Last Known Eruption
155d 14h 14m ago

Latest Eruptions

Eruption DurationInterval
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
23 Jul 1994 @ 200238m 1d 0m
22 Jul 1994 @ 200214d 22h 22m
07 Jul 1994 @ 2140 ie15d 13h 0m
22 Jun 1994 @ 084010d 11h 54m
11 Jun 1994 @ 2046 ie11d 7h 22m
31 May 1994 @ 13249d 16h 54m
21 May 1994 @ 203013d 16h 0m
08 May 1994 @ 0430 A5y 297d 16h 58m
15 Jul 1988 @ 11324m 8y 302d 2h 27m
19 Sep 1979 @ 09051y 6d 9h 5m
13 Sep 1978 @ 0000 A3d 12h 33m
09 Sep 1978 @ 1127 ie1d 3h 27m
08 Sep 1978 @ 080015m 5d 4h 0m
03 Sep 1978 @ 0400 A3d 1h 0m

Interval Statistics

Interval Count100
Min11h 15m
Max8y 302d 2h 27m
Mean159d 12h 7m
Median10d 2h 19m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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.
18394 12 Jul 2021 @ 1039 --- cb cycling steam. Jetsam pool is down 2.5'+
18362 10 Jul 2021 @ 2136 --- annelies8 cycling between loud steam and more quiet, boardwalk is wet
18307 07 Jul 2021 @ 0933 --- cb In constant loud (but I've heard louder) steam phase.
18305 06 Jul 2021 @ 1826 --- WillBoekel intermittent decent roaring steam with a little water mixed in
18299 06 Jul 2021 @ 0846 --- MAB dry forced steam - cycling noisy and quiet - mixed water in the next hours occasionally after the noisy roars
18258 03 Jul 2021 @ 1853 --- MAB Rrrroaring loudly with Strong forced steam
18180 28 Jun 2021 @ 2045 28 Jun 2021 @ 2059 TheHikingDude Alternating between silent and very VERY loud steam phase. Constant loud roar at 20:57
18070 24 Jun 2021 @ 1032 --- Graham In noisy steam phase.
18036 22 Jun 2021 @ 1941 --- MAB cycling into water as I walked out
18042 22 Jun 2021 @ 0852 --- MAB huffing
17812 15 Jun 2021 @ 1534 --- cb Ledge is cycling between a thin veil of water and forceful steam. It is not roaring. Jetsam is milky muddy light brown and has 3 boiling points on the north edge of the pool. Valve is spitting water.
17784 14 Jun 2021 @ 1555 --- Graham Not erupting or noisy steam. Some huffing from Red Vent.
17548 07 Jun 2021 @ 0857 --- MAB dry steam fairly quiet - heard it return to mixed water at 0954 - then quiet - also other times but too windy to hear the change - not powerfully noisy
17441 04 Jun 2021 @ 1113 --- cb cycling weak roar with quiet periods ~ 30s intervals
17463 04 Jun 2021 @ 0915 --- MAB quiet
17419 02 Jun 2021 @ 1100 02 Jun 2021 @ 1210 Tara in constant steam, gently roaring
17359 01 Jun 2021 @ 2100 --- MAB still roaring
17352 01 Jun 2021 @ 0900 --- MAB roaring
17208 27 May 2021 @ 0902 --- MAB roaring
17160 21 May 2021 @ 1100 --- cb cycling forced, loud steam and quiet periods. No water in the steam. Palm pool down ~3'
17143 19 May 2021 @ 0916 --- MAB roaring steam
17133 18 May 2021 @ 1250 --- Skookum From 1250 to 1815, Ledge was in a powerful, noisy steam phase. Times noted were upon entering and exiting Porcelain Basin.
17090 14 May 2021 @ 1505 --- cb Ledge was very quiet when I arrived. 1503 I heard a weak roar and Ledge was in weak, mixed water, eruption. Seems to be having weak mixed water cycles.
16965 30 Apr 2021 @ 0625 --- RMichaels In roaring steam phase at this time.
16956 29 Apr 2021 @ 1302 29 Apr 2021 @ 1530 DanS Cycling between quiet steam and more forceful Steam with a little water.
16942 28 Apr 2021 @ 0939 --- MAB All day - cycling with high pressure steam with mixed water off and on - sometimes heavy - when I thought it was done heavy water would return well past 1700
16838 04 Feb 2021 @ 1435 --- Micah Kipple In roaring steam phase.
16801 05 Jan 2021 @ 1510 --- Micah Kipple In loud powerful steam phase. Was not yesterday.
16492 30 Oct 2020 @ 1429 --- steve Ledge is pushing out steam with little to no water.
16412 12 Oct 2020 @ 0358 --- cb Again Ledge woke me up in LOUD roaring, whistling at times, steam phase! I had to check the seismo to see if it was Steamboat but no signature on the graph so its obviously Ledge! A VERY loud Ledge eruption!
16411 11 Oct 2020 @ 1445 11 Oct 2020 @ 1530 jonp Intermittent periods of light water spray and forced steam
16403 10 Oct 2020 @ 1320 --- cb Ledge is fairly quiet today. Occationally cycling from very quiet to a quieter steamy roar (is that an oxymoron?) Jetsam is down 1' below overflow and is a murky light brown color with some scummy foam on the edges. Valve is gently steaming and the Palm pool is low.
16364 07 Oct 2020 @ 2100 --- cb I can hear Ledge in LOUD steam phase eruption from the trailer in the government area! It was not ie when I left the basin around 1830.
16350 06 Oct 2020 @ 1450 --- cb cycling between weak steam and a thin Vail of wispy jets of water. Valve spitting a bit of water but mostly whistling steam. Jetsam is a few inches below overflow and the side vent is erupting to ~6". Palm pool is low.
16261 26 Sep 2020 @ 0230 --- cb Heard it at the government area. LOUD roaring, thought it was SB but it was Ledge. 1410 Ledge is still is loud steam phase eruption. Runoff channel does not look like it had a water phase eruption. No eroded out channels. Jetsam pool is high, 3" below overflow
16241 23 Sep 2020 @ 1712 --- DanS In steam phase.
16222 21 Sep 2020 @ 1545 --- cb Ledge is putting out more water within the steam than yesterday. Still cycling between weak steam and a mixed water steam phase with a thicker Vail of water than I've seen this summer. Palm pool is higher (4" below overflow. Water running into it from Black Growler or Ledge?) Jetsam and Valve are the same.
16209 20 Sep 2020 @ 1531 --- cb Today it's quietly steaming but it occasionally has an energy surge and briefly roars for less than a minute. Jetsam pool is below overflow by ~1'. Its side vent is erupting continuously to ~4". Valve is gently steaming. Palm pool is ~8" below overflow and quiet.
16134 14 Sep 2020 @ 1042 --- Graham In noisy steam phase.
15899 30 Aug 2020 @ 1500 --- cb Ledge is in roaring steam phase. no water, full steam eruption and seems it's been this way for awhile. Jetsam is about 1' below overflow, palm pool is full and Valve is in a milder form of steam phase.
15700 23 Aug 2020 @ 0610 --- ypcaribou Roar heard from start of path at parking lot. Still roaring at 0845 when I left basin.
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.