Last Known Eruption
165d 5h 48m ago

Latest Eruptions

Eruption DurationInterval
10 Oct 2022 @ 0758 E4d 11h 18m
05 Oct 2022 @ 2040 E5d 15h 40m
30 Sep 2022 @ 0500 E4d 2h 9m
26 Sep 2022 @ 0251 E5d 22h 36m
20 Sep 2022 @ 0415 E4d 1h 39m
16 Sep 2022 @ 0236 E5d 21h 36m
10 Sep 2022 @ 0500 E5d 7h 49m
04 Sep 2022 @ 2111 E4d 17h 41m
31 Aug 2022 @ 0330 E5d 2h 30m
26 Aug 2022 @ 0100 E5d 5h 7m
20 Aug 2022 @ 1953 E1d 23h 35m
18 Aug 2022 @ 2018 E3d 15h 14m
15 Aug 2022 @ 0504 E maj2d 5h 1m
13 Aug 2022 @ 0003 E maj102d 8h 25m
02 May 2022 @ 1538 ie4d 5h 31m
28 Apr 2022 @ 1007 ie3d 25m
25 Apr 2022 @ 0942 ie1d 22h 44m
23 Apr 2022 @ 1058 ie202d 7h 58m
03 Oct 2021 @ 0300 A137d 9h 35m
18 May 2021 @ 1725 ?Unknown18d 4h 56m
30 Apr 2021 @ 1229 ie4d 1h 9m
26 Apr 2021 @ 1120 ie265d 22h 3m
03 Aug 2020 @ 1317 ? ie36d 6h 56m
28 Jun 2020 @ 0621 ie4d 20h 51m
23 Jun 2020 @ 0930 ie>30m 23d 14h 48m
30 May 2020 @ 184214d 3h 34m
16 May 2020 @ 1508 ie241d 3h 29m
18 Sep 2019 @ 1139 ? majFirst heard at 11:25am30d 3h 47m
19 Aug 2019 @ 0752 ? ANot Known35d 23h 52m
14 Jul 2019 @ 0800 ? AStill Going as of 13:5676d 20h 51m
28 Apr 2019 @ 1109 ie3y 63d 24m
25 Feb 2016 @ 0945 ? ie59d 19h 32m
27 Dec 2015 @ 1413 ns56d 2h 29m
01 Nov 2015 @ 1144 ns>1h 20m 10d 11h 44m
22 Oct 2015 @ 0100 A39d 16h 39m
12 Sep 2015 @ 0821 ns>1h 33m 5d 16h 41m
06 Sep 2015 @ 15406d 7h 3m
31 Aug 2015 @ 08371h 26m 5d 22h 24m
25 Aug 2015 @ 10137d 18h 14m
17 Aug 2015 @ 15595d 11h 29m
12 Aug 2015 @ 0430 A5d 10h 19m
06 Aug 2015 @ 18114d 9h 22m
02 Aug 2015 @ 08496d 17h 29m
26 Jul 2015 @ 1520 ie3d 19h 17m
22 Jul 2015 @ 20034d 6h 23m
18 Jul 2015 @ 13404d 12h 10m
14 Jul 2015 @ 0130 A6d 1h 30m
08 Jul 2015 @ 0000 A6d 9h 16m
01 Jul 2015 @ 1444 ie3d 22h 28m
27 Jun 2015 @ 16164d 10h 22m
23 Jun 2015 @ 05543d 23h 58m
19 Jun 2015 @ 0556 ie3d 23h 36m
15 Jun 2015 @ 0620 ie4d 1h 20m
11 Jun 2015 @ 0500 A4d 9h 3m
06 Jun 2015 @ 19574d 35m
02 Jun 2015 @ 19224d 5h 50m
29 May 2015 @ 1332 maj3d 16h 51m
25 May 2015 @ 2041 maj4d 11h 41m
21 May 2015 @ 0900 A7d 1h 0m
14 May 2015 @ 0800 A2d 21h 21m
11 May 2015 @ 10391h 13m 3d 2h 39m
08 May 2015 @ 0800 A3d 23h 55m
04 May 2015 @ 0805 A maj4d 20h 21m
29 Apr 2015 @ 11441h 56m 1d 21m
28 Apr 2015 @ 11231h 17m 9d 1h 0m
19 Apr 2015 @ 1023 ie1d 2h 35m
18 Apr 2015 @ 0748 ie18d 12h 48m
30 Mar 2015 @ 1900 A1y 319d 7h 30m
15 May 2013 @ 1130 ie1y 289d 10m
31 Jul 2011 @ 112020d 20h 20m
10 Jul 2011 @ 1500 A1y 334d 23h 0m
09 Aug 2009 @ 1600315d 10m
28 Sep 2008 @ 15502d 1h 50m
26 Sep 2008 @ 14008d 2h 24m
18 Sep 2008 @ 113618d 8h 36m
31 Aug 2008 @ 0300 A12d 15h 24m
18 Aug 2008 @ 1136 A1d 20h 46m
16 Aug 2008 @ 1450 ns40m 8d 50m
08 Aug 2008 @ 140012d 22h 53m
26 Jul 2008 @ 15072y 46d 22h 7m
10 Jun 2006 @ 17007y 14d 3h 45m
