Last Known Eruption
13d 56m ago

Latest Eruptions

Eruption DurationInterval
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 A1982 log28d 7h 0m
13 Jan 1982 @ 1700 A
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
29 Aug 1965 @ 001549d 2h 45m
10 Jul 1965 @ 213027d 1h 50m
13 Jun 1965 @ 19409d 10h 12m
04 Jun 1965 @ 09288d 22h 13m
26 May 1965 @ 11157d 15h 50m
18 May 1965 @ 192510d 22h 25m
07 May 1965 @ 2100 A9d 1h 0m
28 Apr 1965 @ 2000 A14d 3h 0m
14 Apr 1965 @ 160010d 16h 0m
04 Apr 1965 @ 0000 A8d 0m
27 Mar 1965 @ 0000 A14d 0m
13 Mar 1965 @ 0000 A12d 16h 0m
28 Feb 1965 @ 0800 A10d 0m

Interval Statistics

Interval Count99
Min4d 6h 43m
Max9y 216d 9h 20m
Mean197d 5h 23m
Median20d 20h 42m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
9742 17 Aug 2018 @ 0957 --- Janet White No eruption yet. Granding from both vents at 0902.
9740 16 Aug 2018 @ 2020 --- Kitt B no eruption as of 2020.
9741 16 Aug 2018 @ 1620 16 Aug 2018 @ 2000 Kitt B We had sustained vertical at 1646, a 1.5 minute sustained vertical at 1735, and 1830 had another vertical but it didn't last as long. I counted 5 other times when North vent had some vertical.
9737 16 Aug 2018 @ 0730 16 Aug 2018 @ 1700 Tom C. 3 hours of logged minors (10-11 (by cb), 11-12 and 1530-1630) yielded nearly identical results: ~50% concerted, ~40% North, ~10% South. Some nice vertical play in South. A little desultory vertical play from North. A little begrudgingly sustained play from both, but rarely at the same time. Several "Whoo"s. I may have missed one or two Whoo-hoos. Never seriously threatened to erupt.
9735 16 Aug 2018 @ 0720 16 Aug 2018 @ 1625 udo No eruption yet. Rugged rubber baby buggy bumpers.
9728 15 Aug 2018 @ 1920 15 Aug 2018 @ 2005 bbev SV continues tall sustained vert with heavy runoff(lol), mostly concerted. Runoff channel whiter than this morning and water remains clear at bridge. Area to far left of mid rock showing signs of whitening and not having a lot of "steerage" experience, I am unsure if this is new runoff area or not. Per Jim's observation from 0600 to 2000: " Lots of strong, concerted minors with very little quiet time. Several concerted vertical from NV lasting only a few seconds. Much improved from yesterday
9724 15 Aug 2018 @ 0845 15 Aug 2018 @ 1245 billwarnock Steamboat having some nice water bursts from both vents quite a few concerted, but not much vertical. There were a few nice vertical shots but not enough to get excited about.
9727 15 Aug 2018 @ 1053 15 Aug 2018 @ 1215 bbev 1053 good concerted vert from both vents, did not last. 1150 Another good vertical from NV lasting only a few seconds, nothing followed.
9721 14 Aug 2018 @ 1910 14 Aug 2018 @ 1940 bbev No NV vertical seen. No real change from my 2hr observation of this morning from 1000 to 1215. SV runoff whiter than this morning.
9719 14 Aug 2018 @ 1820 14 Aug 2018 @ 1930 minissa Only thing to add is that around 1900, both vents had some play with nice volume and vertical-ness again in SV; with improved volume, angle on NV was closer to vertical (roughly 70 degrees). Bill noted some chalky or milky quality to runoff during this period, esp visible where the runoff pools between episodes of babbling brook
9717 14 Aug 2018 @ 0610 14 Aug 2018 @ 1810 JimS Lots of concerted minors but while SV had perhaps 10 or more verticals, North had 3. Only 1 vertical was concerted and all were brief.
9707 13 Aug 2018 @ 1700 13 Aug 2018 @ 2030 jillyjill Vents active for several hours. North definitely vertical and south a couple times. Frequent woohoo moments lasting a few seconds to several minutes. Really thought it might go! Left to grab jackets and grab a bite to eat from our car, intended to stay until dark but a thunderstorm drive us back to our car.
