Last Known Eruption
15h 15m ago

Latest Eruptions

Eruption DurationInterval
15 Nov 2018 @ 1104 E maj7d 18h 48m
07 Nov 2018 @ 1616 E maj7d 8h 55m
31 Oct 2018 @ 0821 maj7d 12h 52m
23 Oct 2018 @ 1929 maj~1h8d 5h 17m
15 Oct 2018 @ 1412 maj26m 7d 3h 47m
08 Oct 2018 @ 1025 maj7d 15h 31m
30 Sep 2018 @ 1854 maj6d 13h 36m
24 Sep 2018 @ 0518 maj~1h 0m 6d 19h 42m
17 Sep 2018 @ 0936 maj1h 15m 5d 5h 13m
12 Sep 2018 @ 0423 maj~55m 4d 18h 3m
07 Sep 2018 @ 1020 maj43m 8s 5d 10h 59m
01 Sep 2018 @ 2321 maj5d 1h 51m
27 Aug 2018 @ 2130 maj5d 9h 47m
22 Aug 2018 @ 1143 maj14m 17d 21h 33m
04 Aug 2018 @ 1410 maj14d 15h 34m
20 Jul 2018 @ 2236 maj22m 14d 8h 59m
06 Jul 2018 @ 1337 maj32m 20d 20h 42m
15 Jun 2018 @ 1655 maj37m 4d 15h 49m
11 Jun 2018 @ 0106 maj6d 16h 2m
04 Jun 2018 @ 0904 maj30m 7d 13h 49m
27 May 2018 @ 1915 maj19m 7d 21h 27m
19 May 2018 @ 2148 maj6d 17h 57m
13 May 2018 @ 0351 E maj8d 4h 36m
04 May 2018 @ 2315 E maj7d 16h 45m
27 Apr 2018 @ 0630 E maj7d 14h 4m
19 Apr 2018 @ 1626 E maj35d 11h 5m
15 Mar 2018 @ 0521 E maj3y 193d 6h 38m
03 Sep 2014 @ 2243 E maj23m 1y 34d 3h 13m
31 Jul 2013 @ 1930 E maj6y 162d 2h 30m
21 Feb 2007 @ 16001y 274d 2h 19m
23 May 2005 @ 1441 maj1y 213d 18h 15m
22 Oct 2003 @ 2026 maj178d 16h 32m
27 Apr 2003 @ 0354 E maj32d 2h 22m
26 Mar 2003 @ 0032 E maj193d 3h 12m
13 Sep 2002 @ 2220 maj140d 20m
26 Apr 2002 @ 2200 ie maj1y 359d 16h 0m
02 May 2000 @ 0600 ie maj8y 214d 14h 11m
02 Oct 1991 @ 1549 maj1y 120d 7h 41m
04 Jun 1990 @ 0808237d 12h 31m
09 Oct 1989 @ 1937 A157d 8h 33m
05 May 1989 @ 1104 maj12m 109d 20h 19m
15 Jan 1989 @ 1345 A maj4y 112d 10m
26 Sep 1984 @ 1435 maj20m 82d 5h 34m
06 Jul 1984 @ 0901 maj8m 23d 9h 11m
12 Jun 1984 @ 2350 maj~19m 19d 19h 5m
24 May 1984 @ 0445 A69d 5h 45m
15 Mar 1984 @ 2200 A93d 13h 0m
13 Dec 1983 @ 0900 A106d 20h 2m
28 Aug 1983 @ 135865d 18h 33m
23 Jun 1983 @ 192516m 47d 19h 25m
07 May 1983 @ 0000 A20d 6h 3m
16 Apr 1983 @ 165714d 16h 57m
02 Apr 1983 @ 0000 A9d 9h 20m
23 Mar 1983 @ 144010d 14h 40m
13 Mar 1983 @ 0000 A12d 0m
01 Mar 1983 @ 0000 A24d 13h 5m
04 Feb 1983 @ 105515d 16h 55m
19 Jan 1983 @ 1800 ie18d 18h 0m
01 Jan 1983 @ 0000 A24d 4h 0m
07 Dec 1982 @ 2000 A24d 10h 0m
13 Nov 1982 @ 1000 A15d 11h 0m
29 Oct 1982 @ 0000 A19d 4h 0m
09 Oct 1982 @ 2000 A19d 9h 23m
20 Sep 1982 @ 103715m 13d 23h 1m
06 Sep 1982 @ 113633d 2h 33m
04 Aug 1982 @ 0903 maj43d 6h 51m
22 Jun 1982 @ 021213d 18h 22m
08 Jun 1982 @ 07506d 20h 36m
01 Jun 1982 @ 111411d 23h 20m
20 May 1982 @ 1154 maj10d 18h 54m
09 May 1982 @ 17004d 19h 43m
04 May 1982 @ 21176d 9h 17m
28 Apr 1982 @ 1200 A4d 6h 43m
24 Apr 1982 @ 04178d 4h 17m
16 Apr 1982 @ 0000 A26d 0m
21 Mar 1982 @ 0000 A10d 15h 0m
10 Mar 1982 @ 0900 A7d 9h 0m
03 Mar 1982 @ 0000 A9d 5h 0m
21 Feb 1982 @ 1900 A10d 19h 0m
11 Feb 1982 @ 0000 A28d 7h 0m
13 Jan 1982 @ 1700 A2y 210d 2h 34m
18 Jun 1979 @ 1526299d 7h 23m
23 Aug 1978 @ 0803 maj147d 20h 33m
28 Mar 1978 @ 10309y 216d 9h 20m
26 Aug 1968 @ 021083d 19h 5m
03 Jun 1968 @ 070541d 17h 27m
22 Apr 1968 @ 1238311d 6h 58m
16 Jun 1967 @ 064028d 6h 40m
19 May 1967 @ 0000 A11d 0m
08 May 1967 @ 0000 A11d 23h 0m
26 Apr 1967 @ 0000 A37d 0m
20 Mar 1967 @ 0000 ?144d 2h 10m
26 Oct 1966 @ 225077d 3h 14m
10 Aug 1966 @ 193652d 8h 54m
19 Jun 1966 @ 104289d 9h 42m
22 Mar 1966 @ 000017d 6h 0m
04 Mar 1966 @ 1800 A27d 2h 39m
05 Feb 1966 @ 152177d 15h 21m
20 Nov 1965 @ 000069d 3h 11m
11 Sep 1965 @ 2149 ns13d 21h 34m

Interval Statistics

Interval Count100
Min4d 6h 43m
Max9y 216d 9h 20m
Mean194d 8h 45m
Median19d 14h 14m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
