJ https://www.youtube.com/watch?v=WQOp8gCsW4s Clips 1-3 of this video compilation (= beginning to time stamp 0:46) show Rift Geyser's 2:24 PM-onward eruption on 6 July 2015.
23 Dec 2019 @ 0750 ltgangi https://youtu.be/hjKosTU27Ak possible rift eruption
11 Aug 2016 @ 1515 JSJ https://www.flickr.com/photos/jsjgeology/29870239943 Thermal photo (1 of 3) of Rift Geyser's mid-afternoon eruption on 11 August 2016.
11 Aug 2016 @ 1515 JSJ https://www.flickr.com/photos/jsjgeology/30385776012 Photo (1 of 5) of Rift Geyser's mid-afternoon eruption on 11 August 2016.
16 Aug 2015 @ 1320 JSJ https://www.flickr.com/photos/jsjgeology/21754568361 Photo (1 of 4) of Rift Geyser's 1:20 to 3:23 PM eruption on 16 August 2015.
06 Jul 2015 @ 1424 JSJ https://www.flickr.com/photos/jsjgeology/19364570833 Photo (1 of 6) of Rift Geyser's mid-afternoon eruption on 6 July 2015.
16 Aug 2014 @ 1141 JSJ https://www.flickr.com/photos/jsjgeology/15332482189 Photo (1 of 2) of Rift Geyser's 11:41 AM to 12:22 PM eruption on 16 August 2014.
08 Jul 2014 @ 1913 JSJ https://www.flickr.com/photos/jsjgeology/15097741689 Photo (1 of 2) of Rift Geyser's early evening eruption on 8 July 2014.
06 Jun 2014 @ 1144 JSJ https://www.flickr.com/photos/jsjgeology/14926633540 Photo (1 of 4) of Rift Geyser's 11:44 to 11:49 AM eruption on 6 June 2014.
31 May 2013 @ 1135 JSJ https://www.flickr.com/photos/jsjgeology/13848055283 Photo (1 of many, plus video clips) of Rift Geyser's late morning eruption on 31 May 2013.
01 Jul 2009 @ 1112 Micah Kipple https://www.flickr.com/photos/fback2008/16196213887 Flickr
Baseline does not exist.