29 May 1999 @ 1315 ? ie1y 39d 18h 34m
19 Apr 1998 @ 1841205d 4h 32m
26 Sep 1997 @ 1409 min1y 80d 5h 45m
08 Jul 1996 @ 0824 ie119d 7h 24m
11 Mar 1996 @ 0000 A111d 0m
21 Nov 1995 @ 0000 A1h 33m 18d 0m
03 Nov 1995 @ 0000 A59d 5h 0m
04 Sep 1995 @ 2000 A2d 20h 0m
02 Sep 1995 @ 0000 A41d 11h 20m
22 Jul 1995 @ 12407d 13h 10m
14 Jul 1995 @ 233015d 17h 30m
29 Jun 1995 @ 0600 A23d 6h 0m
06 Jun 1995 @ 0000 A8d 14h 30m
28 May 1995 @ 0930 A12d 3h 11m
16 May 1995 @ 0619221d 1h 49m
07 Oct 1994 @ 0430 A19d 22h 30m
17 Sep 1994 @ 0600 ? A11h 15m
16 Sep 1994 @ 1845 A19d 12h 9m
28 Aug 1994 @ 063635d 10h 34m

Interval Statistics

Interval Count100
Min11h 15m
Max7y 14d 3h 45m
Mean103d 1h 19m
Median6d 21h 14m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
24939 21 Jan 2023 @ 1530 --- ypcaribou Time approximate. Seen southbound from pullout on the long, downhill stretch of road between Norris Overlook & Norris Campground. "Ledge area was a lot more steamy than Steamboat. (Ledge area steam very tall.) But Steamboat had a few bursts of steam. No water bursts seen from either."
24606 31 Oct 2022 @ 0828 31 Oct 2022 @ 1241 MAB Steam phase that quiets then increases with more force - repeat
24587 30 Oct 2022 @ 1830 --- MAB strong continuous high pressure forced steam - I landed on my derriere on the bw by Basin G - freezing mist landing on my book at the Constant bench!
24566 30 Oct 2022 @ 1359 --- ypcaribou Forceful steam, loud, no water spray I could see from near I S.
24594 30 Oct 2022 @ 0845 --- MAB audible from just past bookstore
24521 29 Oct 2022 @ 1804 --- MAB consistent forced moist steam then total pauses
24536 29 Oct 2022 @ 0833 --- MAB seems quiet but Intersection Spgs are noisy! Definitely not roaring tho
24508 28 Oct 2022 @ 0835 28 Oct 2022 @ 1841 MAB fairly quiet in the morn and seemed to get wetter as the day went on
24466 21 Oct 2022 @ 1837 --- MAB cycling between fairly quiet and hollow steam as best I could hear in the swirling winds - did not walk down there
24394 15 Oct 2022 @ 1820 --- MAB LOUD misty steam phase
24414 15 Oct 2022 @ 0820 --- MAB In high pressure steam audible between bookstore and museum
24377 14 Oct 2022 @ 1827 --- MAB strong mixed forced steam
24387 14 Oct 2022 @ 0845 14 Oct 2022 @ 1130 MAB cycling between quiet and wet - neither very noisy
24297 07 Oct 2022 @ 1055 07 Oct 2022 @ 1300 DanS Alternating between strong steam and moments of quiet with steam and a little water from red vent. White vent appears to be steam only.
24263 05 Oct 2022 @ 1439 --- cb cycling mix steam water with brief semi pauses. Jetsam is overflowing, is a cloudy turquoise blue color
23973 20 Sep 2022 @ 1935 --- ypcaribou Powerful steam heard from museum and parking lot on way out.
