Last Known Eruption
5y 290d 7h 46m ago

Latest Eruptions

Eruption DurationInterval
28 Aug 2018 @ 173420m
28 Aug 2018 @ 1714 ie38m
28 Aug 2018 @ 1636 ie18m
28 Aug 2018 @ 1618 ie2h 8m
28 Aug 2018 @ 1410 ie21m
28 Aug 2018 @ 1349 ie65d 1h 22m
24 Jun 2018 @ 12276m 1d 2h 31m
23 Jun 2018 @ 09564m 2d 16h 18m
20 Jun 2018 @ 1738 ie3d 8h 6m
17 Jun 2018 @ 093214d 20h 19m
02 Jun 2018 @ 131327m
02 Jun 2018 @ 12462h 26m
02 Jun 2018 @ 10201h 21m
02 Jun 2018 @ 085922m
02 Jun 2018 @ 083716m
02 Jun 2018 @ 08214d 18h 54m
28 May 2018 @ 13274m
28 May 2018 @ 13233m
28 May 2018 @ 13201d 2h 25m
27 May 2018 @ 1055 ie1d 1h 50m
26 May 2018 @ 09051d 14h 45m
24 May 2018 @ 1820 ie9d 8h 46m
15 May 2018 @ 093430s 1d 19h 50m
13 May 2018 @ 134423h 15m
12 May 2018 @ 142930s 3d 18h 12m
08 May 2018 @ 20171h 13m
08 May 2018 @ 19042m
08 May 2018 @ 19023m
08 May 2018 @ 18596h 21m
08 May 2018 @ 12381m 20s 2m
08 May 2018 @ 123638s 3m
08 May 2018 @ 123334s 2m
08 May 2018 @ 123127s 5m
08 May 2018 @ 12261m 6m
08 May 2018 @ 122010m
08 May 2018 @ 1210 ie2d 2h 41m
06 May 2018 @ 0929 ie11y 252d 23h 55m
29 Aug 2006 @ 09345m 1h 0m
29 Aug 2006 @ 0834~5m 5d 19h 41m
23 Aug 2006 @ 12538y 349d 19h 4m
09 Sep 1997 @ 17495d 8h 35m
04 Sep 1997 @ 09143d 16h 48m
31 Aug 1997 @ 16261d 6h 0m
30 Aug 1997 @ 10261d 20h 24m
28 Aug 1997 @ 14024m 6d 19h 56m
21 Aug 1997 @ 18068h 47m
21 Aug 1997 @ 091916h 52m
20 Aug 1997 @ 162722h 10m
19 Aug 1997 @ 18177h 40m
19 Aug 1997 @ 10378m 14h 52m
18 Aug 1997 @ 1945 A8h 10m
18 Aug 1997 @ 113516h 5m
17 Aug 1997 @ 1930 ie8h 15m
17 Aug 1997 @ 11151d 2h 46m
16 Aug 1997 @ 08294m
16 Aug 1997 @ 082518h 35m
15 Aug 1997 @ 1350>8m 19h 50m
14 Aug 1997 @ 18008m 1d 4h 15m
13 Aug 1997 @ 13458m 1d 18h 50m
11 Aug 1997 @ 1855 ie1d 9h 25m
10 Aug 1997 @ 093020h 43m
09 Aug 1997 @ 12476d 1h 17m
03 Aug 1997 @ 11303m
03 Aug 1997 @ 11276m 1d 1h 39m
02 Aug 1997 @ 0948>8m 15h 43m
01 Aug 1997 @ 18057h 25m
01 Aug 1997 @ 104019h 55m
31 Jul 1997 @ 14455m
31 Jul 1997 @ 1440>7m 1d 42m
30 Jul 1997 @ 13586m 21h 13m
29 Jul 1997 @ 16458m 7h 40m
29 Jul 1997 @ 09058m 21h 15m
28 Jul 1997 @ 11507m 30m
28 Jul 1997 @ 1120>8m 21h 5m
27 Jul 1997 @ 14151d 1h 55m
26 Jul 1997 @ 1220>7m 1d 3h 30m
25 Jul 1997 @ 085023h 45m
24 Jul 1997 @ 09058m 17h 5m
23 Jul 1997 @ 16007h 25m
23 Jul 1997 @ 083517h 25m
22 Jul 1997 @ 151013h 55m
22 Jul 1997 @ 01157m 10h 5m
21 Jul 1997 @ 15107m 4h 25m
21 Jul 1997 @ 10451d 1h 30m
20 Jul 1997 @ 091516h 0m
19 Jul 1997 @ 17151d 5h 15m
18 Jul 1997 @ 12002d 3h 45m
16 Jul 1997 @ 081522h 20m
15 Jul 1997 @ 0955>8m 4m
15 Jul 1997 @ 095110h 13m
14 Jul 1997 @ 23387m 10s 1d 7h 5m
13 Jul 1997 @ 16331d 2h 18m
