Last Known Eruption
26d 16h 59m ago

Latest Eruptions

Eruption DurationInterval
23 Jun 2024 @ 20372d 6h 53m
21 Jun 2024 @ 13449m
21 Jun 2024 @ 13352h 39m
21 Jun 2024 @ 1056 ie11d 1h 28m
10 Jun 2024 @ 0928 ie1d 20h 36m
08 Jun 2024 @ 1252 ie1d 2h 30m
07 Jun 2024 @ 1022 ie43d 23h 20m
24 Apr 2024 @ 1102 ie208d 20h 41m
28 Sep 2023 @ 1421 ie1y 107d 1h 35m
13 Jun 2022 @ 1246 ie3y 355d 2h 26m
24 Jun 2018 @ 1020 ie3d 10m
21 Jun 2018 @ 1010 ie4y 16d 14h 55m
05 Jun 2014 @ 1915272d 3h 4m
06 Sep 2013 @ 1611 ie2y 2d 23h 56m
04 Sep 2011 @ 16159y 35d 6h 12m
02 Aug 2002 @ 10031y 360d 13h 0m
06 Aug 2000 @ 210329m
06 Aug 2000 @ 20341y 18d 10h 34m
20 Jul 1999 @ 100042d 22h 49m
07 Jun 1999 @ 11112y 333d 20h 51m
08 Jul 1996 @ 14201h 30m
08 Jul 1996 @ 12501h 18m
08 Jul 1996 @ 113257m
08 Jul 1996 @ 10351y 31d 1h 15m
08 Jun 1995 @ 0920122d 17h 5m
05 Feb 1995 @ 1515148d 20h 48m
09 Sep 1994 @ 192738d 7h 22m
02 Aug 1994 @ 120515m
02 Aug 1994 @ 115015m
02 Aug 1994 @ 113513m
02 Aug 1994 @ 112215d 1h 36m
18 Jul 1994 @ 0946 ie22d 19h 4m
25 Jun 1994 @ 14423m 2d 41m
23 Jun 1994 @ 1401 ie3d 39m
20 Jun 1994 @ 13223m 2h 50m
20 Jun 1994 @ 10324m 14d 19h 36m
05 Jun 1994 @ 1456256d 3h 27m
22 Sep 1993 @ 1128:302m 0s
22 Sep 1993 @ 1126:301m
22 Sep 1993 @ 112531d 50m
22 Aug 1993 @ 103539m
22 Aug 1993 @ 095635d 22h 23m
17 Jul 1993 @ 11335m
17 Jul 1993 @ 112813m
17 Jul 1993 @ 111541m
17 Jul 1993 @ 10342d 20h 49m
14 Jul 1993 @ 1345 ie5d 2h 35m
09 Jul 1993 @ 11101d 26m
08 Jul 1993 @ 10442y 311d 22h 53m
31 Aug 1990 @ 11511y 50d 22h 51m
11 Jul 1989 @ 13004d 22h 0m
06 Jul 1989 @ 1500 ie4d 21h 55m
01 Jul 1989 @ 17051d 0m
30 Jun 1989 @ 1705351d 2h 50m
14 Jul 1988 @ 14151y 80d 1h 44m
26 Apr 1987 @ 12311y 18d 31m
08 Apr 1986 @ 1100 ie230d 22h 15m
20 Aug 1985 @ 1345 ie13d 45m
07 Aug 1985 @ 1300 A32d 1h 30m
06 Jul 1985 @ 1130 ? A1y 322d 0m
19 Aug 1983 @ 11309d 0m
10 Aug 1983 @ 1130 ie6d 19h 50m
03 Aug 1983 @ 154025m
03 Aug 1983 @ 1515 ie23h 35m
02 Aug 1983 @ 15408d 19h 40m
24 Jul 1983 @ 2000 A4d 9h 30m
20 Jul 1983 @ 10302y 1d 19h 21m
18 Jul 1981 @ 15094h 9m
18 Jul 1981 @ 110021d 23h 56m
26 Jun 1981 @ 1104340d 18h 49m
20 Jul 1980 @ 1615 ie1y 34d 2h 30m
17 Jun 1979 @ 1345 ie260d 21h 38m
29 Sep 1978 @ 1607 ie14d 2h 40m
15 Sep 1978 @ 1327 ie6d 1h 54m
09 Sep 1978 @ 1133 ie6m
09 Sep 1978 @ 1127 ie45d 22h 57m
25 Jul 1978 @ 12301d 22h 40m
23 Jul 1978 @ 135011d 3h 0m
12 Jul 1978 @ 105029d 20h 20m
12 Jun 1978 @ 1430 ie3d 22h 8m
08 Jun 1978 @ 1622 ie4h 34m
08 Jun 1978 @ 1148 ie69d 21h 3m
30 Mar 1978 @ 1345 A4d 4h 45m
26 Mar 1978 @ 0900 ie23h 33m
25 Mar 1978 @ 0927 ie199d 22h 27m
06 Sep 1977 @ 1200 ie226d 17h 57m
22 Jan 1977 @ 1703 ie127d 5h 3m
17 Sep 1976 @ 1300 ie1d 3h 0m
16 Sep 1976 @ 1000 ie1d 20h 0m
14 Sep 1976 @ 1400 ie1d 15m
13 Sep 1976 @ 1345 ie2d 3h 45m
11 Sep 1976 @ 1000 ie19h 20m
10 Sep 1976 @ 1440 ie1h 15m
10 Sep 1976 @ 1325 ie21h 39m
09 Sep 1976 @ 1546 ie4h 31m
09 Sep 1976 @ 1115 ie1d 20h 59m
07 Sep 1976 @ 14161d 2h 1m
06 Sep 1976 @ 12151d 20h 25m
04 Sep 1976 @ 1550 ie7h 35m
04 Sep 1976 @ 0815 ie2d 18h 30m

