Last Known Eruption
1h 11m ago

Latest Eruptions

Eruption DurationInterval
17 Jun 2024 @ 1739 wc1h 23m
17 Jun 2024 @ 1616 ini17h 34m
16 Jun 2024 @ 2242 wc1h 16m
16 Jun 2024 @ 2126 ie9h 6m
16 Jun 2024 @ 12201h 19m
16 Jun 2024 @ 1101 ie wc1h 45m
16 Jun 2024 @ 09161h 24m
16 Jun 2024 @ 0752 ini13h 20m
15 Jun 2024 @ 1832 wc ini11h 19m
15 Jun 2024 @ 0713 ns wc1h 30m
15 Jun 2024 @ 0543 ini8h 13m
14 Jun 2024 @ 2130 wc4h 36m
14 Jun 2024 @ 1654 wc min21s 2h 38m
14 Jun 2024 @ 1416 ie wc ini6h 44m
14 Jun 2024 @ 07321h 37m
14 Jun 2024 @ 0555 wc ini7h 31m
13 Jun 2024 @ 2224 wc2h 24m
13 Jun 2024 @ 20001h 17m
13 Jun 2024 @ 18431h 21m
13 Jun 2024 @ 1722 ini6m 46s 15h 47m
13 Jun 2024 @ 0135 min1h 12m
13 Jun 2024 @ 00231h 9m
12 Jun 2024 @ 23141h 12m
12 Jun 2024 @ 2202 wc1h 20m
12 Jun 2024 @ 2042 wc ini10h 9m
12 Jun 2024 @ 1033 ie1h 27m
12 Jun 2024 @ 09061h 14m
12 Jun 2024 @ 07521h 15m
12 Jun 2024 @ 06371h 31m
12 Jun 2024 @ 0506 wc ini10h 15m
11 Jun 2024 @ 1851 ie ini11h 6m
11 Jun 2024 @ 0745 min34m
11 Jun 2024 @ 0711 min15m
11 Jun 2024 @ 0656 wc min1h 15m
11 Jun 2024 @ 0541 wc1h 10m
11 Jun 2024 @ 0431 wc15h 34m
10 Jun 2024 @ 12571h 19m
10 Jun 2024 @ 1138 wc ini7m 3s 6h 19m
10 Jun 2024 @ 0519 wc min1h 16m
10 Jun 2024 @ 0403 wc10h 28m
09 Jun 2024 @ 1735 min1h 20m
09 Jun 2024 @ 161515m
09 Jun 2024 @ 1600 min1h 21m
09 Jun 2024 @ 14391h 27m
09 Jun 2024 @ 1312 ie8h 2m
09 Jun 2024 @ 051013h 20m
08 Jun 2024 @ 15501h 8m
08 Jun 2024 @ 14421h 9m
08 Jun 2024 @ 1333 ie>3m 49m
08 Jun 2024 @ 1244 wc min1m 42s 1h 0m
08 Jun 2024 @ 11441h 25m
08 Jun 2024 @ 1019 ini11h 35m
07 Jun 2024 @ 2244 ie1h 28m
07 Jun 2024 @ 21161h 31m
07 Jun 2024 @ 1945 ns wc9h 29m
07 Jun 2024 @ 10161h 24m
07 Jun 2024 @ 0852 ini10h 56m
06 Jun 2024 @ 2156 wc ini11h 21m
06 Jun 2024 @ 10351h 24m
06 Jun 2024 @ 09111h 31m
06 Jun 2024 @ 0740 A21h 25m
05 Jun 2024 @ 10153m 21s 1h 26m
05 Jun 2024 @ 084915h 56m
04 Jun 2024 @ 1653 min1h 29m
04 Jun 2024 @ 15241h 14m
04 Jun 2024 @ 14101h 31m
04 Jun 2024 @ 1239 ini1d 3h 42m
03 Jun 2024 @ 0857 wc1h 22m
03 Jun 2024 @ 0735 wc ini≥7m05s11h 14m
02 Jun 2024 @ 20211h 20m
02 Jun 2024 @ 1901 ini7m 13h 22m
02 Jun 2024 @ 0539 wc31m
02 Jun 2024 @ 0508 wc min9h 8m
01 Jun 2024 @ 2000 wc1h 22m
01 Jun 2024 @ 1838 ie ini8h 7m
01 Jun 2024 @ 10311h 26m
01 Jun 2024 @ 09055h 45m
01 Jun 2024 @ 0320 wc1h 28m
01 Jun 2024 @ 0152 wc ini7h 12m
31 May 2024 @ 18401h 16m
31 May 2024 @ 1724 wc ini6m 36s 7h 39m
31 May 2024 @ 09451h 1m
31 May 2024 @ 084429m
31 May 2024 @ 0815 wc min9s 1h 22m
31 May 2024 @ 06531h 17m
31 May 2024 @ 0536 wc ini14h 38m
30 May 2024 @ 14581h 3m
30 May 2024 @ 1355 wc4h 1m
30 May 2024 @ 0954 wc1h 33m
30 May 2024 @ 0821 ini10h 36m
29 May 2024 @ 2145 wc ini12h 48m
29 May 2024 @ 08571h 23m
29 May 2024 @ 0734 ini10h 3m
28 May 2024 @ 2131 wc1h 14m
28 May 2024 @ 2017 ini9h 52m
28 May 2024 @ 10251h 21m
28 May 2024 @ 0904 ini4h 21m