10718 04 Nov 2018 @ 1042 --- MAB Light splashes seen, and inferred by steam seen later in Back Basin, but nothing is clearing the immediate vent areas. Snow in both runoff channels - trough full of sands and gravels, ...and slushy water. Cistern in good overflow, muddy pool full and surrounded by white snow.
10694 31 Oct 2018 @ 0828 31 Oct 2018 @ 1400 Tom C. Fickle B. went while I was en route. Saw the column from Gibbon meadows @ 828. Screw it - I'm counting it as water. (Also saw some spikes from Elk Park, the parking rink, and Emerald.) So 12 this year: 1 steam, 1 water/steam, 10 water, 8 from start. No runoff seen anywhere other than E. and W. main channels. Still in steam at 1400. No weirdness up to that time. So much ice on the car cover that I've got it thawing in the tub. The larger (6-12') trees N. of SB were so ice laden when I left, they were bent over 90 degrees.
10689 30 Oct 2018 @ 1900 30 Oct 2018 @ 2000 steve I stopped for one more look, mostly in the dark. I heard 4 good minors, they appeared to start with the north vent tall and not quite vertical. South joined in 5-10 seconds later 10-20+ feet with loud run off. Part of me still thinks I was a fool to leave, but the wise words of Bill Warnock gave me strength to get some sleep and come back in the morning.
10690 30 Oct 2018 @ 0830 30 Oct 2018 @ 1730 Tom C. Saw a chipmunk and two ravens. N. Vent seems ready to go. Tall, sustained and frequently vertical. S. Vent seems to be lagging [seldom vertical, poor runoff from good minors] but improved during the day. When S. Vent did chime in, it usually resulted in Whoo-hoo or H-S level minors; some w/ good runoff, some without, but seldom back-to-back and usually brief. Trough dredged. Overall, slightly ahead of where I thought it would be. BWTFDIK?
10688 29 Oct 2018 @ 1450 29 Oct 2018 @ 1626 udo Trough is 95% dredged. Rumbling nicely. Some concerted minors. Nothing vertical or voluminous during my brief stay.
10685 29 Oct 2018 @ 0820 --- iflykc10s Quietly steaming, hard to see through the snow. Can hear some splashing but no major water in the runoff channel. Boardwalk very dangerous.
10674 28 Oct 2018 @ 1700 --- MAB Morning 6 minute stop had one solo angled NV about 30' followed by a fairly beefy SV to 10', then again with North not as tall. I thought they were alternating a bit until I saw single skinny NV jets with no S. Later concerted action was 30' North and 10' South. At 945 the trough was full of sands and gravels. At my 1700 walk by the trough looked a little cleaner - away from the wall about 1.5 inches, but still quite full. Some of the finer materials were washed away from the wall leaving only the gravels, but it's still heavy sand near the bridge. While I watched several red bb's and red peas came bounding downhill to join their buddies in the trough - so that could explain the larger materials being there. Didn't stop at the platform on the way out but did see a 20' NV and not much from S. Cistern had a gentle boil, hard to see in the a.m., but I wouldn't even call it moderate.
10673 28 Oct 2018 @ 1530 --- iflykc10s Observation from 13:00 to 15:30. Cistern overflowing, Strong minors with lots of water. Most jets were angled between 50' and 100' about every 3 - 5 minutes. Have videos will post later tonight.
10662 24 Oct 2018 @ 1500 24 Oct 2018 @ 1601 harpjane Gentle puffs of steam. We could not see any water in Cistern. I would say it was fully drainer. I don't know how to edit my observation of the eruption but after reconsidering I would say the water phase was more like 45 minutes, not an hour. I still see that giant wall of water every time I close my eyes!