12 Jul 1997 @ 141514h 36m
11 Jul 1997 @ 23396m 13s 7h 29m
11 Jul 1997 @ 16106+1d 2h 15m
10 Jul 1997 @ 13555m
10 Jul 1997 @ 135020h 28m
09 Jul 1997 @ 17224m 2m
09 Jul 1997 @ 17206-8m7d 23h 40m
01 Jul 1997 @ 17405m 333d 4h 6m

Interval Statistics

Interval Count100
Min2m
Max11y 252d 23h 55m
Mean80d 14h 40m
Median18h 0m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
35060 10 Jun 2024 @ 0845 --- SantaFe108 Water level just within sight, calm.
28887 19 Oct 2023 @ 1742 --- ypcaribou Steaming with audible blurping and splashing in vent
28292 17 Sep 2023 @ 0826 --- SantaFe108 Audibly splashing out-of-sight.
27308 28 Jul 2023 @ 2117 --- SantaFe108 Water level out of sight and audibly splashing.
26429 17 Jun 2023 @ 1543 --- JSJ Gently steaming. No visible water.
25457 15 May 2023 @ 1804 --- ypcaribou Empty as far as can be seen from railing by bookstore. Quietly steaming.
24565 30 Oct 2022 @ 1352 --- ypcaribou Gently steaming & quiet
24519 29 Oct 2022 @ 1855 --- MAB nothing heard walking by last night or tonight
24392 15 Oct 2022 @ 2005 --- MAB Approx time - sloshy gurgly splashy noises heard walking by
23947 20 Sep 2022 @ 1517 --- ypcaribou No water visible but gurgling & splashing audible.
22965 01 Aug 2022 @ 1200 --- cb This past week I've noticed SVS is noisy, gurgling. Today it is a bit more noisy! Sounds like more blooping mud pot sounds with gurgling and steam on a HOT afternoon! 🤔
22394 08 Jul 2022 @ 0858 --- bbev Audible bubbling, which I have only heard just after heavy rainfall. Water is just visible standing on top rail of buck rail fence.
21671 02 Jun 2022 @ 1622 --- bbev Water level has dropped and is no longer visible from the store. Still steamy and quiet.
21645 01 Jun 2022 @ 1611 --- bbev Pool has dropped over a foot since yesterday. Water is still visible from store, steaming and clear, with occasional bubble over the vent.
21616 31 May 2022 @ 0901 --- bbev Noticed that Steamvalve is very high and steaming. Pool is clearly visible and ~18" from where it would be overflowing. Do not see any bubbles on surface. Unsure if it has filled from recent precipitation or not. First day l have been here to observe.
16953 28 Apr 2021 @ 0922 --- MAB from bookstore ~ quiet- no visible water - no steam
14607 12 Jun 2020 @ 0750 --- bbev sound of water in vent.
14614 12 Jun 2020 @ 0600 --- ypcaribou Audible splashing heard in vent but not seen. Walls of crater wet. Similar observation at 0920.
14512 03 Jun 2020 @ 0605 --- ypcaribou Observed at 0610 & 1200: Wet in crater with audible splashing heard. No splashing observable from Bookstore fence.