28 May 2024 @ 0443 wc13h 3m
27 May 2024 @ 15401h 32m
27 May 2024 @ 1408 ie7h 24m

Interval Statistics

Interval Count100
Min15m
Max1d 3h 42m
Mean5h 8m
Median1h 30m
Initial-to-Initial
Interval Count25
Min8h 21m
Max2d 9h 17m
Mean19h 29m
Median14h 11m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
35239 16 Jun 2024 @ 0534 --- K.Cooper between series: splashing and drinking fountain ie
35207 14 Jun 2024 @ 1550 --- JarnoO (wc) Lack of roars after the Old Faithful wait suggests it had an eruption during this time. Assuming this is the case and that this was a normal in-series eruption, next one 1641±10m, using a 1h20m interval from 1416ie ini to 1536 assumed and a 1h05m interval from 1536 assumed to the next one.
35202 14 Jun 2024 @ 0913 --- Forestbewithyou Roars are very weak… likely end of series
35058 10 Jun 2024 @ 1521 --- K.Cooper terminal roaring
34877 04 Jun 2024 @ 0629 --- K.Cooper Light splashing - between series
34363 27 Apr 2024 @ 1407 --- DanS Very wet roar
34100 07 Mar 2024 @ 1759 --- JarnoO (wc) Terminal roars; end of series
34074 27 Feb 2024 @ 1440 27 Feb 2024 @ 1507 BigSkyKatie If series continued, we would have missed eruption via webcam as OF was in window and blowing snow would prevent us from discerning a plume on static cam. So continuation of long series is unknown.
33893 20 Jan 2024 @ 0800 --- K.Cooper somewhere between series
33804 16 Jan 2024 @ 0738 --- K.Cooper between series
33783 14 Jan 2024 @ 1314 --- K.Cooper Done.
33749 06 Jan 2024 @ 0802 --- Graham Roars 0802 0804 0813
33735 02 Jan 2024 @ 1650 --- Delta4Heavy85 (Wc) 16s of thin water from Lion, didn't put out enough water for me to count it as a minor.
33302 21 Dec 2023 @ 1440 21 Dec 2023 @ 1500 aferrara Several roars with no eription
29323 01 Nov 2023 @ 1107 01 Nov 2023 @ 1117 Delta4Heavy85 (Wc) BIG roar lasting ~30s at 1107, smaller roars after that. Appears to be in terminal roars
28833 17 Oct 2023 @ 1241 17 Oct 2023 @ 1250 Delta4Heavy85 (Wc) Appears to be in terminal roars
28742 12 Oct 2023 @ 1531 --- JarnoO (wc) just post-eruptive; seems to have been last in series as well
28705 08 Oct 2023 @ 1115 08 Oct 2023 @ 1136 Tara terminal roars, series over
28623 04 Oct 2023 @ 1730 --- Ben VL Terminal roars
28608 03 Oct 2023 @ 0814 03 Oct 2023 @ 0826 Delta4Heavy85 (Wc) Terminal Roars
28485 26 Sep 2023 @ 1609 --- JarnoO (wc) Sustained low jetting for 15s, with sporadic splashes after that. It should've started a series, but failed somehow. Wondering if this introduced a delay of two hours, as it did begin a series at 1818.
28315 18 Sep 2023 @ 0647 --- Graham Splashing
28258 15 Sep 2023 @ 0659 --- K.Cooper VR of no eruption or splashing in the last hour. Seems in between series to me.
28249 14 Sep 2023 @ 0600 --- K.Cooper terminal roars
28180 10 Sep 2023 @ 0822 --- SantaFe108 Terminal roars, end of series.