23948 20 Sep 2022 @ 1519 --- ypcaribou Powerful, loud steam as observed from museum.
23885 17 Sep 2022 @ 1710 17 Sep 2022 @ 1836 MAB dry hollow sounding forced steam alternating w quiet
23822 14 Sep 2022 @ 1403 14 Sep 2022 @ 1436 ThomasR In mixed phase as seen from various angles in the Porcelain Basin. Fine jets of water alternating with steam.
23809 13 Sep 2022 @ 1414 --- CP Very quiet. No roar at all.
23415 26 Aug 2022 @ 1030 --- cb forced loud steam. Very visable steam cloud from the intersection. Much bigger than the wispy steam coming from SB.
23374 23 Aug 2022 @ 1030 23 Aug 2022 @ 1825 MAB cycling in and out of mixed water + steam phase - never real forceful
23299 20 Aug 2022 @ 0917 --- steve Ledge is lightly steaming with only minor gurgling.
23282 19 Aug 2022 @ 1220 --- Craigmon99 Forced steam. Roaring
23252 18 Aug 2022 @ 1835 18 Aug 2022 @ 1844 MAB fairly steady voluminous water sprays during the walk thru via steps - tall but Quiet! As I passed Basin G there was a pause and noisier mixed phase w forced steam
23158 13 Aug 2022 @ 0815 --- bbev Large steam cloud from the road. Roaring heard from parking lot. Mixed water and roaring steam, with Jetsum and palm pool overflowing into runoff channel. Have not heard Ledge from parking lot prior to today.
23043 05 Aug 2022 @ 0915 --- cb Ledge is in full steam with light consistent roaring. I heard it last night at 0230 roaring. No water eruption i think as the runoff channels still have green algae in them. @1300 ledge is back to cycling heavy steam with a thin veil of water, to a few minutes of quiet. Jetsam pool is high again > ~3" below overflow & clay colored.
23004 03 Aug 2022 @ 1128 --- cb cycling weak mixed steam water. No roar.
22917 27 Jul 2022 @ 1900 --- MAB Morning obs at Ledge were quiet then a hiss with a spritz of water - as seen from Trinket @ 1900 a lot of water had returned to Ledge
22853 26 Jul 2022 @ 0940 26 Jul 2022 @ 1140 cb Ledge is mostly quiet. occational weak roars, no water
22756 21 Jul 2022 @ 0810 21 Jul 2022 @ 0945 nails Pretty quiet, the periodic huffs can be missed if you don’t listen for them.
22749 20 Jul 2022 @ 2001 20 Jul 2022 @ 2021 nails Still periodically noisier steam, but overall much quieter than yesterday.
22723 20 Jul 2022 @ 1030 20 Jul 2022 @ 1127 cb Ledge is mostly quiet & gently steaming.
22707 19 Jul 2022 @ 1334 --- cb Ledge is still cycling but much quieter today. briefer & weaker roaring/steam periods followed by quiet spells.
22698 19 Jul 2022 @ 0810 19 Jul 2022 @ 1220 nails Periodically loud. No spritzes of water.
22658 17 Jul 2022 @ 1922 --- MAB still with the cyclic roaring ~ adios until we meet again
22664 17 Jul 2022 @ 0836 17 Jul 2022 @ 1500 MAB LOUD roar w cyclic wet spray and very brief quiet spells - repeated for 6hrs
22627 16 Jul 2022 @ 1045 16 Jul 2022 @ 1424 cb Ledge is having longer quiet spells and the roar is not as loud as it has been.
22544 13 Jul 2022 @ 1346 --- cb Still cycling steam/quiet but today there was longer quiet periods! thank gosh!
22524 12 Jul 2022 @ 1130 12 Jul 2022 @ 1513 cb Still..cycling..noisy...steam and short quiet periods
22498 11 Jul 2022 @ 1710 --- cb is much quieter. still mildly cycling
22398 08 Jul 2022 @ 0946 --- cb repeat... forceful steam cycling with quiet periods
22352 06 Jul 2022 @ 0916 --- cb still cycling loud forceful steam with periods of quiet.
22330 04 Jul 2022 @ 1841 --- cb STILL cycling forceful loud steam and quiet periods. Has,not,stopped!
22293 02 Jul 2022 @ 1733 --- cb Still cycling forceful steam & quiet periods. All day!