13393 25 Aug 2019 @ 0612 --- ypcaribou Empty
13281 16 Aug 2019 @ 0934 --- bbev Seeing and hearing water, again after heavy rain/hail storm the night before.
13121 09 Aug 2019 @ 0835 --- bbev Gurgling and sounds of water. Can see water in crater standing on top rail of barricades. First water I have seen all summer.
12854 28 Jul 2019 @ 1040 --- ypcaribou Completely empty crater as seen standing on bottom rung of fence rail by bookstore.
11233 02 May 2019 @ 0934 --- Polly Can hear Steamvalve Spring bubbling.
11012 20 Apr 2019 @ 0914 --- MAB no water visible from bookstore- splashing & thuds heard
9942 30 Aug 2018 @ 0733 --- cb bubbling and steamy way below eye level.
9939 29 Aug 2018 @ 1212 29 Aug 2018 @ 1830 bbev Much less activity than yesterday. No water seen during this period, only steam and sound of rumbling/boiling from deep in crater.
9919 28 Aug 2018 @ 1339 28 Aug 2018 @ 1758 bbev Rumbling and steamy from deep in crater. Wall of crater is wet half way to top. Sounds of splashing heard nearly continually during this period and "eruptions" where noted when splashing continued and was seen within or over top of the crater. Store was not too busy so I was able to keep fairly constant eye on it.
9103 10 Jul 2018 @ 0919 --- udo Gurgling intermittently.
8954 30 Jun 2018 @ 0837 --- bbev Pool has not filled in past 3 days I have been at bookstore. No visible water or mud seen in that time. Continuous sound of bubbling/boiling coming from deep in crater. Has not been a continuous watch throughout the days.
8853 23 Jun 2018 @ 1500 23 Jun 2018 @ 1520 Tara Water level down but still visible from bookstore. Constant boiling and blurping with occasional small bursts to ~6-8 inches.
8815 19 Jun 2018 @ 1523 --- bbev increased boiling, pool has turned muddy.
8814 19 Jun 2018 @ 1312 --- bbev 1' from top of crater, clear water. Some bubbling in left (east), center of pool.
8779 19 Jun 2018 @ 0725 --- cb Steamvalve Spring water is high and fairly clear.
8759 18 Jun 2018 @ 0745 18 Jun 2018 @ 1340 JSJ Watched Steamvalve Spring for 6 hours, with brief side excursions to Back & Porcelain Basins. No eruptions. Water level very slowly rising until late morning. Water level ~stable in late morning and early afternoon. Noticed light bubbling in one area of pool in the early afternoon.
8565 03 Jun 2018 @ 2113 --- Siegmund Audible splashing at depth, but no water visible at the surface.
8078 05 May 2018 @ 1100 --- sfavor pool in woods by library (bathtub?) drained and erupting muddy water
29806 08 Aug 2006 @ 1200 --- research-mab 8/8/2006 - no time noted - Heasler checked Steamvalve and there are no harmful gases. The dieing [sic] vegetation is causing the smell. H2O temp is 92°C, 200°F
29805 07 Aug 2006 @ 1200 --- research-mab 8/7/2006 - no time noted - Steam Valve Geyser 2 small eruptions about 3’ high
30010 25 Sep 1997 @ 1200 --- research-mab 9/25/1997 - no time noted - I noticed some changes... Steam Valve is producing a clear pool first time I have seen it like that.
30009 24 Sep 1997 @ 1200 --- research-mab 9/24/1997 - no time noted - Steamvalve’s pool has cleared
30007 16 Sep 1997 @ 1200 --- research-mab 9/16/1997 - no time noted - Steam Valve last erupted on 9//9. On 9-12-97 at 0830 hrs JJackson had noticed that Steamvalve had returned to a pool. This am I checked it and it remains inactive and has developed a very interesting circular ring of sulfur around the outside of the pool. Probably from the rain washing off the mud.