28162 10 Sep 2023 @ 0608 --- K.Cooper roaring
28147 09 Sep 2023 @ 1034 --- Graham Last in series.
28127 09 Sep 2023 @ 0627 --- K.Cooper roar but not enthusiastic
28045 05 Sep 2023 @ 2125 --- Ben VL End of series
27741 23 Aug 2023 @ 1846 --- Dan A Terminal roars, end of series
27701 20 Aug 2023 @ 1150 --- Dan A Terminal roars, end of series
27697 20 Aug 2023 @ 0720 --- JarnoO (wc) Post-eruptive steaming. Would have been from the initial - no eruption seen since it became light enough for the camera. OFVEC had entered 0711 E ini earlier today (now removed), which is a credible time given what I observed from webcam.
27694 19 Aug 2023 @ 2147 --- Ryan B Terminal roars. Series has likely ended.
27677 19 Aug 2023 @ 0100 --- Ben VL Maybe one minor, but no additional eruptions seen by this time. Thinking series is over.
27665 18 Aug 2023 @ 0754 --- Dan A Terminal roars, end of series
27645 16 Aug 2023 @ 1748 --- Dan A Terminal roars, end of series
27575 13 Aug 2023 @ 2040 --- Dan A Terminal roars, series is over
27532 11 Aug 2023 @ 1921 --- Dan A Terminal roars, end of series
27524 11 Aug 2023 @ 1547 --- minissa Roar!
27271 27 Jul 2023 @ 1655 27 Jul 2023 @ 1900 SantaFe108 No activity since last Lion, end of series.
26984 10 Jul 2023 @ 1940 10 Jul 2023 @ 1950 deanl did several huffs but no eruption - the series must have ended at 6
26895 07 Jul 2023 @ 2220 --- Ben VL Series seems to be over.
26809 03 Jul 2023 @ 1717 --- Kyle roars, probably terminal, end of series
26783 02 Jul 2023 @ 0759 --- Graham Weak splashing, not in series.
26770 01 Jul 2023 @ 0900 --- karenh Terminal roars ~9:00
26751 30 Jun 2023 @ 1900 --- Graham Terminal roars. Likely 2 eruptions were missed by gazers waiting for Grand.
26741 30 Jun 2023 @ 0745 --- Graham Light splashes, not in series.
26717 28 Jun 2023 @ 1315 --- Graham 5th roar. Series probably over.
26707 28 Jun 2023 @ 0717 --- Graham Splashing, not in series.
26695 27 Jun 2023 @ 0723 --- Graham Splashing, not in series.
26678 26 Jun 2023 @ 0629 --- Graham Terminal roars.
26662 25 Jun 2023 @ 1309 --- Graham Series likely over, 5th roar.
26635 24 Jun 2023 @ 1016 --- Graham Looks like series is over.
26588 22 Jun 2023 @ 0856 --- Forestbewithyou Lion is likely done with its series
26559 21 Jun 2023 @ 1211 --- Forestbewithyou Lion likely done with series. Multiple roars with no eruption.
26457 19 Jun 2023 @ 0939 --- Polly Lion series appears to have ended. (Occasional heavy steam)
26411 17 Jun 2023 @ 1932 --- Graham 4th roar, series likely over.
26394 17 Jun 2023 @ 0810 --- Graham Light splashes
26344 15 Jun 2023 @ 1715 --- BobInNV New logger
26322 14 Jun 2023 @ 2010 --- Graham Splashy
26285 13 Jun 2023 @ 1030 --- Graham At least 10 roars with no eruption. Series of 1. NG is having an extended fill anyway.
26220 10 Jun 2023 @ 1800 --- User34 Weak roar, again at 1807
26179 09 Jun 2023 @ 0610 --- Graham Week terminal roars. Series ended overnight.
26142 08 Jun 2023 @ 0612 --- Graham Lightly splashing, in recovery from yesterday's series. NG cycling normally, no boiling.
26109 07 Jun 2023 @ 0535 --- K.Cooper heavily splashing and drinking fountain is on. don't think we've had an initial yet
25974 03 Jun 2023 @ 1142 --- Janet Jones Sustained splash a couple feet above the cone
25793 26 May 2023 @ 0624 --- Graham Splashing, no eruption recently.
25772 25 May 2023 @ 0513 --- JarnoO No signs of a series overnight
25703 22 May 2023 @ 1700 --- Graham 2 roars and some weak steam puffs from Lion. It's likely at the end of the series. I'm heading in for a break.