10659 24 Oct 2018 @ 0930 24 Oct 2018 @ 1330 Tom C. Both vents jetting constant water from 0930 through 1200. N, from 15-80', S. from 10-40'. At no time did either vent pause. Just before noon there was a phase shift. Both vents went to ~50% steam, and water height diminished. By 1230 both vents were ~75% steam. By 1330 mostly steam with a water component to 3-12' from both vents. I'd guess Cistern was 4-5' from empty when I left (water at bottom of SE alcove).
10657 22 Oct 2018 @ 1855 22 Oct 2018 @ 2000 RLJones Minors continued at same frequency between 1855 and 2000. None were as large as we observed earlier in the day as reported by Kitt
10656 22 Oct 2018 @ 1855 --- Kitt B No Steamboat eruption as of 1855. This afternoon we had more vertical from North Vent . South Vent was much stronger this afternoon. There were several woohoos with the ones at 1517 and 1623 showing great promise. From 1215 to 1220, I heard a new sound from Steamboat. It sounded like "thrumming" or a low toned rumble sound like a rumble strip, but definitely from Steamboat.
10654 21 Oct 2018 @ 2100 21 Oct 2018 @ 2300 harpjane Beautiful moonlit night but no eruption.
10653 21 Oct 2018 @ 1825 21 Oct 2018 @ 2000 RLJones The minors became more frequent starting at about 1900. Higher than we observed earlier today. They still are not vertical
10652 21 Oct 2018 @ 1825 --- Kitt B No Steamboat eruption yet. We had a couple Concerted with vertical between 1200 and 1300 followed by a lengthy quiet time with little activity. Trough is partially dredged due to babbling Brooks with 3 raging rivers. Cistern is full and overflowing with a boil that varied from little to most of the pool. Emerald is clear and overflowing.
10651 21 Oct 2018 @ 0900 21 Oct 2018 @ 1600 Tom C. Said to look better than yesterday. Some vertical elements in S, Vent early. First meek vertical in N. about 1245. Good minor push from 1300-1330 with a couple of Whoo-hoos. That took the trough from being about 1/4 dredged to 1/2 dredged. Nothing of note until a sustained but weak vertical minor about 1500, followed by some Billing 10 min. later. Then nothing before I left. Trough still 1/2 dredged at 1600. Cistern was witnessed several times to have wide area of boiling (3 vent) to 4-6" which disturbed nearly the entire pool. And was once reported to be boiling but from a fairly calm pool. More bubblers have reactivated in the W. runoff channel below the middle obs. deck. Eventually putting water all the way to the bridge.
10637 20 Oct 2018 @ 1740 --- MAB Trough is still full of gravels and sands, a little less of the finer silt than yesterday
10638 20 Oct 2018 @ 1040 20 Oct 2018 @ 1740 MAB I stopped by post-hike to see who was watching what. Bob Jones reports minors and South V flows more frequent after 1400 today. North V 30'-40', South V 20'. Bursts not quite vertical yet.
10624 19 Oct 2018 @ 1241 --- MAB North V angled burst seen - visitor had been there 30m and that was the first activity she had seen. Trough is full of gravels, sand and silt.
10613 15 Oct 2018 @ 1845 15 Oct 2018 @ 1945 bburrus After seeing that steamboat went off this morning went to go check it out for the last time this year. I leave Yellowstone in a few days it's been a fun summer. Getting to see steamboat was the highlight while working at the Canyon Lodge Gift shop. When me and Jon arrived NV was is a mixed water/steam phase and SV was all steam and stayed that way until we left. Cistern spring was down about 6-10". Some water coming down the NV channel. It was fun to meet and talk with all the geyser gazers this year.
10609 14 Oct 2018 @ 1630 14 Oct 2018 @ 1718 Suzanne One strong vertical minor from North Vent to the height of the trees at 16:37 that produced noisy babbling brook runoff, but it was not sustained. Following 15 minutes had decent minors with 1 follow up vertical from North Vent at 16:50, not as strong. Activity decreased afterwards. Small vertical surges from North Vent as I was leaving at 17:18 (sucker surges?). It was the best period of activity I had seen all day. Hopefully bodes well for tomorrow (and not in the dark overnight).
10608 14 Oct 2018 @ 0830 14 Oct 2018 @ 1600 Tom C. Meh. Poor visibility. Improved during the day. Similar to last Sunday, but with more from N. (mostly angled) and seemingly less from S. Trough was mostly dredged after a decent minor around 930. Had accumulated more debris by 1600. At best 2 Micah 5's during observation period. With maybe 2 more 4micahs. Some decent minors with poor runoff. Suzanne called (thank you Suzanne) a minor with good N. vertical as I was driving past Elk Park. So, at least it has learned a new trick to go along with the only other trick it knew (good concerted vertical minor with good runoff whenever anyone packed up to leave). Yay?
10602 13 Oct 2018 @ 0800 13 Oct 2018 @ 1030 Suzanne Majority of North and South Vent minors were angled and not large. Trench was only partially dredged. Small vertical minors seen from North Vent at 846, 907, 927, and 929. 927 was weak, 929 was sustained. They produced babbling brook runoff.
