Last Known Eruption
7h 38m ago

Latest Eruptions

Eruption DurationInterval
07 Feb 2025 @ 0006 wc16h 1m
06 Feb 2025 @ 0805 wc1h 22m
06 Feb 2025 @ 0643 wc1h 8m
06 Feb 2025 @ 0535 wc1h 25m
06 Feb 2025 @ 0410 wc ini10h 13m
05 Feb 2025 @ 1757 wc35m
05 Feb 2025 @ 1722 wc min1h 5m
05 Feb 2025 @ 161732m
05 Feb 2025 @ 1545 wc min1h 17m
05 Feb 2025 @ 1428 wc ini>6m 13h 0m
05 Feb 2025 @ 0128 wc1h 12m
05 Feb 2025 @ 0016 wc1h 31m
04 Feb 2025 @ 2245 wc1h 22m
04 Feb 2025 @ 2123 wc ini8h 20m
04 Feb 2025 @ 1303 wc1h 22m
04 Feb 2025 @ 1141 ie wc8h 31m
04 Feb 2025 @ 0310 ie wc ini11h 30m
03 Feb 2025 @ 1540 wc1h 7m
03 Feb 2025 @ 1433 ie2h 27m
03 Feb 2025 @ 1206 ns ini13h 3m
02 Feb 2025 @ 2303 wc1h 8m
02 Feb 2025 @ 2155 wc1h 6m
02 Feb 2025 @ 2049 wc1h 6m
02 Feb 2025 @ 1943 wc2h 4m
02 Feb 2025 @ 1739 wc ini13h 26m
02 Feb 2025 @ 0413 wc ini5h 55m
01 Feb 2025 @ 2218 wc1h 14m
01 Feb 2025 @ 2104 wc1h 15m
01 Feb 2025 @ 1949 wc ini9h 14m
01 Feb 2025 @ 1035 ns wc1h 28m
01 Feb 2025 @ 0907 wc ini14h 55m
31 Jan 2025 @ 1812 ie wc9h 6m
31 Jan 2025 @ 0906 wc15h 7m
30 Jan 2025 @ 1759 wc1h 17m
30 Jan 2025 @ 1642 ns ini1d 2h 21m
29 Jan 2025 @ 1421 ie wc ini1d 1h 37m
28 Jan 2025 @ 1244 ns wc1h 23m
28 Jan 2025 @ 1121 wc ini18h 21m
27 Jan 2025 @ 1700 wc1h 23m
27 Jan 2025 @ 1537 wc ini8h 11m
27 Jan 2025 @ 0726 ie wc3h 31m
27 Jan 2025 @ 0355 wc ini8h 35m
26 Jan 2025 @ 1920 wc ini9h 34m
26 Jan 2025 @ 0946 wc1h 17m
26 Jan 2025 @ 0829 ie wc11h 28m
25 Jan 2025 @ 2101 ie wc12h 18m
25 Jan 2025 @ 0843 ie wc1d 24m
24 Jan 2025 @ 0819 wc min1h 17m
24 Jan 2025 @ 0702 wc1h 13m
24 Jan 2025 @ 0549 wc1h 6m
24 Jan 2025 @ 0443 wc1h 3m
24 Jan 2025 @ 0340 wc1h 13m
24 Jan 2025 @ 0227 wc1h 20m
24 Jan 2025 @ 0107 wc ini13h 9m
23 Jan 2025 @ 1158 ns wc1h 21m
23 Jan 2025 @ 1037 wc1h 12m
23 Jan 2025 @ 0925 wc1h 18m
23 Jan 2025 @ 0807 wc ini8h 50m
22 Jan 2025 @ 2317 wc1h 16m
22 Jan 2025 @ 2201 wc1h 16m
22 Jan 2025 @ 2045 wc1h 25m
22 Jan 2025 @ 1920 wc ini8h 22m
22 Jan 2025 @ 10581h 36m
22 Jan 2025 @ 0922 wc ini6h 20m
22 Jan 2025 @ 0302 wc1h 36m
22 Jan 2025 @ 0126 wc9h 1m
21 Jan 2025 @ 1625 wc1h 31m
21 Jan 2025 @ 1454 ie ini7h 58m
21 Jan 2025 @ 0656 wc1h 22m
21 Jan 2025 @ 0534 wc ini12h 34m
20 Jan 2025 @ 1700 ns1h 4m
20 Jan 2025 @ 15561h 17m
20 Jan 2025 @ 1439 wc1h 29m
20 Jan 2025 @ 1310 ns wc ini16h 19m
19 Jan 2025 @ 2051 wc1h 18m
19 Jan 2025 @ 1933 wc ini7h 49m
19 Jan 2025 @ 1144 ie wc1h 34m
19 Jan 2025 @ 1010 ie wc2h 3m
19 Jan 2025 @ 0807 ns wc1h 58m
19 Jan 2025 @ 0609 wc1h 20m
19 Jan 2025 @ 0449 wc ini8h 37m
18 Jan 2025 @ 2012 wc1h 42m
18 Jan 2025 @ 1830 wc ini1d 11h 49m
17 Jan 2025 @ 0641 wc1h 7m
17 Jan 2025 @ 0534 wc1h 24m
17 Jan 2025 @ 0410 wc ini7h 28m
16 Jan 2025 @ 2042 wc min48m
16 Jan 2025 @ 1954 wc52m
16 Jan 2025 @ 1902 wc1h 8m
16 Jan 2025 @ 1754 wc1h 4m
16 Jan 2025 @ 16501h 24m
16 Jan 2025 @ 1526 wc ini12h 18m
16 Jan 2025 @ 0308 wc7h 22m
15 Jan 2025 @ 1946 wc10h 38m
15 Jan 2025 @ 0908 wc ini10h 43m
14 Jan 2025 @ 2225 wc1h 30m
14 Jan 2025 @ 2055 wc ini12h 55m
14 Jan 2025 @ 0800 wc1h 27m
14 Jan 2025 @ 0633 wc ini7h 41m
13 Jan 2025 @ 2252 wc1h 13m