9704 13 Aug 2018 @ 1810 13 Aug 2018 @ 1858 bbev SB still having concerted play 20-25+' from both vents. <40% concerted noted. SV trying to go vertical but nothing close to vertical from NV. Cistern overflow down from this morning.
9701 13 Aug 2018 @ 1345 13 Aug 2018 @ 1433 udo Gravel pit is dredged. Water is clear. Left side is flowing and middle rock gets covered from strong, long SV minors. Concerted minors frequency varies from often to long pauses during lulls. No vertical from NV. Heights are 10-20 feet. Duration good at times. IMO needs increased frequency. Verticalness and deep percussive sounds are missing. Not quite ready but could be any time it wants to.
9702 13 Aug 2018 @ 0715 13 Aug 2018 @ 1420 Barbara Lasseter Lots of water for the 1st 45+min from both N & S vents, concerted. Nearly continuous rushing water down the S channel for that period. Neither vent was vertical. As the AM progressed, S vent developed a more vertical presentation, but not so w/N vent. Lulls were brief, water output impressive. I noted prolonged bursting from both vents with strong vertical output from S vent at 1135, 1218, 1326, and w/angled S vent at 1355. Fun to watch!
9703 13 Aug 2018 @ 0935 13 Aug 2018 @ 1121 bbev SV huge raging river as I walked up. Strong concerted jetting from both vents, NV 20-25', SV 15-20 with substantial runoff. No vertical. Considerable dredging from last night, trough mostly clear of debris even in flat area downstream towards bridge. 0958 runoff around right side of middle rock(5?). Left side trickle and is mostly wet. Water remains clear. 1055 strong concerted minors, NV 25+' and SV 20+' with good runoff. SV trying to get vert and lasting 5-10 sec.
9693 12 Aug 2018 @ 1828 12 Aug 2018 @ 1930 bbev Occasional jetting from both vents, 10-20'. SV runoff steady, clear flow of water that has dredged enough to barely expose bottom. Several pushes were half way over middle rock and left a trickle on the left side. Steamboat sign missing at mid deck! 1914, 1918, 1922, 1926 nice strong concerted minor NV 25-30', SV 20' with nice runoff. No vertical from either vent. Cistern Spring is boiling vigorously and overflowing, filling muddy pool on the left side. Appears clear and blue.
9688 12 Aug 2018 @ 1545 12 Aug 2018 @ 1730 jillyjill A little vertical play out of both North and South vents. Heavy flow during this time. One woo hoo moment at 1722. Cistern spring had constant flow and was higher than last Friday when we were here.
9632 11 Aug 2018 @ 0732 11 Aug 2018 @ 0752 bbev SV 8-10', runoff channel wet, flowing from area above and behind SV. 0734 SV 15-20', NV same. Cistern Springs clear, blue and runoff has filled muddy pool near boardwalk. SV runoff steady light stream, clear, and extending below bridge, gravel in place. Channel is returning to grey/yellow color at bridge. 0748 back to mid deck, NV jetting 20+', SV 15' 0750 SV 25' and sent trickle down runoff. 0751 NV 25'.
9600 10 Aug 2018 @ 1306 10 Aug 2018 @ 1324 bbev SB appears unchanged from this morning, alternating between quiet and soft huffing.1308 SV splash 1312 NV 10-15'. 1320 SV 5 '. 1322 NV 10'. No water in runoff, back of SV wet and returned to yellowish color.
9599 10 Aug 2018 @ 0730 10 Aug 2018 @ 0754 bbev SB becoming a little noisier, huffing from both vents. 0734 wispy water from NV. 0737 SV 10', 0742 10' splash NV and wispy splash from SV. 0748 NV 5'. 0752 NV jetting.
9586 09 Aug 2018 @ 1201 09 Aug 2018 @ 1227 bbev Unchanged, quietly steaming, no water. 1208 small splash from both vents, after soft huffing. NV 5-8'. SV just over ET's head.1222 10' splash from NV.
9537 08 Aug 2018 @ 0729 08 Aug 2018 @ 0742 bbev SB quietly billowing steam from both vents. Steam coming from area behind, above and to the east of SV. SW vent not steaming at all. Cistern Springs appears to be at same level as last night, 16-18" below overflow. Continues to boil. Clear, pale green.
9523 07 Aug 2018 @ 1914 07 Aug 2018 @ 1919 bbev SB no change from this morning, quietly steaming with no water from either vent. Cistern Springs may have risen 1" since this morning, boiling more vigorously, and water appears to be clearing.