30006 12 Sep 1997 @ 1200 --- research-mab 9/12/1997 - no time noted - JJ {from YA} reports that Steamvalve now has a pool of water (just as of this a.m.!) It did not have a pool for most of the summer
30288 26 Aug 1993 @ 1200 --- research-mab 8/26/1993 - no time noted - Steamvalve 132° clear, calm, bluish in vent slight overflow
30578 04 Aug 1991 @ 1200 --- research-mab 8/4/91 - no time noted - Steamvalve Geyser shows no eruptive activity
30540 29 Jun 1991 @ 1200 --- research-mab 6/29/91 - no time noted - Still no activity from Steamvalve Geyser, just boiling.
4702 09 Jul 1990 @ 1200 --- research-mab 7/9/1990 - no time noted - Steamvalve Geyser has been remarkable this summer for its lack of activity.
30702 09 Jul 1989 @ 1200 --- research-mab 7/9/1989 - no time noted - Steamvalve no overflow. Water is steaming, no bubbling, water fairly clear.
4693 21 Jun 1988 @ 1800 --- research-mab 6/21/1988 - no times noted - Steamvalve is erupting ~ 4 hr intervals to approx 2 meters high. Muddy water overflowing to trail by Emerald Spring.
30798 16 Jun 1988 @ 1405 --- research-mab 6/16/1988 Steamvalve erupted from approx 1:40 pm until 1:44 pm - Max height of bursts 6-8 ft; initial bursts splashed visitors at fence. Steamvalve threw out approximately one dozen rocks early in its eruption. Water drained to about 1 ft below the runoff channel following the eruption. At 2:05: pH-5 water temp 170ºC [sic]. Water thrown up during the eruption appeared to have the consistency of fairly liquid mud/clay mixture. Erupted material was in the form of both “spouting” and the “blurping” noise commonly associated with mudpots
30878 04 Aug 1987 @ 1200 --- research-mab Aug 4 (1987) - no time noted - Steamvalve hasn’t been erupting since the early disturbance time. No activity last 2 wk at least.
4687 14 Jul 1987 @ 1800 --- research-mab 7/14/1987 Steamvalve Geyser having strong eruptions 2-3x / day (10-12ft)
30912 23 Aug 1986 @ 1200 --- research-mab 8-23-86 - no time noted - Haven’t seen any Steamvalve activity lately.
4853 19 Aug 1985 @ 1800 --- research-mab 8/19/1985 - no times noted - Interesting Notes: Steamvalve seems to erupt when the pool level is near the top of a small rock near the big triangle size rock on the opposite side of the overflow side.
5142 19 Aug 1985 @ 1800 --- research-mab 8/19/1985 Interesting Notes: Steamvalve seems to erupt when the pool level is near the top of a small rock near the big triangle size rock on the opposite side of the overflow side.
5183 19 Aug 1985 @ 1800 --- research-mab 8/19/1985 - no times noted - Summary of Steamvalve Geyser: It seems to erupt every 3 ½ to 4 hours (being the interval). The eruption is preceded by bubbling in the pool. The eruption is very much like a small Equinus [sic] but with mucky water. The height of it goes up to 10-12 feet or so, with the eruption going for 5 or 6 minutes. It takes about 2 minutes to overflow and after the eruption there is a rapid drain of 2/3 of the pool, which takes about 1 ½ minutes. Then the drain is very, very slow if at all. It is very much like a small Equinus. [sic]
30933 03 Jul 1985 @ 1200 --- research-mab July 3 1985 – no time noted - Steamvalve 162ºF with pool ½ filled, water is mud colored, geyser regularly erupts with a thumping sound. Interval is ~ 4 hours. Overflows. Water reaches 10 ft high.
4680 19 Oct 1984 @ 1200 --- research-mab 10/19/1984 - no time noted - Steamvalve Spring has recently erupted as per runoff channel through melted snow. Lee Whittlesey
31001 18 Jul 1984 @ 1200 --- research-mab 7/18/1984 Thermal Observations - no time noted - Steam Valve – 4 hour 17 minute intervals
7611 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 - no time noted - Steamvalve Geyser – Active; apparently only 3-4 times each 24 hrs.