10595 08 Oct 2018 @ 1700 --- Tom C. No water has returned yet. Still in roaring, guttural steam phase.
10592 08 Oct 2018 @ 1440 08 Oct 2018 @ 1559 udo Audible shift in steam phase may be the beginning of a shift to mixed phase. Repeated at 1523. Longer sputtering (motorboating?) started at 1547 and again about 1557. More water appears to be entering steam plume with each change. Also raining heavier in whichever direction wind is blowing. Sounds like a higher pitched sputtering (motorboating?) than the low rumble. These shifts also displayed a rooster tail of water centered in the steam that grew in size with each one. Had to leave around 1600 but my guess is the mixed phase was still hours away by then.
10585 07 Oct 2018 @ 0830 07 Oct 2018 @ 1800 Tom C. Trough dredged. Medium minors with medium runoff. Never tried to erupt. Saw 2 decent verticals out of N. Vent, might have heard two others. Never saw much of S., Vent due to N. wind.
10576 06 Oct 2018 @ 0915 06 Oct 2018 @ 1800 dfriz No eruption as of 1800. NV and SV had what appeared to be strong concerted minors most of the afternoon. There seemed to be a lot of energy. I would not be surprised to learn that Steamboat erupts overnight tonight.
10567 05 Oct 2018 @ 1257 05 Oct 2018 @ 1320 bbev Both vents actively putting up water. SV 5-10' but no runoff. NV 15-20' jetting every 2-3 min. Some concerted play. SV runoff just a trickle, and trough is still empty of gravel. Good-bye buddy, hope to see you again next Spring. Go Steamboat!!
10566 05 Oct 2018 @ 0808 05 Oct 2018 @ 0811 bbev 2" of snow! Very little runoff if any from SV. Some jetting from both vents.
10556 04 Oct 2018 @ 1259 04 Oct 2018 @ 1314 bbev Some deep huffing from both vents, 1312 light splash from NV no water seen from SV. Trough remains empty of any gravel as SV is not putting out any water yet. CS is overflowing with moderate to light boil and has cleared to a pale blue
10539 03 Oct 2018 @ 1302 --- cb platform quiet and dry with gentle billows of steam. Cistern Spring is not at overflow level. 12+" Below overflow and is a muddy, greenish color with a 2 vent boil. 1740 Cistern Spring is in overflow on the west end toward Corporal. This is my last post for Steamboat 2018 :(
10529 02 Oct 2018 @ 1250 02 Oct 2018 @ 1305 bbev SB quiet and steamy. No water visible in Cistern but can hear water and very steamy. Trough is mostly empty with fine silt deposited on bridge side.
10520 01 Oct 2018 @ 1923 --- bbev Quiet huffing from NV, no water in either vent , SV runoff dry. Cistern drained, no sight or sound of any water.
10513 01 Oct 2018 @ 1019 01 Oct 2018 @ 1046 bbev Both vents throwing continuous water, NV 10-80+', SV 10-30', clean and no rocks. Boardwalk to Cistern closed due to icy conditions. Cistern drained 4-6" below rim of inner tube. Water is cloudy, possibly due to heavy SB runoff that was flowing into it last night. Moderate runoff at bridge (scale2-3?), water milky and trench is free of gravel.
10506 30 Sep 2018 @ 1800 --- SteveO No Steamboat as of 1800
10503 30 Sep 2018 @ 1100 --- Graham Still having good minors but no eruption. Rocks moved in runoff channel indicate good minors overnight too.
10502 29 Sep 2018 @ 1630 29 Sep 2018 @ 2130 hurleyintjl Nice strong minors, some vertical play and heavy runoff, runoff at bridge is fully dredged. No eruption as of 2330
10501 29 Sep 2018 @ 1950 --- Graham Strong minors continued into darkness. Nice booming and rumbling noises. Could erupt any time ..... or not.
10500 29 Sep 2018 @ 1930 --- SteveO No Steamboat as of 1930.
10499 29 Sep 2018 @ 0950 29 Sep 2018 @ 1630 Tara Arrived at 1230 to reports of strong NV vertical minors, trough was mostly dredged by a good push at 0950. There was another push at 1335-1350, trough completely dredged. Activity waned after that, heavy runoff at 1610.
10497 28 Sep 2018 @ 1233 28 Sep 2018 @ 1444 bbev Both vents active. Sv putting out steady runoff and 15-20' minors, NV 25-30'. 1242 25-30' Nv with brief vertical. Trench mostly full and runoff still rolling rocks with strong SV minors. 1304 concerted vertical with NV follow up 20+' and mid range SV runoff. Cistern Springs overflowing with strong boil. 1350 concerted with NV vertical, no follow up, light SV runoff. Last hour less than 20% concerted play. NV=SV solo play. 1406 concerted NV vertical, no follow up and little SV runoff. Ranger talk had little influence.
10491 28 Sep 2018 @ 0805 --- bbev SV runoff wet, 25-30 jet out of NV as I was leaving.
10483 27 Sep 2018 @ 1700 27 Sep 2018 @ 1737 cb Platform is basicly quiet and runoff channels are dry dry DRY! Three NV 6 -8' wispy, angled splashes in 1/2 hour I observed. 2 wispy sprinkles from SV. Cistern in overflow.