9521 07 Aug 2018 @ 1206 07 Aug 2018 @ 1221 bbev SB very quietly steaming from both vents. No water and oddly silent on mid deck. SV runoff dry, brilliant white, above and below bridge, trough full of small gravel and silt. Cistern Springs up maybe 2" from 27 hours ago, green, cloudy, moderate boil (refilling?).
9508 07 Aug 2018 @ 1110 --- Stephen_Gemar Huffing steam with a little force behind it. VERY quiet.
9490 06 Aug 2018 @ 0859 06 Aug 2018 @ 0925 bbev Steady mixed water/steam huffing from NV, mostly steam from SV with steady, very light milky runoff. Trough has mostly filled with small gravel and silt. 0917, wispy NV jetting, 10-15', trickle down NV runoff. No water seen from SV. Cistern Springs is 18-20" below overflow, down another 2-3" from last night. Emerald clear and calm.
9483 05 Aug 2018 @ 2018 05 Aug 2018 @ 2044 bbev NV water/steam mix, activity much less than this morning but still enough for a light rain on mid deck. 2032 SV runoff just cresting left shoulder of middle rock and trough has nearly filled with gravel and silt. NV runoff channel still moderatly flowing same milky water as SV. Cistern Springs 16-18" below overflow, down 2-3" from this morning.
9474 05 Aug 2018 @ 0905 05 Aug 2018 @ 1000 bbev Heavy steam, precipitating heavily on mid deck. SV with consistent, moderate (2-3 scale? Water is just cresting left shoulder of middle rock. Increased flow at 0920 to mid point on middle rock), very milky overflow, but no splashing. NV is mixed water and steam, seen from upper deck, with light milky runoff in its channel. SV runoff channel trough is clear of any debris. Still very white both above and below bridge. 0922 water increased in NV, steady jet 30-60', angled, and vertical, still throwing small rocks. SV steady vertical 20-25' with moderate, steady overflow seen from mid deck. 0938 Increased water in both vents. SV more left and vert than anything, NV near 70-80'. Cistern Springs is 12-14" below overflow and clear enough to make out inner tube. Very quiet, dry small bubbles in middle of pool.
9472 04 Aug 2018 @ 1410 --- udo FYI, Steamboat has a 2-holed vent located SW of the S vent and across from S vent's runoff channel that huffs steam during S vent minors and erupts or sloshes water intermittently sideways but also slightly vertical (a few inches max) during a major. I have been calling it the SW vent but it probably has other nicknames. This vent stopped sloshing water at 1442. Since the transition from water to steam phase in Steamboat's other vents is highly subjective, I propose that the water phase ends when the SW vent stops sloshing water out as it did during all of the eruptions that I witnessed this year.
9535 04 Aug 2018 @ 0600 04 Aug 2018 @ 1410 Tara Kitt Barger reported a tall, sustained, vertical Granding minor at 0603. There were also several large follow-up minors until 0618. Then nothing of note until smaller North vertical minors at 0949 and 1100, the latter of which had very heavy runoff from South Vent. There was a short series of strong minors at 1224, 1226, and 1227, then good runoff at 1346. At 1407 there was a moderately strong flow at the bridge 3 minutes prior to the start of the major eruption, but nothing that suggested it was building.
9460 03 Aug 2018 @ 2120 --- Stephen_Gemar No eruption when we left the parking lot. At 21:20.
9459 03 Aug 2018 @ 2005 03 Aug 2018 @ 2035 Stephen_Gemar A couple of nice concerted minors, but no consistent vertical jetting observed from NV during this time. NV had a couple thicker jets. SV did send a lot of water down the runoff channel at 20:19. No “woo-hoo” minors observed.
9449 03 Aug 2018 @ 1815 --- JimS No eruption as of 1815. Several good minors with Granding and many verticals from North, but they were scattered and did not build
9446 03 Aug 2018 @ 1315 03 Aug 2018 @ 1700 bbev Strong angled jetting from both vents with occasional vertical splashing. 1535 strong, NV vert, sustained (2-3 sec) which was stronger than any event observed by this writer on Monday. No follow up.
9440 03 Aug 2018 @ 0830 03 Aug 2018 @ 1500 cb no steamboat yet. some vertical splashing today. 1 Wooohoo @ 0830. 1 Wooo (HNVV) @ 1207. One brief Granding @ 1304. 1402 NVV that went tall with a vertical splash toward the end. < This is much of the vertical play I observed during the day, tall NV with V splash toward the end. 1 hour tally showed 32 concerted minors out of 58 events, 9 of which had vertical.