22240 30 Jun 2022 @ 1000 --- cb still cycling forceful steam & quiet periods
22216 29 Jun 2022 @ 1445 --- cb Still cycling noisy forceful steam, less than last few days, with quiet periods.
22178 28 Jun 2022 @ 1330 --- cb Ledge is still cycling between loudish forceful steam and quiet periods
22166 27 Jun 2022 @ 0819 27 Jun 2022 @ 1121 MAB Cycling between noisy forced steam - light mixed water - brief quiet moments & repeat
22122 25 Jun 2022 @ 1233 25 Jun 2022 @ 1253 cb still in forceful loud steam phase.
22098 24 Jun 2022 @ 0130 --- cb woke me up in LOUD STEAM phase in the gov. area.
22080 23 Jun 2022 @ 1230 23 Jun 2022 @ 1545 cb mostly quiet, cycling quiet spells with a thin, wispy 6' - 8' spray of water.
22066 20 Jun 2022 @ 1003 --- cb Ledge is in full steam mode
21708 03 Jun 2022 @ 0848 03 Jun 2022 @ 1100 MAB fairly quiet forced steam cycling in and out of light mixed water - neither mode very forceful
21638 01 Jun 2022 @ 1528 --- cb in forceful steam mixed with slight bit of water
21478 25 May 2022 @ 0730 25 May 2022 @ 0945 TSBryan roaring steam, audible from parking lot on arrival
21447 23 May 2022 @ 0846 --- MAB forced wet steam - whitish channels below
21299 15 May 2022 @ 0852 15 May 2022 @ 1228 MAB varying water sprays but fairly quiet- not at max steam - seemed to quiet w less water around 1130 but breeze picked up and so did # of visitors - more water at noonish - seems quieter {from above} leaving at 1250
21233 11 May 2022 @ 1941 --- MAB steady roaring heard from pretty far down the trail
21246 11 May 2022 @ 1007 11 May 2022 @ 1244 MAB morphed into very LOUD mixed steam phase - more violent less water ~1030 - mostly very noisy thru leaving @1244
21247 11 May 2022 @ 0852 11 May 2022 @ 1007 MAB variable wet mixed forced steam - fairly quiet
21204 06 May 2022 @ 0852 06 May 2022 @ 1300 MAB cycled through LOUD forced steam - then quiet - then water - repeat - it may have had less water on my way out but I didn't dally to find out
21173 05 May 2022 @ 1048 --- cb loud, forceful steam
21115 27 Apr 2022 @ 1628 27 Apr 2022 @ 1643 DanS Huffing, then switched over to steady steam with a little water.
21099 26 Apr 2022 @ 0855 26 Apr 2022 @ 1216 MAB mixed of forced steam and water ~3hrs I was present - sporadic
21071 24 Apr 2022 @ 1410 --- DanS Steaming quietly with a stronger huff of steam every few mins.
21034 18 Apr 2022 @ 0936 --- MAB cycling between quiet steam and moderately forced steam 0930-1230
20337 06 Nov 2021 @ 0808 --- MAB fairly quiet - the growler at Intersection Springs was noisier than Ledge from the intersection
20290 04 Nov 2021 @ 1646 --- MAB still ROARING - Jetsam Pool still full
20311 04 Nov 2021 @ 0826 --- MAB high pressure steam phase audible from bookstore - suspect overnight eruption after I left it splashing 1700 yesterday
20312 04 Nov 2021 @ 0720 --- RMichaels Roaring steam audible from parking lot.
20281 03 Nov 2021 @ 0824 --- MAB spraying splashing 2-8ft - no roar
20240 31 Oct 2021 @ 1145 --- DanS Alternating between steam and throwing water a few feet.
20227 30 Oct 2021 @ 1144 --- cb jetting water 5'-10'. no roar. @ 1242 not as active. Ledge is cycling between active water jetting and quiet periods. still no roar.
20206 29 Oct 2021 @ 0849 --- MAB lazy steam - Jetsam pretty full as seen thru steam
20179 28 Oct 2021 @ 0834 28 Oct 2021 @ 1522 MAB high pressure loud incessant steam audible from bookstore - path an ice rink all the way to Sunday - no water or change in intensity in 4 hours - seems classic post eruptive - Jetsam was full @ 0837 still full 1521
20139 27 Oct 2021 @ 1029 --- cb wispy, continuous jetting of water to 6'. no roar. Jetsam pool is high, turquoise blue/green & overflowing. Palm pool is high to the rim. Valve is steaming.