10482 27 Sep 2018 @ 0925 --- cb Steamboat platform is gently huffing and mostly dry. No water seen from either vent. SV runoff channel is damp extending 10' below its vent. Cistern Spring is in overflow with a trickle into the muddy pool.
10472 26 Sep 2018 @ 1832 --- bbev Still quiet, no change from this morning. Cistern Springs is 4-6" below rim of inner tube, maybe 4.5-5' below overflow.
10471 26 Sep 2018 @ 1153 --- bbev Steaming quietly. Cistern Spring is at a roiling boil 5-5.5' below rim of inner tube.
10450 25 Sep 2018 @ 1830 --- cb Platform is quiet. Cistern Spring has no visible water but I can hear a boil and splashing deep in the crater. a bit steamy too.
10447 25 Sep 2018 @ 1207 25 Sep 2018 @ 1213 bbev Trench is mostly full. SB quietly puffing steam from both vents. Cistern Spring is empty and quiet, no sound or sight of water, very little, if any steam.
10428 25 Sep 2018 @ 0958 --- cb steamboat platform is quiet and gently huffing. Cistern is empty with a small amount of steam coming from deep within the crater. (water not visible) Trough is full of silt and small pebbles.
10417 24 Sep 2018 @ 1325 24 Sep 2018 @ 1524 mwolf ranger laura reported steamboat re-entering pure steam phase around 1330. I arrived at 1350 for my last steamboat talk of the season and as soon as I began talking, it re-entered a strong water phase with over 100 ft. from the north vent and continuous water from the south vent. I left at 1515 and it was still going strong, no run off though. more later. cistern may have paused its drain.
10403 24 Sep 2018 @ 0900 24 Sep 2018 @ 1154 mwolf At 9 AM, was in pretty mild steam phase, geyser icicles in the trees. I returned at 10:00 AM after hearing sound increasing from the museum area, and the north vent was blasting water (with some mud) with max heights of at least 150 ft. with fluctuating powerful steam out of the south vent. It was similar to the crazy fluctuating bursts during the water phase of the last eruption. This continued for at least half an hour. Upon returning at 11:30, the north vent was in steady continuous water above 100 ft. with mild steam from the south vent. Quite a show. "Steam phase" seems to be a misnomer. Will continue to monitor as much as possible.
10401 24 Sep 2018 @ 0530 --- bbev Thought I heard SB from trailer in Norris Gov area, but was unsure until radio call at 0550.
10396 23 Sep 2018 @ 1930 --- Graham A few more vertical minors in the afternoon but no great improvement. since the earlier report. Gravel has been cleared from the trough. so more water is flowing. Will try again tomorrow.
10393 23 Sep 2018 @ 1030 23 Sep 2018 @ 1335 Tara Increasingly strong minors and audible rumbling building to multiple concerted minors with tall vertical play from North Vent and heavy discharge from South that moved a lot of gravel in the trough. NV vertical at 1323 (woo), 1327 and 1332 (woohoo).
10349 22 Sep 2018 @ 0900 22 Sep 2018 @ 1800 Polly Slow but mostly steady improvement throughout the day. 1625-1634 had a nice series of minors that had 2 short vertical North Vent bursts. By the time I left North Vent had picked up more volume & height than it had earlier in the day. Also, rumbles seemed to be a bit louder.
10347 22 Sep 2018 @ 1745 --- Kitt B no eruption yet and no real vertical in North yet, just spits going vertical.
10344 22 Sep 2018 @ 1500 --- Graham South Vent started having some vertical surges around 1200. No vertical surging in North Vent and no decent minors seen yet. Trough still has a lot of gravel in it.
10400 22 Sep 2018 @ 0838 --- bbev Standing room only on both observation decks. Trough filled overnight, to its fullest level, and has not yet begun to dredge any of the gravel out.
10333 21 Sep 2018 @ 1901 21 Sep 2018 @ 1924 cb Water has returned to the platform. NV angled jetting 15+'. SV 10'. Some concerted. Trough is the same as mornings observation. There is a steady flow of clear water coming down to and beyond the bridge. Cistern Spring has better overflow from this mornings observation.
10320 21 Sep 2018 @ 0742 21 Sep 2018 @ 0805 bbev Soft rumbling and wispy jetting from NV, some splashing from SV 5' and runoff has trickle of water. 0748 20' wispy jet from NV, some small splashes from SV. 0754 more small jetting from both vents. Trench remains empty from previous eruption, with clear trickle just beginning to fill it with water. Runoff below bridge is dry. Cistern overflowing, but only barely into muddy pool.
10311 20 Sep 2018 @ 1700 20 Sep 2018 @ 1758 cb platform is dry. Very wispy NV splashes maybe 4 - 7' tall @ 1711 and 1714, 1736, 1740, 1745, 1748, 1756 otherwise both NV and SV are just gently steaming. 1 SV wispy 2' splash at 1749. All runoff channels are dry. Cistern Spring is overflowing but not into the muddy pool. There is a 3 vent boil in the center and it's blue in color.