9435 03 Aug 2018 @ 0830 --- Kitt B Per Carol, Jim reported seeing one strong minor with 3 to 4 seconds of "Granding".
9434 03 Aug 2018 @ 0538 03 Aug 2018 @ 0702 Kitt B We saw 4 short duration minors that included vertical jetting in North vent. The run off channel has turned very white all the way past the bridge.
9401 02 Aug 2018 @ 1745 --- udo no eruption as of 1744.
9402 02 Aug 2018 @ 1435 02 Aug 2018 @ 1740 udo Several vertical concerted minors with decent overflow. Not one Woo-hoo.
9400 02 Aug 2018 @ 1130 02 Aug 2018 @ 1432 udo At least 8 vertical concerted minors over the past 3 hours show some improvement but not one Woo-hoo so far today.
9406 02 Aug 2018 @ 1120 02 Aug 2018 @ 1222 bbev Congress pool down some from yesterday. Pork chop 3" below overflow. Cistern has light overflow in the back, but very little on both left and right sides. Muddy pool has dried up. SV runoff above the bridge completely white, and spreading below. Steamboat having strong, concerted, angled jetting, with fair runoff during the 40 min i was there. Saw one brief vert out of NV at 1218.
9399 02 Aug 2018 @ 0730 02 Aug 2018 @ 1017 udo Minors are over 90% concerted and pauses between are extremely short when compared against Monday's minors. Runoff has more volume despite no NV verticals so far. First impression is this is very different from what I've seen before, for whatever that's worth.
9393 02 Aug 2018 @ 0930 02 Aug 2018 @ 1000 cb Strong angled, 75% concerted, jetting from both vents. Heavy SV runoff. No vertical. No Steamboat as of 1030.
9398 02 Aug 2018 @ 0807 --- udo Heavy runoff covered middle rock. Water is clear. Pit is dredged to bedrock all the way to the bridge. Only large gravel is left, smaller stuff is washed. Center channel is white sinter over 20 feet downstream from bridge
9371 01 Aug 2018 @ 0800 01 Aug 2018 @ 1500 Tom C. S. Vent improved from yesterday. Nothing vertical observed from N. Vent. Runoff hit 7 on the Micah scale twice.
9368 01 Aug 2018 @ 0600 01 Aug 2018 @ 1200 JimS North a bit stronger than yesterday but no verticals in the 6 hours.
9367 01 Aug 2018 @ 0800 01 Aug 2018 @ 0859 Kitt B 41 of 57 minors were concerted, with 11 of 57 had south jetting and 3 initiated from South vent and 13 from North vent and no vertical jetting from North.
9373 01 Aug 2018 @ 0500 --- Kitt B Had 2 CNJSJ (concerted north jetting south jetting) during this time. One at 0513 and 0537. I stayed until 1000 and saw no more north jetting. Both of these minors had a raging river plus one at 0617.
9348 31 Jul 2018 @ 0820 31 Jul 2018 @ 1620 JimS No eruption as of 1620. Appears to have reset itself with only one brief vertical from North. Activity level down to about that of 3 days ago.
9344 31 Jul 2018 @ 1400 --- Kitt B no eruption as of 1400
9366 31 Jul 2018 @ 1120 31 Jul 2018 @ 1257 Kitt B 57.6% were concerted, 59 total minors, and all non-concerted minors were initiated by the north vent and 10 out of 59 minors included south jetting.
9343 31 Jul 2018 @ 0500 31 Jul 2018 @ 1255 Kitt B Watched Steamboat for over 7.75 hours and saw zero vertical from North vent. Pork Chop is 1 -2 inches below overflow and Emerald Spring is clear, calm, and barely overflowing.
9341 31 Jul 2018 @ 1200 --- cb no eruption as of 1200
9339 31 Jul 2018 @ 0500 31 Jul 2018 @ 0800 jazzknick Apparently more conventional minors, some concerted but little or no vertical from nv. SV has some beer but weaker in strength. Water surges at bridge moderate but there were signs of overnights stronger surges. Relatively weak compared to activity of the last several days. Channel coated with white glaze over last two days but water only slightly milky in color. Porkchop Geyser below overflow.