25683 21 May 2023 @ 2100 21 May 2023 @ 2245 SantaFe108 2100 No initial yet, Kitten in-series, NG has had one short extended fill. 2128 Biggest surge of the interval, suddenly became alot more lively. 2145 Has calmed down since the surge. 2200 No initial yet. No good surges since last one. 2245 Abandoning Lion due to death of flashlight. No initial yet. Go Kitten! Left a red Motorola radio by Lion bench. If anyone finds it tomorrow morning let me know!
25634 21 May 2023 @ 0642 --- Graham Splashy, not in series.
25629 20 May 2023 @ 2130 --- SantaFe108 First splashing observed since previous end of series.
25602 20 May 2023 @ 1800 20 May 2023 @ 1818 SantaFe108 Four weak, dry roars in a row. End of series.
25578 20 May 2023 @ 1033 --- BobInSLC 5 second minor?
25490 17 May 2023 @ 0620 --- Graham Weak terminal roars.
25311 01 May 2023 @ 1805 --- JarnoO (wc) initial post-eruptive
25249 26 Apr 2023 @ 1130 --- DanS Roar Also 1122
25144 10 Apr 2023 @ 0935 --- mhreed Feeble roaring. End of a series.
25125 26 Mar 2023 @ 0943 26 Mar 2023 @ 1017 JarnoO (wc) terminal roars
25083 08 Mar 2023 @ 1808 08 Mar 2023 @ 1915 JarnoO terminal roars?
24836 06 Jan 2023 @ 1736 --- JarnoO just post-eruptive; end of series
24749 05 Dec 2022 @ 0905 05 Dec 2022 @ 0928 Delta4Heavy85 Observed 3 dry roars but no eruption. Seams to be the end of series.
24724 27 Nov 2022 @ 0545 --- Art-P lion was one off. there were puffs from lion 0415-0445 but nothing more.
24717 25 Nov 2022 @ 1720 25 Nov 2022 @ 1725 Delta4Heavy85 Observed three roars on the webcam but no eruption. Seems like the end of the series.
24546 30 Oct 2022 @ 1321 --- SantaFe108 6th dry roar. End of series.
24452 21 Oct 2022 @ 0855 21 Oct 2022 @ 0910 Delta4Heavy85 Four roars but no eruption seems to be a one eruption series.
24178 01 Oct 2022 @ 0838 --- Graham Roared. Probably had an 07xx eruption. Also 0840 weak roar, 0842, 0843, 0845.
24147 28 Sep 2022 @ 1409 28 Sep 2022 @ 1433 SteveO 1409 roar with water, 1415 roar, 1421 roar with water, 1428 weak roar, roar with a spritz of water, 1433 weak roar. End of this Lion series.
24129 26 Sep 2022 @ 1658 26 Sep 2022 @ 1719 SteveO 1658 & 1705 roar with a little water, 1709 light roar, 1716 & 1719 roar with a little water. End of Lion sreies.
24088 25 Sep 2022 @ 0824 --- SteveO Aborted eruption, about 10 seconds on water.
23935 20 Sep 2022 @ 1435 20 Sep 2022 @ 1450 SteveO 1435 roar with a little water, 1439 roar with water, 1441 & 1443 roar with a little water, 1444 & 1446 roar with water, 1450 roar with a little water. Lion has ended this series.
23927 20 Sep 2022 @ 0635 --- Kat Several nice roars ending with large one with approx 20 sec of water.
23915 19 Sep 2022 @ 1158 19 Sep 2022 @ 1214 SteveO 1158 roar no water, 1204 & 1208 roar with a little water, 1211 weak roar, 1214 roar with water.
23895 18 Sep 2022 @ 1151 18 Sep 2022 @ 1217 SteveO 1151, 1201, 1203 & 1204 roar with a little water, 1207 longer roar with more water. 1209 roar with a little water. No further roars. 1217 a little spit of water without a roar.
23862 16 Sep 2022 @ 1401 16 Sep 2022 @ 1417 SteveO Roars at 1401 & 1408 with no water, roar at 1409 & 1410 with a little water. Roar at 1412 & 1413 with no water. Weak roar at 1417.
23764 11 Sep 2022 @ 1620 11 Sep 2022 @ 1640 SantaFe108 Several roars during this time which ultimately amounted to no eruption.
23668 09 Sep 2022 @ 0755 --- Graham This should be the initial as it was splashing 0655.