10306 20 Sep 2018 @ 0835 --- cb Water has returned to Steamboat's platform. 0839 NV angled 5' splash. 0841 NV angled splash. 0844 NV 8' angled splash.0852, 0855 NV splash. No splashes from SV observed. channels are wet but it did rain this morning. no water running down channel ar the bridge.
10304 19 Sep 2018 @ 1800 --- cb Steamboat platform is quiet. Just soft billows of steam coming from all vents. No water. Platform and runoff channels are dry. Cistern Spring is approximately 2.5' below overflow and is milky blue with a 2' diameter boil.
10308 19 Sep 2018 @ 1203 --- bbev Still quietly steaming. Cistern Springs up from this morning, 3-3.5" below rim of inner tube, vigorously boiling, water appears milky.
10296 19 Sep 2018 @ 0800 --- bbev Quietly steaming. Cistern Springs just refilling, grey, boiling water can just be seen from lower boardwalk, 5-6' below rim of inner "tube".
10290 18 Sep 2018 @ 1840 --- cb SB is quietly steaming and the platform is dry. no water in the system. Cistern Spring is still empty. No sign of water. (61°) No audible bubbling sounds, no steam, nada. . .
10281 18 Sep 2018 @ 0942 --- cb platform is quiet, gently huffing with a narrow band of dampness on SV runoff channel. No water in the system < 24 hours post eruption. Cistern Spring has drained. no water or steam visible (32°) Trough is mostly dredged with a small amount of pebbles and silt covering the drainage
10266 16 Sep 2018 @ 1255 16 Sep 2018 @ 1938 udo Woo-hoo! 1316 Woo. 1324 Woo. 1425 Woo-flippin'-hoo! 1717 Woo-hoo. 1720 Woo-hoo. 1723 Woo-hoo. 1906 Marking. no eruption yet.
10265 16 Sep 2018 @ 0800 16 Sep 2018 @ 1116 udo Emerald is clear, overflowing. Its south bubbler is barely blipping. Cistern is clear, overflowing into muddy pit. Runoff is clear. Gravel pit is nearly dredged. A few good minors should clear it. 0823 first concerted vertical with good runoff = Woo. Almost woo-hoo. ET not covered. 0942 Woo. 0947 Woo. 1022 Woo. 1042 Woo. 1044 Woo. 1057 Woo.
10254 16 Sep 2018 @ 0900 16 Sep 2018 @ 0925 bbev Increased activity from last evening. NV having angled jetting 25'+, saw 2 small vertical splashes. SV 10 - 15' with continuous light outflow that has mostly filled the trench. Some concerted play. Cistern Springs is overflowing in all directions.
10219 15 Sep 2018 @ 1755 15 Sep 2018 @ 1830 bbev SV runoff wet to bridge and beyond. Trough is mostly empty and wet. Both vents active, NV 20-25', and SV 10+', some concerted play. Trickle of water starting down shoulder from behind SV. 1824 small vert splash from NV after some strong jetting. 1827 more vertical splashing from solo NV
10210 15 Sep 2018 @ 1120 --- cb Water is returning to the platform. SV runoff has a thin area of dampness just below the vent but water has not reached the bridge. NV had a few 5 - 10' splashes one at 1128 that was CNV with a 3' V splash. Cistern Spring is overflowing with a 3' diameter boil and is a milky blue color. No water at the bridge. Emerald Spring is clear, calm and a beautiful turquoise blue color with patches of green on the rocks within the pool.
10213 15 Sep 2018 @ 0735 15 Sep 2018 @ 0746 bbev Wispy jetting from both vents. 0742 20' jet from NV. NV continued with 10-15' jetting and occasional splash from SV. Trickle of water in SV runoff.
10202 14 Sep 2018 @ 1332 14 Sep 2018 @ 1402 bbev Still quietly steaming. Cistern Springs overflowing from all sides, including into muddy pool. 1341 wispy spritz from NV, then quiet. 1350 Another very wispy NV.
10193 14 Sep 2018 @ 0935 --- cb SB platform is quiet and dry. water has not returned to the system yet. Cistern Spring has not reached overflow yet. water level is about 6 - 8" below overflow. CS pool is very steamy this morning. (40°) I can't hear or see any boil.
10200 14 Sep 2018 @ 0755 14 Sep 2018 @ 0811 bbev Steamy, occasional soft huffing from both vents. No water seen, which would be expected with Cistern Springs still below overflow. Cistern Springs 12-14" below overflow, light boil in middle of clear pool.
10185 13 Sep 2018 @ 1825 --- cb SB is still quiet and dry. Cistern Spring is filling. Water level is about 5' below the inner tube. It has a vigorous roiling boil and is a muddy gray color.
10178 13 Sep 2018 @ 1145 --- cb SB is quiet and gently steaming. Platform and channels are dry. Trough is mostly empty, bottom is covered in silt, no gravel. Cistern Spring has drained and is empty with just a thin wisp of steam. Emerald is just below overflow, is clear, quiet and a beautiful turquoise blue color
10170 12 Sep 2018 @ 1828 12 Sep 2018 @ 1844 bbev Continuous jetting from both vents, NV 5-20' and SV 5-10'. Continued for the 15 min I was there. Light, milky runoff in SV channel. Trench has fine silt but has not filled.