9337 30 Jul 2018 @ 1830 30 Jul 2018 @ 2030 Tara No eruption as of 2040. Seemed to be in a lull during observation time, no woohoo minors between 1830 and 2030.
9335 30 Jul 2018 @ 1550 --- udo woo-hoo
9334 30 Jul 2018 @ 1538 30 Jul 2018 @ 1542 udo 3 x Woo-hoos
9333 30 Jul 2018 @ 1423 --- udo Woo-hoo
9332 30 Jul 2018 @ 1333 --- udo Holy Shite
9331 30 Jul 2018 @ 1257 --- udo nice series of concerted minors with good runoff, not quite woo-hoo
9330 30 Jul 2018 @ 1246 --- udo Woo-hoo
9329 30 Jul 2018 @ 1228 --- udo Woo-hoo. Note: woo-hoo = concerted sustained heavy minor that obscures E.T. for a minimun of several seconds.
9328 30 Jul 2018 @ 1224 --- udo Holy SHITE
9327 30 Jul 2018 @ 0948 30 Jul 2018 @ 1141 udo Concerted vertical minors with noisy cascading runoff: 0948 NV 40', SV 20', 0953 NV 50' SV 20', 1001 NV 40' SV 25' 1003 NV 45X SV 20', 1015 woo-hoo, 1059 woo-hoo, 1110 possible woo-hoo obscured by steam from NV, 1131 Holy Shit NV silver bullet to 90+ feet concerted sustained, rolled golf ball size rocks down runoff.
9322 29 Jul 2018 @ 2030 --- bbev No eruption as of 2030. Strong NV with occasional vertical splashing. SV runoff noticably whiter than earlier in the afternoon.
9319 29 Jul 2018 @ 0530 29 Jul 2018 @ 1730 Dave from B No eruption as of 1730
9318 29 Jul 2018 @ 1000 29 Jul 2018 @ 1405 Tara No eruption as of 1405. Strong minors at 1007 & 1023 and 1112, 1115, & 1126, then strong push with pairs of tall NV vertical minors with heavy discharge at 1236 & 1238 and 1249 & 1250. Left channel and right side of bottom rock about 3/4 covered.
9317 28 Jul 2018 @ 2326 --- Kitt B no eruption as of 2326
9316 28 Jul 2018 @ 1200 28 Jul 2018 @ 2110 Tara Strong NV vertical minor at 1407 with good runoff, strong push of 5 consecutive minors including one NV vertical from 1724-1728, woohoo NV vertical minor at 1821, occasional NV vertical after that. Became difficult to see during and after hailstorm ar 1930. No eruption as of 2110.
9314 28 Jul 2018 @ 1510 --- udo No eruption as of 1510.
9315 27 Jul 2018 @ 2320 28 Jul 2018 @ 1330 Micah Kipple Improvement over yesterday. North Vent now participating more and occasionally initiating concerted angled minors. Heavy runoff occurring at times although this doesn't always line up with vertical pushes. From 2300-0200 roughly there were relatively frequent, loud, steamy concerted minors although I couldn't tell if they were getting vertical. There was a considerable vertical moderately sustained push around 0820, and then multiple short duration sustained voluminous vertical minors from 1000-1200. Activity waned around 1300. The overflow has also noticeably increased and more bedrock continues to be exposed at the base of the Cascade by the bridge.
9310 27 Jul 2018 @ 1930 --- Kitt B no eruption yet and very little improvement
9311 27 Jul 2018 @ 1920 --- Tara NV increased volume in late afternoon with thicker minors. Increased rumbling and a few pops from NV but no increased vertical and no Granding. SV has not changed, still having sustained vertical minors with runoff over middle rock.
9308 27 Jul 2018 @ 1630 --- giantgeyser 1401 concerted vertical surge, some "granding", not sustained. Second similar surge at 1444. No verticals by 1630.
9307 27 Jul 2018 @ 1313 --- hkoenig No more verticals since 11:13
9305 27 Jul 2018 @ 0730 27 Jul 2018 @ 1130 Micah Kipple Continued periodic good flows down runoff channel, including left side. Middle rock covered multiple times.. Overall the flow looks higher than yesterday morning. The trench has been dredged down to bedrock and silt continues to be removed with each surge. There is a moderate amount of concerted minors with South going vertical frequently and strongly. North remains mostly angled with some vertical thick surges. There were two large minors this morning that rolled golf ball sized rocks down the channel and were sustained for a time. They occurred at 0751 and 1115. The 1115 event was stronger with a large surge of runoff and heavy vertical granding in North.
