Last Known Eruption
2h 3m ago

Latest Eruptions

Eruption DurationInterval
18 Sep 2021 @ 0803 wc1h 18m
18 Sep 2021 @ 0645 ie wc1h 28m
18 Sep 2021 @ 0517 wc ini7h 55m
17 Sep 2021 @ 2122 wc3m 32s 1h 16m
17 Sep 2021 @ 2006 wc1h 28m
17 Sep 2021 @ 1838 ie6h 51m
17 Sep 2021 @ 11471h 24m
17 Sep 2021 @ 1023 ns wc ini9h 3m
17 Sep 2021 @ 0120 wc1h 24m
16 Sep 2021 @ 2356 wc ini12h 55m
16 Sep 2021 @ 1101 ie1h 17m
16 Sep 2021 @ 0944 ie1h 24m
16 Sep 2021 @ 0820 wc1h 25m
16 Sep 2021 @ 0655 ns ini9h 20m
15 Sep 2021 @ 2134:401h 28m
15 Sep 2021 @ 2006 ie wc ini5h 48m
15 Sep 2021 @ 1418 ns25m
15 Sep 2021 @ 1352:15 wc min29s 1h 13m 35s
15 Sep 2021 @ 1238:40 wc3m 39s 1h 19m
15 Sep 2021 @ 11191h 20m
15 Sep 2021 @ 09591h 27m
15 Sep 2021 @ 0832 wc ini19h 51m
14 Sep 2021 @ 12411h 18m
14 Sep 2021 @ 11231h 14m
14 Sep 2021 @ 1009 ini9h 20m
14 Sep 2021 @ 0049 wc1h 11m
13 Sep 2021 @ 2338 wc37m
13 Sep 2021 @ 2301 wc min1h 1m
13 Sep 2021 @ 2200 wc1h 9m
13 Sep 2021 @ 2050:42 ini10h 46m
13 Sep 2021 @ 10041h 15m
13 Sep 2021 @ 0849 wc1h 20m
13 Sep 2021 @ 0729 ie10h 49m
12 Sep 2021 @ 2040 wc1h 38m
12 Sep 2021 @ 1902 ini7h 0m
12 Sep 2021 @ 1202 wc8h 8m
12 Sep 2021 @ 0354 wc1h 20m
12 Sep 2021 @ 0234 wc ini1d 7h 11m
10 Sep 2021 @ 1923 ini5h 47m
10 Sep 2021 @ 1336 min1h 19m
10 Sep 2021 @ 1217 A1h 36m
10 Sep 2021 @ 1041 ns6h 20m
10 Sep 2021 @ 0421 wc1h 18m
10 Sep 2021 @ 0303 wc ini7h 23m
09 Sep 2021 @ 1940 ie1h 9m
09 Sep 2021 @ 1831 wc1h 31m
09 Sep 2021 @ 1700 wc ini7h 19m
09 Sep 2021 @ 0940:12 wc3m 50s 1h 33m
09 Sep 2021 @ 0807 ini16h 14m
08 Sep 2021 @ 1553 ie wc1h 26m
08 Sep 2021 @ 1427 wc3m 42s 1h 24m
08 Sep 2021 @ 130320h 8m
07 Sep 2021 @ 1655 min1h 21m
07 Sep 2021 @ 15341h 23m
07 Sep 2021 @ 1411 ini7h 23m
07 Sep 2021 @ 0647:29 wc3m 31s 1h 23m
07 Sep 2021 @ 0524 wc ini8h 10m
06 Sep 2021 @ 2114 wc1h 26m
06 Sep 2021 @ 1948 wc ini7h 33m
06 Sep 2021 @ 1215 ini11h 38m
06 Sep 2021 @ 0037 wc1h 27m
05 Sep 2021 @ 2310 wc ini6h 13m
05 Sep 2021 @ 16571h 24m
05 Sep 2021 @ 1533 ini9h 5m
05 Sep 2021 @ 0628 ns1h 21m
05 Sep 2021 @ 0507 wc ini5h 36m
04 Sep 2021 @ 2331 wc1h 26m
04 Sep 2021 @ 2205 wc ini10h 4m
04 Sep 2021 @ 12011h 40m
04 Sep 2021 @ 1021 ini15h 41m
03 Sep 2021 @ 1839:18 wc3m 35s 1h 21m
03 Sep 2021 @ 17181h 29m
03 Sep 2021 @ 1549 ini10h 57m
03 Sep 2021 @ 0452 wc1h 17m
03 Sep 2021 @ 0335 wc1h 29m
03 Sep 2021 @ 0206 wc ini7h 30m
02 Sep 2021 @ 1836 ie wc1h 34m
02 Sep 2021 @ 1702 wc ini8h 52m
02 Sep 2021 @ 08101h 20m
02 Sep 2021 @ 0650 ie1h 19m
02 Sep 2021 @ 0531 wc1h 19m
02 Sep 2021 @ 0412 wc ini11h 9m