10168 12 Sep 2018 @ 1210 12 Sep 2018 @ 1217 bbev Forceful steam from NV, and some water in its channel. SV steaming and runoff dry, trough is mostly empty. Report from my coworker is that at 0845A, went from steam to water from SV and water and dirt from NV.
10164 12 Sep 2018 @ 0830 12 Sep 2018 @ 1200 bburrus At 909 steamboat had a pause, the steam dropped and then restarted with water from the north vent for a few minutes. At 1124 water started coming out of north vent again to about tree line. It also had a brief pause during this and shot up some rocks as well. Around 1130 went back to mix water and steam from North vent. Cistern spring was a few inches from the top when I got there and when I left it had drained about 12-14".
10159 11 Sep 2018 @ 1806 11 Sep 2018 @ 2023 udo WooHoo at 1806, 1830, 1838, 1935 No eruption yet.
10155 11 Sep 2018 @ 1850 11 Sep 2018 @ 2005 bbev Heard calls of 3 consecutive big minors as we drove into parking lot. Reported that trough filled this afternoon and was mostly clear when I went down to bridge. Observed several strong concerted, vertical minors, nothing sustained for more than a few seconds. Cistern was still overflowing heavily, apparently unaffected by the strong minors, which has been the case in past 2 eruptions.
10157 11 Sep 2018 @ 0815 11 Sep 2018 @ 0915 Micah Kipple Spent an hour down at steerage. There is still a lot of silt in the trench but it is partially dredged. On a Micah 1-10 scale overflow averaged about 1.5. Minors are occurring but not very voluminous. North and South did throw in some vertical splashes several times during concerteds but nothing that got me excited.
10141 10 Sep 2018 @ 1819 10 Sep 2018 @ 1836 bbev Both vents active and jetting every other minute or so, NV 5-15' and SV 5+'. SV runoff wet at top. Cistern Springs continues heavy overflow, gently boiling in center of somewhat milky, blue pool. Not a trickle of water at bridge, trough is empty of gravel or sand.
10130 10 Sep 2018 @ 0806 10 Sep 2018 @ 0830 bbev Soft rumbling with spritz of water from SV as I walked up, runoff dry. 0806 same spritz from NV. Cistern Springs overflowing from all sides. Trough is mostly empty, with only a fine silt covering the bottom. 0818 light splash from NV. Appears that water just coming back into system. 0821 lgt splash from SV. Still mostly quiet and steamy. 0826 10' jet from NV. 0830 lgt splash NV.
10125 09 Sep 2018 @ 0810 --- cb Quietly huffing steam, no water. Emerald Spring is in overflow, clear and calm. Cistern Spring is refilling slowly and is down 12" below the inner tube. (approximately 6' from overflow)
10108 08 Sep 2018 @ 1312 --- bbev Still quietly steaming, no water. Cistern Spring is empty, no sight or sound of water....really.
10114 08 Sep 2018 @ 0811 --- WillBoekel emerald spring is In overflow, clear, calm and blue/green in color. SB is mostly quiet with only a occasional huff from NV. Cistern Spring has completely drained WHICH IS TO BE EXPECTED AFTER SB QUITS! Just a faint steam from Cistern. Trough is empty of debris and did not refill.
10105 07 Sep 2018 @ 1916 07 Sep 2018 @ 1941 bbev Surprisingly quiet, yet forceful, steam from both vents, with beautiful rainbow, light precipitation on both decks. Cistern Springs down 14-16" below overflow, clear with occasional bubbles in center. Some runoff still in NV channel from the rain. SV very muddy grey, steady runoff at bridge, unable to tell how full (if at all) trough is due to very milky runoff.
10577 07 Sep 2018 @ 0848 --- Polly Minor with brief earth rattling rumble!
10072 06 Sep 2018 @ 0730 06 Sep 2018 @ 1839 cb We've had 12+ nice NVV events throughout the day. At 1800 the deep rumbling became louder and was accompanied with some nice concerted vertical from both vents. Cistern is overflowing and Emerald has reached overflow again and is turning a beautiful shade of turquoise blue! Just for the record.
10067 06 Sep 2018 @ 1730 --- novakg No eruption yet.
10048 05 Sep 2018 @ 1835 05 Sep 2018 @ 1936 bbev Nice jetting from both vents, some occasional concerted vertical, NV 25+' and SV 15+' with SV runoff cresting middle rock on one strong SV and rolling as much gravel in, as it might take out of the trough, which is mostly full. Overall, only change was SV more active, with increased runoff, and slightly more concerted play.
10047 05 Sep 2018 @ 1124 05 Sep 2018 @ 1223 bbev NV 20-25' SV 10-15', 1201 Nv 25+ with vertical, nothing out of SV. 1205 another nice NV 25'+ with vertical, 5' SV. 1209 10-15' SV, no runoff. 1211 concerted with 20+ NV vert and SV jetting 10', still very little if any runoff. 1221 another NV 20+' with vertical. SV not as active, with very little runoff. Trickle of water at and beyond bridge.
