Last Known Eruption
3h 7m ago

Latest Eruptions

Eruption DurationInterval
09 Dec 2019 @ 1115 wc1h 30m
09 Dec 2019 @ 0945 wc ini9h 59m
08 Dec 2019 @ 2346 wc1h 11m
08 Dec 2019 @ 2235 wc1h 11m
08 Dec 2019 @ 2124 wc1h 23m
08 Dec 2019 @ 2001 wc ini8h 20m
08 Dec 2019 @ 1141 wc58m
08 Dec 2019 @ 1043 wc1h 14m
08 Dec 2019 @ 0929 ie wc ini13h 22m
07 Dec 2019 @ 2007 wc1h 3m
07 Dec 2019 @ 1904 wc1h 20m
07 Dec 2019 @ 1744 wc1h 28m
07 Dec 2019 @ 1616 wc ini7h 53m
07 Dec 2019 @ 0823 wc min1h 17m
07 Dec 2019 @ 0706 wc1h 7m
07 Dec 2019 @ 0559 wc15h 11m
06 Dec 2019 @ 1448 wc1h 28m
06 Dec 2019 @ 1320 ns wc ini6h 52m
06 Dec 2019 @ 0628 ns wc ini11h 40m
05 Dec 2019 @ 1848 wc14m
05 Dec 2019 @ 1834 wc min1h 22m
05 Dec 2019 @ 1712 ns wc1h 17m
05 Dec 2019 @ 1555 wc1h 19m
05 Dec 2019 @ 1436 ie wc6h 49m
05 Dec 2019 @ 0747 wc1h 23m
05 Dec 2019 @ 0624 wc ini>10m 7h 44m
04 Dec 2019 @ 2240 wc ini8h 22m
04 Dec 2019 @ 1418 ns wc1h 24m
04 Dec 2019 @ 1254 ie wc10h 34m
04 Dec 2019 @ 0220 wc1h 13m
04 Dec 2019 @ 0107 wc1h 25m
03 Dec 2019 @ 2342 wc ini9h 45m
03 Dec 2019 @ 1357 wc ini9h 9m
03 Dec 2019 @ 0448 wc1h 21m
03 Dec 2019 @ 0327 wc ini7h 42m
02 Dec 2019 @ 1945 wc1h 23m
02 Dec 2019 @ 1822 wc ini1d 2h 52m
01 Dec 2019 @ 1530 wc1h 16m
01 Dec 2019 @ 1414 ie wc1h 22m
01 Dec 2019 @ 1252 wc ini16h 14m
30 Nov 2019 @ 2038 ie wc1h 17m
30 Nov 2019 @ 1921 wc1h 15m
30 Nov 2019 @ 1806 wc ini7h 47m
30 Nov 2019 @ 1019 wc1h 29m
30 Nov 2019 @ 0850 ie wc21h 10m
29 Nov 2019 @ 1140 ie wc1h 24m
29 Nov 2019 @ 1016 ns wc ini1d 1h 41m
28 Nov 2019 @ 0835 wc1h 19m
28 Nov 2019 @ 0716 wc ini16h 29m
27 Nov 2019 @ 1447 wc1h 23m
27 Nov 2019 @ 1324 wc ini22h 12m
26 Nov 2019 @ 1512 ie wc1h 9m
26 Nov 2019 @ 1403 ns wc1h 4m
26 Nov 2019 @ 1259 wc1h 11m
26 Nov 2019 @ 1148 ns wc1h 23m
26 Nov 2019 @ 1025 wc1h 20m
26 Nov 2019 @ 0905 ie wc15h 15m
25 Nov 2019 @ 1750 wc ini14h 10m
25 Nov 2019 @ 0340 wc1h 14m
25 Nov 2019 @ 0226 wc ini9h 18m
24 Nov 2019 @ 1708 wc1h 21m
24 Nov 2019 @ 1547 wc1h 28m
24 Nov 2019 @ 1419 wc ini5h 49m
24 Nov 2019 @ 0830 ie wc1h 12m
24 Nov 2019 @ 0718 wc1h 15m
24 Nov 2019 @ 0603 wc ini9h 48m
23 Nov 2019 @ 2015 wc1h 14m
23 Nov 2019 @ 1901 wc1h 15m
23 Nov 2019 @ 1746 ie wc ini10h 40m
23 Nov 2019 @ 0706 wc23h 37m
22 Nov 2019 @ 0729 wc2h 28m
22 Nov 2019 @ 0501 wc13h 40m
21 Nov 2019 @ 1521 wc1h 40m
21 Nov 2019 @ 1341 wc1h 32m
21 Nov 2019 @ 1209 wc6h 59m
21 Nov 2019 @ 0510 wc1h 5m
21 Nov 2019 @ 0405 ie wc1h 26m
21 Nov 2019 @ 0239 wc ini12h 52m
20 Nov 2019 @ 1347 wc1h 18m
20 Nov 2019 @ 1229 wc1h 17m
20 Nov 2019 @ 1112 wc ini7h 53m
20 Nov 2019 @ 0319 wc9h 52m
19 Nov 2019 @ 1727 ns wc min14m
19 Nov 2019 @ 1713 wc min1h 14m
19 Nov 2019 @ 1559 ns wc1h 16m
19 Nov 2019 @ 1443 wc~3m 30s 1h 16m
19 Nov 2019 @ 1327 wc>3m 27s 1h 22m
19 Nov 2019 @ 1205 wc ini~6m 28s 8h 3m
19 Nov 2019 @ 0402 wc1h 6m
19 Nov 2019 @ 0256 wc1h 8m
19 Nov 2019 @ 0148 wc1h 19m
19 Nov 2019 @ 0029 wc9h 14m
18 Nov 2019 @ 1515 ns1h 17m
18 Nov 2019 @ 1358 ie5h 20m
18 Nov 2019 @ 0838 ie11h 48m
17 Nov 2019 @ 2050 wc1h 9m
17 Nov 2019 @ 1941 wc1h 13m
17 Nov 2019 @ 1828 ie wc12h 45m
17 Nov 2019 @ 0543 ini8h 5m
16 Nov 2019 @ 2138 wc min3h 34m