01 Sep 2021 @ 1702:581h 22m 19s
01 Sep 2021 @ 1540:39 ini5m 57s 6h 23m 0s
01 Sep 2021 @ 0917:393m 34s 1h 27m
01 Sep 2021 @ 0750 ini~6m 5h 37m
01 Sep 2021 @ 0213 wc1h 22m
01 Sep 2021 @ 0051 wc1h 23m
31 Aug 2021 @ 2328 wc ini8h 26m
31 Aug 2021 @ 1502 ns wc1h 27m
31 Aug 2021 @ 1335 ie17h 4m
30 Aug 2021 @ 2031 wc1h 20m
30 Aug 2021 @ 1910:23 ini6m 23s 10h 38m
30 Aug 2021 @ 08321h 22m
30 Aug 2021 @ 0710 ini8h 55m
29 Aug 2021 @ 2215 wc1h 28m
29 Aug 2021 @ 2047 wc ini9h 39m
29 Aug 2021 @ 1108 wc1h 26m
29 Aug 2021 @ 0942 ini13h 6m
28 Aug 2021 @ 203617m

Interval Statistics

Interval Count100
Min17m
Max1d 7h 11m
Mean4h 55m
Median1h 28m
Initial-to-Initial
Interval Count33
Min7h 2m
Max1d 17h 56m
Mean14h 24m
Median11h 44m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
18447 16 Jul 2021 @ 0853 --- JarnoO (wc) Just post-eruptive
18060 23 Jun 2021 @ 1540 23 Jun 2021 @ 1635 CrisG several nice roars with few splashes seen during this time, but unfortunately no eruption. chased off the hill by impending rain.
17767 14 Jun 2021 @ 0902 --- Kat Lion appears post eruptive when cam moved to hill
16985 05 May 2021 @ 0956 --- JarnoO post-eruptive
16935 27 Apr 2021 @ 1440 --- Micah Kipple Roar with no eruption.
16813 18 Jan 2021 @ 1611 --- Graham Lion was very steamy. Probably post eruptive after the initial.
16784 13 Dec 2020 @ 1510 --- JarnoO Lion-like steam on static. Wind direction not steady, therefore 1510 could also be westernmost edge of Beehive's plume. This would be consistent with (near-)post-eruptive steam seen on 1514 frame. Maybe a dual, since Lion *did* go @ 1344.
16374 09 Oct 2020 @ 0747 --- Kat 0747 Post-eruptive steam noted when cam moved from down basin to the hill.
16202 20 Sep 2020 @ 0757 --- K.Cooper (wc) Lion post-eruptive steaming, most likely initial.
15480 10 Aug 2020 @ 0757 --- JarnoO (wc) Post-eruptive. Possibly initial based on lack of eruption in the hour or so before.
15360 04 Aug 2020 @ 1422 --- JarnoO (wc) Post-eruptive, assuming initial
14835 01 Jul 2020 @ 1820 --- Graham Boardwalk all wet, must have erupted.
14587 10 Jun 2020 @ 1824 --- K.Cooper BW is soaked again, post eruptive, likely went
14576 09 Jun 2020 @ 2018 --- K.Cooper boardwalk is soaked, likely went about thirty minutes ago.
14194 16 May 2020 @ 2120 16 May 2020 @ 2140 MikeG (webcam observation) Roared several times but failed to erupt.
14193 16 May 2020 @ 2010 --- Graham Possible Lion initial around 2210 while the cam was on Old Faithful. Lion steaming gently at 2220.