10049 05 Sep 2018 @ 1100 05 Sep 2018 @ 1200 BillJ To add to bbev's note: in this hour, I counted 99 NV minors/splashes, 18 from SV, 16 more or less concerted. Of those, 3 or 4 were moderate and the others weak. No "Beverly OMG" events or even close.
10035 04 Sep 2018 @ 1938 04 Sep 2018 @ 2010 cb Steamboat is starting to Splash. NV 1941 nice small angled jet. 1942 wispy jet from NV. 1946 5+' NV Splash. 1947 wispy NV jet. 1950 wispy NV splash. 1952 5+' splash X 2. 1953 NV splash. 1955 NV wispy splash. 1957 NV 10' splash. 1958 NICE NV 10 - 15' jetting lasting about 20s. 2001 NV wispy splash. Next splash was at 2009 NV 5' splash. Lots of deep grumbling and gurgling accompanied with huffing from NV. SV is steamy and the splash zone is damp but no water observed from it during this time frame. Emerald Spring is the same as this morning. Cistern Spring (much like this morning) is in heavy overflow with a 2' diameter boil.
10027 04 Sep 2018 @ 1155 --- novakg NV and SV were steam only. Occasional huffing could be heard.
10021 04 Sep 2018 @ 0900 --- cb Steamboat is gently steaming with occasional stronger huffs from both vents. SV runoff channel is damp about 15' from its vent. Water levels in Emerald are slowly rising but still below overflow. New South break out is still putting out water AND there is a new steamy area in the trees closer to the boardwalk! Cistern Is in heavy overflow in all directions and the muddy pool is WAY high! To steamy to see a boil but I can hear a faint bubbling sound and can see convection waves at the edge of the pool.
9998 03 Sep 2018 @ 0916 --- cb Quietly steaming. All runoff channels are dry. Cistern is Empty. completely drained but steamy with some audible bubbling sounds deep down. (34 degrees this morning) Emerald is up a bit, maybe 3". New thing to the south is only erupting to 2-3" and steamy. Trough is full of a gray, fine silty/sandy mix.
EntrySourceLinkComment
15 Nov 2018 @ 1104 DGInc https://drive.google.com/open?id=1VgWYtQeXOEu2caovQRZ0vDWFxSAII1gS Trace as seen on YNM.
07 Nov 2018 @ 1616 DGInc https://drive.google.com/open?id=1IW-fN5w_JN474jOOzCfgvjIfmGneuD80 Seismic trace of YNM
31 Oct 2018 @ 0822 DGInc https://drive.google.com/open?id=1CAYUHRM5FNCpiZq3lXWMwMNwbXxmpCdG Steamboat trace
31 Oct 2018 @ 0822 EmilyW https://imgur.com/a/2GhlBrH YNM seismograph trace for early part of eruption
23 Oct 2018 @ 1929 udo http://quake.utah.edu/station/heli2/20181023/YNM_SHZ_WY_01-20181023.png I believe that 2 pauses / restarts can be seen on the seismo.
23 Oct 2018 @ 1929 EmilyW https://i.imgur.com/ZcqQaAa.png YNR Trace
23 Oct 2018 @ 1929 EmilyW https://i.imgur.com/EfO5rzr.png YNM trace
15 Oct 2018 @ 1412 DGInc https://drive.google.com/file/d/1A_73hR5xUCU3XXntpDtL_JRVOYkqqUvc/view?usp=drivesdk Seismic trace of YNM
17 Sep 2018 @ 0936 EmilyW https://imgur.com/a/u2lYCc5 YNM seismograph, very weak compared to others
08 Oct 2018 @ 1025 EmilyW https://imgur.com/a/fPv9sct YNR seismograph
08 Oct 2018 @ 1025 EmilyW https://imgur.com/a/jCK1igF Imugr link
08 Oct 2018 @ 1025 DGInc https://www.isthisthingon.org/Yellowstone/archive/2018/10/YNM_SHZ_WY_01-20181008.png Seismic trace of YNM. Note the increase in noise @ 1025 MDT/1625 UTC. Trace is consistent with all other Steamboat traces.
30 Sep 2018 @ 1855 JoeN https://imgur.com/Ob4cP45 Seismograph trace YNM
30 Sep 2018 @ 1855 EmilyW https://imgur.com/a/pBvAdk3 Seismograph trace of YNM for 9/30 SB. Start is at late 1855
24 Sep 2018 @ 0518 udo http://quake.utah.edu/station/heli/YNM.png Norris museum seismo trace
17 Sep 2018 @ 0936 EmilyW https://m.imgur.com/a/r1XSkjw Tantulas creek cfps reading
17 Sep 2018 @ 0925 EmilyW https://m.imgur.com/a/r1XSkjw Tantulas creek discharge.
17 Sep 2018 @ 0925 EmilyW https://imgur.com/a/9ZmzU5P Consistent signal barely above background. If this is SB. It's one of the weakest signals on YNM since June.
01 Sep 2018 @ 2321 EmilyW https://imgur.com/a/tJHmemm YNM for this SB
27 Aug 2018 @ 2130 EmilyW https://imgur.com/a/0g43E5L YNM Seismograph trace shows SB start time at 2112 E maj
Baseline does not exist.


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