9302 26 Jul 2018 @ 2000 26 Jul 2018 @ 2140 ypcaribou Regular concerted minors, though not what I would call tall, about every minute with at least 3 "oh my" surges. A full on pause alternated with the play. Occasional angled burst from NV to tree tops (in concert with SV). Nice audible cascade about 2025 and another 20 minutes later. Then several more 6-10 minutes apart. Very rumbly the later it got. Felt upper platform shake under me with a concerted surge about 2130. Made me stay past dark! Nice sunset and moonrise.
9301 26 Jul 2018 @ 2000 --- geysergaze Activity increased considerable. NV had more water volume and more vertical play. SV water discharge was greater and more deep rumbling was heard. These minors while larger and more frequent than during the day did not seem like an eruption was eminent.
9300 26 Jul 2018 @ 1800 --- Kitt B No eruption as of 1800. No more vertical from North during late afternoon.
9298 26 Jul 2018 @ 1340 --- hkoenig No more vertical.
9297 26 Jul 2018 @ 0700 26 Jul 2018 @ 1145 Micah Kipple No Steamboat yet. Good runoff from south vent and some concerted action. One good big vertical minor around 1115 that got everyone on their feet, but didnt progress. Middle rock completely covered twice and half covered multiple times.
9296 25 Jul 2018 @ 1901 25 Jul 2018 @ 2010 bbev NV having 20-25' jetting x4 with 2 very small vertical splashes in 1/2 hour of note taking. 15% weak concerted play, 10 strong SV minors, 15-25', three of which sent heavy babbling brook down runoff. Saw one strong SV surge go half way over center rock in 15 min i was at bridge.Steady runoff has removed some material from trough since this morning. Deep rumbling.
9295 25 Jul 2018 @ 1201 25 Jul 2018 @ 1228 bbev NV jetting 10-15' every 3-5 min. SV had nice vertical 5 sec minor while I was there, as well as some 5-10' jetting. Steady, light overflow that has washed silt from trough and left gravel. Cistern Springs still overflowing.
9291 25 Jul 2018 @ 0620 --- C Daubert SV and NV had fairly regular angled splashes and SV runoff channel had a trickle of water. One SV splash was heavy enough to observe (from the lower platform) small rocks moving down the upper part of the channel. Cistern is unchanged from cb's description last night.
9285 24 Jul 2018 @ 1917 24 Jul 2018 @ 1945 cb No water seen this morning but as of 1920 water has returned to the platform. SV & NV has some occasional angled splashes and SV runoff channel is damp. Cistern Spring is a milky blue color and overflowing in all directions! All overflow catch basins are full.
9284 24 Jul 2018 @ 1145 --- bbev No change from yesterday afternoon report, other than Cistern is overflowing into muddy pool next to boardwalk.
9279 23 Jul 2018 @ 1900 23 Jul 2018 @ 1913 Tara Quiet and gently steaming with occasional weak huffs. No water.
9275 23 Jul 2018 @ 0934 --- cb steamboat is quiet and gently steaming. no water in it or runoff channels. Cistern Spring is up to the edge of the inner tube.
9273 22 Jul 2018 @ 2103 22 Jul 2018 @ 2122 bbev Steamboat quiet and lightly steaming, no water seen from either vent. Trough at bottom of runoff ic completely full of fine sand and silt. Runoff chanal is white. "Elvis" is rockin' in his white Las Vegas outfit and newly coiffed hairdo. NV runoff channel color unchanged. Cistern Springs appears to have drained and is now vigorously boiling, grey and murky, unlike the clear pool of this morning. 4' below rim of inner "tube".
9271 22 Jul 2018 @ 0927 --- bbev Quietly steaming, no water seen, both runoff dry. Cistern Springs nearly drained, clear, no bubling/boiling seen, water barely disable from deck above.
9266 21 Jul 2018 @ 2030 21 Jul 2018 @ 2113 bbev Heavy steam,, huffing out of NV, and SV, not as strong, no water seen in either vent, although steady light stream of milky water at bridge. Trough is not completely full with gravel as in past, but Is mostly full of very fine grayish/ brown silt (silica?), with white borders on the higher, drier areas. That "silt" has also accumulated in several areas downstream from the bridge. Runoff channel appears to be back to original color prior to it turning white approx 9-10 hours before last night's eruption. Cistern Springs is down 20-22" from overflow with occasional bubble in center. Most remarkable is that most of overflow area has turned completely white,
9257 21 Jul 2018 @ 0050 --- Kitt B Spent 1.5 hours enjoying steamphase. Cistern just below overflow.