14183 09 May 2020 @ 1528 --- JarnoO (wc) post-eruptive
14175 21 Apr 2020 @ 0856 --- JarnoO (wc) post-eruptive
14167 09 Apr 2020 @ 1322 --- JarnoO (wc) post-eruptive. Likely the initial
14163 06 Apr 2020 @ 1114 --- JarnoO (wc) Appeared to be post-eruptive
14160 28 Mar 2020 @ 1718 --- Graham Lion had a couple of large splashes, just under what I would call a minor. One and done this series?
14152 18 Mar 2020 @ 1406 --- JarnoO (wc) first observed roar post-1321 eruption
14150 12 Mar 2020 @ 1108 --- JarnoO (wc) Heavy splashing which normally only precedes eruptions. This splashing happened ~3 hours after the last eruption was seen (maybe missed 2 eruptions inbetween the last one and this one if 0817 ie wasn't end of series).
14141 23 Feb 2020 @ 1107 --- Micah Kipple It appears that a piece of formation about the size of a dinner plate broke loose from the decorations near the top of the cone and shattered on the slope. Numerous pieces of geyserite are scattered on the flank of the cone and ilther3 is a new, somewhat noticeable scar on the face. I see no human footprints to indicate vandalism so I suspect it just broke off naturally during an eruption. Perhaps as a result of freeze thaw action.
13536 04 Sep 2019 @ 0835 --- Graham Weak roars, must have had a series that ended this morning.
13516 03 Sep 2019 @ 0933 03 Sep 2019 @ 0940 Micah Kipple Several roars in this period with varying strength but the series is probably over.
13514 03 Sep 2019 @ 0917 --- Micah Kipple Roar but no eruption.
13438 28 Aug 2019 @ 0920 --- c.barwin roar and brief sloshing
13292 16 Aug 2019 @ 2108 --- MikeG (wc) Large roar or small minor eruption at 21:08
13190 12 Aug 2019 @ 1231 --- Betty possibly Lion ie. There was steam visible on VEC static at 1231
12858 28 Jul 2019 @ 1859 --- Kitt B I saw Lion erupting from the cafeteria, apparently near end, but it was ie when I called it. Don't know why it was flagged. Just couldn't put NE (near end) since that isn't a choice. Lion initials can erupt for 6 minutes.
12425 09 Jul 2019 @ 1907 --- K.Cooper Lion had a false start at this time, may have been a minor, but the duration did not stipulate a minor eruption entry.
11533 02 Jun 2019 @ 1733 02 Jun 2019 @ 1907 JSJ Roars at late 1733 to 1734 (= immediately after end of 4th eruption in series). Roars at 1836 and 1841. Roars and water sprays at 1844, 1846, 1848, 1849, and 1851. Soft roars at 1853 and 1856. Soft roars and water sprays at 1900, 1902, 1904, and 1905-1906. Soft roars at 1907.
11213 11 May 2019 @ 1304 --- udo Drinking fountain bubbler is sizzling and spitting to 1-3 inches.
11013 20 Apr 2019 @ 1303 --- Janet Jones Good roar at 1303 and another at 1305 with a little splash of water.
11005 20 Apr 2019 @ 1025 --- PCO Saw Lion ie at 1025. Almost positive its was an initial.
10728 05 Nov 2018 @ 0243 05 Nov 2018 @ 1713 TheHikingDude Why is there a big gap between? Was all entries deleted? Or did it actually not erupt that long?
10646 21 Oct 2018 @ 1158 21 Oct 2018 @ 1211 rbwhitaker Roars at 1158, 1201, 1204, 1205, 1208, 1211 but no Lion.
10620 18 Oct 2018 @ 1536 --- MikeG Possible minor eruption seen on 40x speed GOSA captures.
10389 23 Sep 2018 @ 1252 --- JarnoO 'Minor minor' at this time. To me seemed more than a roar. d=~6s.
10329 21 Sep 2018 @ 1715 --- Kitt B NPS just announced over radio that they will be opening the boardwalk section from Sawmill to Lion and along the front of Geyser Hill sometime this evening.
10390 20 Sep 2018 @ 1010 --- Siegmund Splashing and puffing (not in series yet)
10384 19 Sep 2018 @ 1023 19 Sep 2018 @ 1040 Siegmund Tried and failed to have 20th eruption in yesterday's series. Roars 1023, 1031, and 1037, "sneezes" 1034, 1035, and 1040, but no large splashes or serious attempt at erupting.