20073 21 Oct 2021 @ 1359 --- mwolf near continuous wispy water pulses 4-6'
20042 19 Oct 2021 @ 1200 --- cb gently steaming. no roar. interesting that below Ledge's vent the runoff channel is white about 10' down! looks like SB's runoff channel post eruptive.
20036 18 Oct 2021 @ 1549 --- mwolf in powerful steam phase
19999 16 Oct 2021 @ 1204 --- cb gently steaming, no water or loud roaring.
19911 06 Oct 2021 @ 1004 --- cb Still in continuous forceful steam phase. Jetsam is overflowing & a very milky/scummy light green color, Valve is steamy. Palm pool is very high also.
19903 05 Oct 2021 @ 0842 --- MAB in a steady roar walking in - not that hollow sound but smoother
19868 03 Oct 2021 @ 1723 --- cb Ledge is cycling between very quiet periods and periods of strong, heavy, forceful steam only. Run off channels really look no different than yesterday >they have water in them but have for the past week. Jetsam pool is high, overflowing toward Guardian and a murky light greencolor. Palm pool is higher than ive ever seen and Valve is gently steaming
19879 03 Oct 2021 @ 1350 --- ypcaribou Still steaming loudly and forcefully as we walked back to museum from Back Basin about 1350. Jetsam was quite full of colloidal blueish green water (as seen from path right below museum) at 1350.
19878 03 Oct 2021 @ 0716 --- ypcaribou Steam column seen from lot that rivaled Steamboat's in height on this chilly morning. Roar audible from metal museum sign. Quite loud from path junction below museum on Porcelain side. Saw nothing but steam and more steam and did not walk down there so not sure if it was spitting any water.
19817 30 Sep 2021 @ 1735 --- cb ledge is cyclically splashing & spraying water 4'-8' with not much steam ~every few minutes.
19704 23 Sep 2021 @ 1558 --- cb cycling water steam mix with brief pauses.
19647 18 Sep 2021 @ 1005 --- novakg Light water from vent. Steam not reaching the boardwalk.
19614 16 Sep 2021 @ 1153 --- cb Ledge is not as loud as its been. It is a mix of heavy water/steam cycling with brief quiet periods between. There is more water in Ledge's cycles than I've seen this summer or in previous FEW summers! Thicker column of water mixed with steam. Jetsam is 1' below rim with the side vent toward the Palm pool splashing to ~1'. And a small new feature below Jetsam in Ledge's runoff channel erupting to 6". Valve is weak steam and the Palm pool is VERY high.
19545 13 Sep 2021 @ 0849 --- MAB fairly quiet forced steam on arrival - heard light water return a few times - by end of day Loud Roaring Steam
19485 11 Sep 2021 @ 1045 11 Sep 2021 @ 1642 Graham In quiet steam.
19382 07 Sep 2021 @ 1740 --- CrisG loud roaring steam, first audible from the bend in the trail from Forgotten Fumarole
19103 27 Aug 2021 @ 0750 --- steve Roaring steam phase.for a minute or so, then light steam for half a minute before going back to roaring.
19002 22 Aug 2021 @ 1554 --- MAB arrived 0900 - Ledge cycling between quiet steam - noisy forced steam - and mixed water w steam for the duration of my stay til 1635 - same upon walking out 1933
18664 25 Jul 2021 @ 1815 --- cb VERY forceful steam. no water
18581 22 Jul 2021 @ 1250 --- Tara Variable roaring steam
18532 19 Jul 2021 @ 1700 19 Jul 2021 @ 1900 nails Alternating between low roaring and light hissing steam. Wind pushes steam to trail but it doesn’t get you very wet. Loudest about the time Black Growler is steaming.
18484 17 Jul 2021 @ 1918 --- cb Ledge is cycling between short, gentle, quiet periods to a moderate roar that mists the walkway with a tiny bit of spray.
18454 16 Jul 2021 @ 0844 16 Jul 2021 @ 1141 nails Intermittent noisy forced steam and quiet, not forced steam.
EntrySourceLinkComment
18 May 2021 @ 1725 ell-e https://imgur.com/2HQn2g9 Ledge as observed from the Boardwalk.
18 May 2021 @ 1725 ell-e https://imgur.com/aNLKSC4 Ledge as Observed before walking into the Porcelain Basin.
16 Aug 2008 @ 1450 Micah Kipple https://flic.kr/p/7LbXWv Photograph by Visitor
Baseline does not exist.