31122 11 Jul 1983 @ 1200 --- research-mab Monday July 11 - no time noted - Also Steamvalve’s runoff diverted back into drain, it was running off into Emerald Spring & muddying the water.
33721 01 Mar 1982 @ 1200 --- research-mab no time - inferred approx date - Hutchinson “Spring Guide to Yellowstone’s Geyser and other thermal features” Revised 3/82 - Recognized as the hottest and most unstable of Yellowstone’s geyser basins, Norris is also one of the most colorful. It is the site of frequent and sometimes violent changes. An old geyser vent near the Norris Museum restrooms re-emerged in February 1981 after almost 35 years of burial. It is now having muddy eruptions several times daily.
31249 20 Feb 1982 @ 1200 --- research-mab February 20 1982 - no time noted - Steam Valve Spring 158° bubbling gently with brown turbid H2O
31219 15 Jan 1982 @ 1200 --- research-mab January 15th, 1982 - no time noted - Steamvalve Spring 166º between eruptions, overflow has again found its way down into Emerald Spring.
31191 14 Jan 1982 @ 1200 --- research-mab January 14th 1982 - no time noted - Steam Valve Spring 166º between eruptions, calm & muddy as usual. Still overflowing with eruption
31606 11 Dec 1981 @ 1200 --- research-mab Dec 11 1981 - no time noted - Steam Valve Spring 150º between eruptions. It is still overflowing but the nifty little culvert that was installed last Spring to divert the water from the side walk diversion that put the runoff into Emerald, is not working anymore.
31579 15 Nov 1981 @ 1645 --- research-mab Nov 15 1981 Steamvalve is overflowing (w/eruptions) & active but by the time I got there to take a temp it was too dark to read the thermometer & I think it was just 4:45!!
31402 05 Jun 1981 @ 1800 --- research-mab Friday June 5 1981 [1800 is generic end of day time] - Steamvalve Springs – while partially drained, water down 20 inches 153ºF
4622 02 Jun 1981 @ 0000 --- research-mab 6/2/1981 Steamvalve Spring – Periodically erupts 2 to 6 feet high with opaque gray white water. Debut of Steamvalve occurred on February 25. Mud was sprayed all over restroom and to the tops of nearby lodgepoles.[NOTE RAH Field Notes appears to state breakout Feb 2-3, see Feb 3 @0000 Note - no further clarification has been found to date]
33720 03 Feb 1981 @ 0000 --- research-mab [RAH field notes 6-30-81] Norris Geyser Basin Measurements Steamvalve Spring: 19 m from restroom. - Dimentions: ~N-S: 4.6m, EW 4.9m - Max heigh 3m - emerged 2-3 Monday 2/81 [NOTE - Logbook source states Feb 25 as the breakout. See June 2 Note]
33722 12 Apr 1973 @ 1200 --- research-mab 04/12/1973 no time noted - Steamvalve Spring Not Found [09/09/1966 logbook re road removal: Closing Museum for the season. Old parking pavement is gone. Road south of Museum is gone or torn up, half of pavement down to old Junction has been macerated for removal] [Hutchinson 1973 Inventory Steamvalve entry: There has been no new activity from the buried feature to date. When the road by-pass and new parking lot was constructed in 1967, the old pavement over Steamvalve’s vent was removed and the surface graded. No effort was made to locate and uncover the vent so only an area of warm ground is present to mark its former location. It is especially visible from rising vapors immediately after a rain or with melting snow. There seems to be no doubt that it will eventually break out again, the only question is when.]
33725 01 Jun 1947 @ 1200 --- research-mab no time No Date - approx start of 1947 season: By the summer of 1947, Steamvalve having blown its way to freedom seemed again content to lie almost inactive. Light steaming from the bottom of the 4 foot crater, however, should be sufficient warning for mere man not to endeavor to close one of nature’s safety valves again. [Verde Watson 1954 working papers]
33719 31 Aug 1946 @ 1200 --- research-mab no time noted - No date - end of month report - New Mud Pool (“Geyser” in Parking Area) Water receded August 1st. Dry for balance of month.