10286 18 Sep 2018 @ 1506 --- udo One of the bubblers that normally are only active before an initial is active now, assuming we're in a series.
10033 04 Sep 2018 @ 1926 --- BobInSLC good try at erupting or 30 second minor
9306 27 Jul 2018 @ 1409 --- JarnoO Very good attempt with water just above the cone, though didn't build into an eruption.
8611 10 Jun 2018 @ 0424 --- JarnoO Steaming heavily, some splashes/jets seen. Either late ie or didn't quite manage to erupt. [Edit after 0418 wc ini entry: caught the end of the initial]
8013 27 Apr 2018 @ 0636 --- Micah Kipple Light splashing
7959 12 Mar 2018 @ 1047 --- Kevin L Could have had a 2nd between 1036 and 1047. Cam was zoomed into the Grand eruption during that time. No 3rd, just a few puffs.
7956 08 Mar 2018 @ 1542 --- DaveM major eruption at 1542 after 1539 minor
7948 20 Feb 2018 @ 0435 --- Betty Seemed to erupt, seen on overnight capture, but view was not clear enough to be sure
7881 28 Jan 2018 @ 0715 --- Graham Series of roars but no eruption. Booo.
7854 28 Nov 2017 @ 2222 28 Nov 2017 @ 2359 JarnoO At least 2 eruptions were missed due to steam. Dangit, steam from between Castle and Grand!
7837 22 Nov 2017 @ 0235 --- jh23487 There was a bit of steam from Lion from 0235 to 0236, possibly a minor?
7816 05 Nov 2017 @ 0415 --- JarnoO Appeared to be in a post-eruptive steam phase.
6207 09 Sep 2017 @ 1148 09 Sep 2017 @ 1223 udo 6 roars, 3 with splashes, series ended.
5668 03 Sep 2017 @ 0955 --- udo Last reported eruption was 0608. Bubblers are drooling less than 4 hours afterwards.
4500 19 Jul 2017 @ 1120 --- udo Water is flowing from both bubblers bit not bursting to any significant height yet.
4335 19 Jun 2017 @ 0818 --- JarnoO Have not seen a (potential) Lion eruption on the overnight captures.
4121 23 May 2017 @ 0314 --- JarnoO POSSIBLE eruption. Too dark for me to be certain, even for a questionable entry.
4122 23 May 2017 @ 0143 --- JarnoO POSSIBLE initial of series. Too dark for me to be certain, even for a questionable entry.
3964 01 Apr 2017 @ 1310 --- Betty chat visitor report it is ie. Maybe the initial
3909 14 Jan 2017 @ 0954 --- DaveM Either Lion or Beehive at 0820
3907 09 Jan 2017 @ 0058 --- Betty Maybe erupting, but it could be Beehive as well. Lasted about 6 min, so it was possibly initial
3874 16 Nov 2016 @ 1824 16 Nov 2016 @ 1849 JarnoO Might've erupted or tried to erupt. I cannot tell if it actually DID erupt, since it was quite foggy at 1824 and wasn't able to see any further than Old Faithful at 1849. Series continued till at least 2156.
3781 13 Oct 2016 @ 1409 13 Oct 2016 @ 1429 udo Roars 1409, 1414, 1416, 1417, 1419, 1423,
3741 03 Oct 2016 @ 0252 --- Betty Possible eruption behind OF steam
3681 17 Sep 2016 @ 1639 --- Graham Big splash out of Lion but not enough to call a minor. Looks like a series of 1 unless it can come back from that splash and erupt.
3600 04 Sep 2016 @ 0940 --- BobInSLC Almost erupted, strongest try without going I've seen. lasted 2 minutes.
3564 28 Aug 2016 @ 1431 --- Betty One tall burst, lasted ~20 sec
3506 18 Aug 2016 @ 1505 18 Aug 2016 @ 1513 Casey Two powerful seconds-long surges at 1505 and 1513 observed on webcam. There was debate as to whether they qualified as minor eruptions or not.
3125 23 Jun 2016 @ 1113 --- udo Roar 1113. Roarlet 1114 & 1123 & 1126 & 1128
3058 12 Jun 2016 @ 0043 --- JarnoO MAY have erupted. It was suddenly in the background very steamy while OF erupted and I'm pretty sure it wasn't the steam of OF.