Interval Statistics

Interval Count100
Min32m
Max1d 11h 49m
Mean5h 47m
Median1h 31m
Initial-to-Initial
Interval Count29
Min8h 24m
Max2d 18h 13m
Mean18h 57m
Median15h 4m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
38129 02 Jan 2025 @ 0652 --- Joe   many roars between 0500 and 0630
38052 21 Dec 2024 @ 0430 --- K.Cooper terminal roars
37965 03 Dec 2024 @ 1434 --- Delta4Heavy85 (Wc) Roaring, in series
37939 15 Nov 2024 @ 1709 --- JarnoO (wc) Just post-initial
37637 19 Oct 2024 @ 1445 --- JarnoO (wc) just post-eruptive
37618 17 Oct 2024 @ 1658 --- o.geyser Roar of lion.
37617 17 Oct 2024 @ 1657 --- o.geyser Initial gurgling.
37435 07 Oct 2024 @ 1651 --- Betty Lion was done at 1600. no idea if it was initial
37325 02 Oct 2024 @ 0825 --- Graham Terminal roars
37185 27 Sep 2024 @ 0839 --- Delta4Heavy85 Roar from lion, in series
37295 24 Sep 2024 @ 1858 24 Sep 2024 @ 1901 Siegmund Roars 1858 and 1901. No subsequent eruption seen.
37068 19 Sep 2024 @ 1439 --- CP Huff with a few splashes.
37067 19 Sep 2024 @ 1433 --- CP Huff with a few splashes.
36455 18 Aug 2024 @ 1725 --- minissa This is the approximate time of the initial
36221 02 Aug 2024 @ 0755 --- bhoppe end of series roars
35881 12 Jul 2024 @ 1657 12 Jul 2024 @ 1726 Tara series of terminal roars
35503 24 Jun 2024 @ 0625 --- K.Cooper weak roar
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.
EntrySourceLinkComment
08 Jun 2024 @ 1333 JSJ https://www.flickr.com/photos/jsjgeology/53816865835 Photo of Lion Geyser's 1:33 to 1:36 PM eruption on 8 June 2024.
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.
BaselineDistance (ft)Description
South side 100North edge of the walk near Heart Spring
North side 100North edge of the walk near North Goggles Geyser