33518 01 Jul 1946 @ 1200 --- research-mab - no times noted - New Mud Pool (“Geyser” in Parking Area) See report to Nature Notes. Depth 3 feet on July 1st, water level falling 1 inch per day. July 11. new rail completed, July 12, Temperature 88.5 C July 13 Temperature 87.5 C Temperature (7:00 p.m.) 84C, July 14 Depth of water 1 foot Temperature 87.5 Mud thickening, July 15 Crater dry. Steam escaping. July 23 Remained dry until afternoon of this date. Crater 1/3 full after heavy rain. Boiling July 25, Water level falling 2 inches per day. July 27 Crater dry, steaming
33718 25 Jun 1946 @ 0800 25 Jun 1946 @ 1900 research-mab [see note June 24] The water was still standing high in the caldron. But by 8:00 o’clock that morning the caldron was completely dry, exposing a 45° funnel-like crater six feet deep, lined with gray sticky clay. The orifice at the bottom of the crater is about ten inches in diameter, but clogged by coarse gravel. By 9:00 a.m. of the same day, water had returned to the crater and risen to a depth of two feet. This was accompanied by violent boiling activity three feet high. At 9:05 a.m. the boiling subsided, only to be followed at 9:10 a.m. by violent activity. By 9:00 a.m. of the same day, water had returned to the crater and risen to a depth of two feet. This was accompanied by violent boiling activity three feet high. At 9:05 a.m. the boiling subsided, only to be followed at 9:10 a.m. by violent activity. While the activity continued, the water level began to fall, leaving the crater dry at 9:20 a.m. Escape of steam and deep rumbling of of boiling action could be heard from the orifice until 10:30 a.m. when the water reappeared. Two feet of water stood in the caldron with violent boiling (splattering 3 to 4 feet high) until 10:40 a.m. when boiling ceased. The pool quietly disappeared at 10:50 a.m. At 11:50 two inches of water came up through the gravel-clogged vent and remained at that level until 1:00 p.m. when it rose to a three-foot depth. Boiling activity, 8 inches high, continued until 7:00 p.m. when once more the surface became very placid. [Yellowstone Nature Notes 1946 Vol 20 #6]
33717 24 Jun 1946 @ 0800 24 Jun 1946 @ 1700 research-mab [See Note May 22 1946] - approx end time - The water level remained the same, with boiling action, up to eight inches in height, until June 24. On this morning at 8:00 a.m. the water level rose to within one inch of overflowing the lower rim (west). The pool was observed closely during the day in anticipation of seeing a pronounced overflow. By the end of the day no overflow had occurred, so an early morning check was made on June 25. [Yellowstone Nature Notes 1946 Vol 20 #6]
33716 22 May 1946 @ 0933 24 May 1946 @ 0900 research-mab - approx Note end time ~48 hours - On the 22nd of May, 1946, at 9:33 a.m. a new thermal features broke through the pavement of the parking area 150 feet east of the Norris Museum. This feature received wide publicity throughout the United States as a new geyser.Motion pictures taken of this geyser in its formative stages show the violent boiling action accompanied by the undermining of the pavement. The initial outbreak of steam was observed by some visitors form Iowa who were parked in the area nearby. Steam and mud started working up through the cracks formed in the pavement and, as the action continued, mud flowed out and over the black top surface. As the mud and debris was removed from below, the surface progressively caved in causing a small 2 x 3 foot crater to form. Violent boiling of the thick muddy water to a height of about three feet was observed to throw droplets of mud as high as fifteen feet at times. In this manner, a flat mud cone was piled up around the rim of the caldron. Undermining of the pavement continued for 48 hours to form a crater measuring 12 x 15 feet. After reaching this size the boiling activity quieted down with the water standing about one foot below the pavement level.The water level remained the same, with boiling action, up to eight inches in height, until June 24. [Yellowstone Nature Notes 1946 Vol 20 #6]
No attachments for this geyser.
Baseline does not exist.