2960 03 Jun 2016 @ 1516 03 Jun 2016 @ 1628 JSJ Noticed Lion spits at 1516, 1525, 1530, 1542, 1543, 1605, and 1628.
2764 20 Apr 2016 @ 1213 --- udo 1st roar 1213, 2nd 1217, 3rd 1219, 4th 1222, burp 1228, weak 1233. DNE
2744 16 Apr 2016 @ 1840 --- User34 New "drinking fountain" vent a couple feet to the right and in front of the old one
2722 09 Apr 2016 @ 1058 09 Apr 2016 @ 1059 JSJ Low, brief spouting at 1058 and 1059.
2718 26 Mar 2016 @ 2017 --- Graham Still no Lion since this morning.
2709 12 Mar 2016 @ 1307 12 Mar 2016 @ 1322 JSJ Several seconds of moderately low spouting at 1307 (webcam observation). Also a couple seconds of low spouting at near-latest 1319. Spitting at late 1321 and early 1322.
2653 17 Jan 2016 @ 1529 17 Jan 2016 @ 1541 JSJ Eruption # 2 in Lion Geyser's series very likely occurred while webcam was focused on Grand Geyser's 1529 to 1541 eruption.
2649 17 Jan 2016 @ 0745 --- Graham Doing terminal roars, no more eruptions in series.
2644 15 Jan 2016 @ 1700 15 Jan 2016 @ 1715 JSJ Brief eruptive spouting from late 1700 to early 1701 & at 1714.
2424 26 Sep 2015 @ 1327 --- JSJ ~1 to 2 seconds of moderately low spouting at 1327 (webcam observation).
2286 07 Sep 2015 @ 1146 --- BobInSLC Lion minors at 11:46 and 11:48
2146 15 Aug 2015 @ 1123 15 Aug 2015 @ 1124 JSJ Occasional spitting at 1123 to 1124.
2066 09 Aug 2015 @ 0600 --- Jake splashing above cone. working towards initial
2039 07 Aug 2015 @ 0550 --- RyanMaurer huffing and puffing but no eruption. must have ended a series.
1847 06 Jul 2015 @ 2004 --- BobInSLC big sustained splash, almost erupted
731 12 Jan 2013 @ 0755 --- Graham Probably a Lion eruption at 0755ie based on stean clouds but not sure. Matches up with the 0905 time reported later.
715 14 Nov 2012 @ 1214 --- Pat Snyder 1214 Lion is an initial.
688 30 Oct 2012 @ 1417 --- BB I believe the 1417 Lion was a minor. Just visible in one frame.
505 22 Sep 2012 @ 2150 22 Sep 2012 @ 2215 Jake series end. Failed roars 2150 - 2215. I left. N Goggles continued regular fill/drop cycle.
393 30 Aug 2012 @ 1314 30 Aug 2012 @ 1317 vw Lion had a fairly short eruption at 1314 ns, followed by a minor at 1317. Appeared to be two distinct eruptions on the stream.\r\n
309 19 Jun 2012 @ 0000 19 Jun 2012 @ 2359 EmilyW Lion is and sjould be marked as an initial.
282 08 Jun 2012 @ 2124 --- BB It looked like Lion started another series right before dark. Not 100% sure but it looked like it started around 2124, heavy steam in about three or four captures before it got too dark to see anything
232 15 May 2012 @ 1711 --- WillBoekel Roar 17:11
233 15 May 2012 @ 1711 --- WillBoekel Roar 17:11wc
223 09 May 2012 @ 1641 --- WillBoekel 1641WC roar
222 09 May 2012 @ 1636 --- WillBoekel 1636 Roar
194 29 Apr 2012 @ 1120 --- WillBoekel roar 1120
EntrySourceLinkComment
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.
08 Nov 2015 @ 1339 JSJ https://www.flickr.com/photos/jsjgeology/22462290807/in/photostream/ Webcam screen capture photo of Lion Geyser's 1:39 to 1:43 PM eruption on 8 November 2015.
09 May 2015 @ 1141 DaveM https://www.youtube.com/watch?v=zHeEI0QqiJA Capture showing the Lion did nto erupt at 1141. Note capture continues until Castle which started at 1210.
BaselineDistance (ft)Description
South side 100North edge of the walk near Heart Spring
North side 100North edge of the walk near North Goggles Geyser