9255 20 Jul 2018 @ 2045 --- JimS North stronger with verticals. Several strong minors, some with good Granding. No eruption by 2045.
9254 20 Jul 2018 @ 1400 --- udo no Steamboat yet as of 1400 when I left. Today's minors were frequent, many were tall, about 60% concerted with a few vertical heavies. SV solo bursts sent babbling brooks down runoff channel often between ~1100 to 1400.
9252 20 Jul 2018 @ 0803 --- udo Gravel pit has been dredged deeper than Tuesday and Wednesday. More bedrock showing. Left side of runoff channel is very wet at this time.
9245 19 Jul 2018 @ 1920 --- JimS No eruption as of 1920. North vent just cannot seem to go vertical.
9242 18 Jul 2018 @ 1600 18 Jul 2018 @ 2030 cb 1 NV vertical splash @ 1727
9241 18 Jul 2018 @ 1700 --- udo No Steamboat yet as of 1700 when I left.
9238 17 Jul 2018 @ 0645 17 Jul 2018 @ 1930 Suzanne Percent of minors starting from both vents (simultaneous) increased from 48% from 0800 to 1200, to 63% from 1220 to 1700. However, the volume in the North Vent was lacking. Only 2 good vertical surges seen from North Vent: at 0659 and 1344. South Vent had good volume for most of the morning and early afternoon. Activity waned later in the afternoon and evening. From 1605 to 1704 only 40 minors were tallied: 62.5% simultaneous, but only 6 had south jetting and 6 had heavy volume from North.
EntrySourceLinkComment
20 Jul 2018 @ 2237 EmilyW https://imgur.com/fenZFsb Utah Seismograph trace
04 Jun 2018 @ 0904 JSJ https://www.youtube.com/watch?v=yZoDFbO84OE Video compilation of Steamboat Geyser's 9:04 to 9:36 AM major eruption on 4 June 2018. Water phase clips start at time stamp 5:27. Steam phase clips start at time stamp 22:29. Explanatory caption is below video (click on "Show More").
04 Jun 2018 @ 0904 JSJ https://www.flickr.com/photos/jsjgeology/albums/72157670618318878 Photo album of Steamboat Geyser's 9:04 to 9:36 AM major eruption on 4 June 2018 (5 pre-eruption photos, 156 water-phase photos, 54 steam phase photos).
15 Jun 2018 @ 1655 EmilyW https://i.imgur.com/vo8gQz7.png Utah Seismo from 6/15/18
04 May 2018 @ 2315 DGInc https://drive.google.com/file/d/1rHiqMIb9CfD-cAo7vbUn8HbE_gx0Auna/view NPS Steamboat data visualized, together with some comments from me
13 May 2018 @ 0351 DGInc https://drive.google.com/file/d/1Vfeb7Yv4VAZDsYyo5lwtvIvvByMxVELB/view NPS Steamboat data visualized, together with some comments from me
13 May 2018 @ 0351 DGInc https://www.isthisthingon.org/Yellowstone/archive/2018/05/YNM_SHZ_WY_01-20180513.png YNM seismograph
04 May 2018 @ 2315 DGInc https://www.isthisthingon.org/Yellowstone/archive/2018/05/YNM_SHZ_WY_01-20180504.png YNM seismograph
04 May 2018 @ 2315 DGInc https://natwebcaww01.wr.usgs.gov/nwisweb/data/img/USGS.06036940.82336.00065..20180504.20180505..0..gif Spike on Tantalus Creek gauge just after midnight
31 Jul 2013 @ 1930 JSJ https://www.youtube.com/watch?v=hlaa_lgxVrA Video by Micah Kipple of Steamboat's post-eruption steam phase in the morning of 1 August 2013.
31 Jul 2013 @ 1930 JSJ https://www.youtube.com/watch?v=Hx8M6MAhAyo Video of water-phase.
31 Jul 2013 @ 1930 WillBoekel https://www.facebook.com/photo.php?v=557326510991121&set=o.4939307398&type=2&theater videos found by Janet White
31 Jul 2013 @ 1930 WillBoekel https://www.facebook.com/photo.php?v=10151752308974329 videos found by Janet White
Baseline does not exist.


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