23574 04 Sep 2022 @ 1905 --- Graham 6th roar with no eruption. Looks like a series of 1 unless it goes really late in the roar series.
22299 03 Jul 2022 @ 0959 --- DaveM Initial - based on duration
22185 28 Jun 2022 @ 1850 --- deanl there was NO second Lion, just twice it huffed and had false starts
EntrySourceLinkComment
19 Sep 2023 @ 1659 JarnoO https://www.youtube.com/watch?v=DuIeJiYwNg0 As captured by the webcam.
01 Mar 2023 @ 1002 Delta4Heavy85 https://adobe.ly/3Y6AUQZ Video of eruption
04 Feb 2020 @ 1052 EricZ https://www.dropbox.com/s/4325w13fudk8h4d/ugbWebcamTime_02042020_105412.mp4?dl=0 Steam cloud @ 1052:30
01 Jan 2020 @ 0231 K.Cooper https://www.youtube.com/watch?v=qBXaTUSQHfU&feature=youtu.be From 0:00 to 1:00
03 Oct 2019 @ 1006 JoeN https://youtu.be/vGhm_8gVqZY Lion video
16 Aug 2015 @ 1110 JSJ https://www.flickr.com/photos/jsjgeology/21658915002 Photo (1 of 6) of Lion Geyser's 11:10 to 11:14 AM eruption on 16 August 2015.
16 Aug 2015 @ 0944 JSJ https://www.flickr.com/photos/jsjgeology/21679511491 Photo (1 of 2) of Lion Geyser's 9:44 AM-onward eruption on 16 August 2015.
15 Aug 2015 @ 1245 JSJ https://www.flickr.com/photos/jsjgeology/21316237110 Photo of Lion Geyser's 12:45 PM-onward eruption on 15 August 2015.
10 Aug 2015 @ 1736 JSJ https://www.flickr.com/photos/jsjgeology/21316396318 Photo of Lion Geyser's 5:36 to 5:41 PM eruption on 10 August 2015.
09 Aug 2015 @ 1422 JSJ https://www.flickr.com/photos/jsjgeology/21477913196 Photo (1 of 5) of Lion Geyser's 2:22 to 2:26 PM eruption on 9 August 2015.
09 Aug 2015 @ 1318 JSJ https://www.flickr.com/photos/jsjgeology/21316186678 Photo (1 of 3) of Lion Geyser's 1:18 to 1:22 PM eruption on 9 August 2015.
09 Aug 2015 @ 1300 JSJ https://www.flickr.com/photos/jsjgeology/20881167754 Photo (1 of 13) of Lion Geyser's 1:00 to 1:01 PM eruption on 9 August 2015.
09 Aug 2015 @ 1142 JSJ https://www.flickr.com/photos/jsjgeology/21512230241 Photo (1 of 8) of Lion Geyser's 11:42 to 11:46 AM eruption on 9 August 2015.
09 Aug 2015 @ 1035 JSJ https://www.flickr.com/photos/jsjgeology/21315549938 Photo (1 of 4) of Lion Geyser's 10:35 to 10:38 AM eruption on 9 August 2015.
03 Jun 2014 @ 1223 JSJ https://www.flickr.com/photos/jsjgeology/15097998831 Photo of Lion Geyser's 12:24 to 12:27 PM eruption on 3 June 2014.
01 Jul 2016 @ 1053 Biddle https://imgur.com/gallery/BzVsLOK/new Beginning of erpution
10 Apr 2016 @ 1450 JSJ https://www.youtube.com/watch?v=VttoHRno1mk Video (via webcam) of Lion Geyser's initial eruption from 2:50 to 2:56 PM on 10 April 2016.
01 Apr 2016 @ 1120 JSJ https://www.flickr.com/photos/jsjgeology/25900442600 Webcam screen capture photo (1 of 3) of Lion Geyser's 11:20 to 11:24 AM eruption on 1 April 2016.
31 Jan 2016 @ 1211 JSJ https://www.flickr.com/photos/jsjgeology/24108596953 Webcam screen capture photo (1 of 3) of the Lion Geyser-Old Faithful Geyser dual eruption from 12:11 to 12:15 PM on 31 January 2016.
24 Dec 2015 @ 1311 JSJ https://www.flickr.com/photos/jsjgeology/23924093756 Webcam screen capture photos (1 or 3) of Lion Geyser's 1:11 to 1:15 PM eruption on 24 December 2015.
BaselineDistance (ft)Description
South side 100North edge of the walk near Heart Spring
North side 100North edge of the walk near North Goggles Geyser