Interval Statistics

Interval Count100
Min14m
Max1d 2h 52m
Mean5h 27m
Median1h 24m
Initial-to-Initial
Interval Count25
Min6h 52m
Max2d 15h 7m
Mean21h 16m
Median17h 13m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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
151 02 Apr 2012 @ 0705 02 Apr 2012 @ 0715 EmilyW Some said they saw lion between 705 and 715. Well see
146 26 Mar 2012 @ 0000 26 Mar 2012 @ 2359 Graham Could not see Lion for a couple of hours so it probably erupted more.
107 16 Feb 2012 @ 0000 16 Feb 2012 @ 2359 EmilyW I\\\'d like to mention lion\\\'s interval because this one is exceptionally long even for series. Either its erupting at night or just a long interval. I guess we\\\'ll wait a long time before we use the d word though.
76 05 Jan 2012 @ 0228 --- BB There was something erupting at 0228. I was thinking Lion, in the chatroom there was a feeling it might have been BH, based on the interval from the last Lion eruption on 01/04.\r\n\r\nI finally compared captures, and I still feel it was rather Lion than BH. The location was too far right for BH.\r\n\r\nUnfortunately it was too dark later, so I don\'t know if there was another eruption later on.
728 26 Nov 2011 @ 1224 --- WillBoekel Electronic logger failed at 12:24
59 14 Oct 2011 @ 0217 14 Oct 2011 @ 0309 BB I have three nighttime eruptions in my captures that are hard to tell apart. After comparing them to daytime captures I think that BH probably erupted at 0217 and Lion at 0134 and 0309. These are all ie times as I only capture one frame every 30 seconds.
28 14 Sep 2011 @ 0320 --- BB One capture with heavy steam from Lion at 3:20... maybe a minor?
974 23 Jun 2008 @ 1100 23 Jun 2008 @ 1159 BoekelUpload 11:xx
962 24 May 2008 @ 1540 24 May 2008 @ 1549 BoekelUpload 15:4x
957 02 May 2008 @ 1010 02 May 2008 @ 1019 BoekelUpload 10:1x
1354 13 Jun 2007 @ 1240 13 Jun 2007 @ 1249 BoekelUpload 12:4x
12715 15 Aug 1994 @ 1320 15 Aug 1994 @ 1329 JarnoO 13:2x ini
12697 21 Jul 1994 @ 1911 21 Jul 1994 @ 1930 JarnoO steam roars
12686 05 Jul 1994 @ 1850 05 Jul 1994 @ 1859 JarnoO 18:5x ie
12648 23 May 1994 @ 1000 23 May 1994 @ 1050 JarnoO 10:x0 ini d=>5; {most likely 1030 based on assumed follow-up eruption}
12590 26 Jan 1994 @ 1301 --- JarnoO roar w/ H2O
12574 01 Jan 1994 @ 1302 --- JarnoO roar with water
12339 23 Oct 1993 @ 1440 --- JarnoO false start
12284 02 Aug 1993 @ 0402 --- JarnoO roar.
12269 16 Jul 1993 @ 0710 16 Jul 1993 @ 0725 JarnoO concluding roars
12243 26 Jun 1993 @ 1720 26 Jun 1993 @ 1729 JarnoO 17:2x; initial
12228 18 Jun 1993 @ 2345 --- JarnoO no initial as of 2345
12141 08 Feb 1993 @ 1437 --- JarnoO large splash
6857 26 Sep 1992 @ 1620 26 Sep 1992 @ 1629 JarnoO 16:2x
EntrySourceLinkComment
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.
12 Mar 2014 @ 0343 lt http://imgur.com/1QfYneu screencap of static image
18 Dec 2013 @ 1154 Richlg96 http://youtu.be/wKIUPHHEGW0 Lion 1154 2013/12/18
BaselineDistance (ft)Description
South side 100North edge of the walk near Heart Spring
North side 100North edge of the walk near North Goggles Geyser


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