Interval Statistics

Interval Count100
Min1m
Max9y 35d 6h 12m
Mean174d 14h 56m
Median5d 17m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
35409 21 Jun 2024 @ 1330 21 Jun 2024 @ 1348 nails Light opalescent blue, roiling and convection every minute or so, occasionally resulting in a burst but usually not.
35145 12 Jun 2024 @ 1000 --- CrisG calm. no activity noted from boardwalk above or Constant bench sit
35066 10 Jun 2024 @ 0906 --- SantaFe108 Not erupting currently.
34242 19 Apr 2024 @ 1130 --- MAB Looked full and a bit cloudy during one very brief glance but mostly impossible to see due to steam from features nearby - couldn't even spot Iris or Onyx and didn't go back in evening
29046 22 Oct 2023 @ 1302 --- SantaFe108 Full and blue with boiling. Iris Spring and Onyx Spring active.
28851 17 Oct 2023 @ 1615 --- MAB can't find BLUE! Strong steam in strong winds upwind - steam parted for a glimpse it looks 2ft low and steam may be from Iris Sp but not sure. Swiss Cheese pools an odd gray color - other Porcelain areas also show a water level drop
28644 05 Oct 2023 @ 1411 --- cb pool is high with vigorous roiling boil in the center. Iris is active erupting 2-3'. Several other vents is the area of Iris that are active.
28299 17 Sep 2023 @ 1202 --- SantaFe108 Full with turquoise-green water and calm. Iris Spring is active.
26837 04 Jul 2023 @ 1414 --- MAB full w/center boil- lighter colloidal blue in center - Iris Spring active
25722 23 May 2023 @ 1316 --- cb is high with no activity
24506 28 Oct 2022 @ 1550 --- MAB full with colloidal blue center - Iris Spring erupting gangbusters
24269 05 Oct 2022 @ 1604 --- cb pool is higher than last observation, at the rim and overflowing. weak center vent convection. Iris is active to 2+'.
23663 08 Sep 2022 @ 1050 --- MAB maybe 2ft low- IRIS is opalescent blue and weakly active - ONYX looks empty w binos or at least totally clear and quiet
23566 04 Sep 2022 @ 1334 --- cb low, ~3' below rim. Turquoise opalescent blue with a boil only identified with binoculars. No features surrounding Blue are active.
23056 05 Aug 2022 @ 1328 --- cb pool low! down 2' from overflow. opalescent blue in the center. Iris not active
22857 26 Jul 2022 @ 1200 --- cb About 2' below overflow with a weak center vent boil. Iris has a occational 6"-1' splash. not much else in the area is active
22699 19 Jul 2022 @ 1225 19 Jul 2022 @ 1229 nails Colloidal blue, slight boil or convection. Water level might be lower than previous note - I can see a “shoreline” of a few feet around pool and no obvious overflow. Iris splashing to a few feet with some quiet pauses.
22665 17 Jul 2022 @ 1111 --- MAB approx time - full, minimal boil - colloidal blue in center
22530 12 Jul 2022 @ 1620 --- cb pool high with only 1 slight bubble in the center. Iris bursting to 2'
22274 01 Jul 2022 @ 1334 --- MAB Iris Sp active - Blue center vent not IE
22168 27 Jun 2022 @ 1120 --- MAB IE w low center boil - IRIS Sp very active huge bursts - vent to E & S in Blue's crater also active - some water flowing east to dry area but not far
22081 23 Jun 2022 @ 1540 --- cb Pool is high, weak boil, color is very blue!
21455 23 May 2022 @ 1225 --- MAB full - a colloidal blue color - east vent in the pool was very active w some tall bursts!
21298 15 May 2022 @ 1229 --- MAB quite full - Iris Spring active
21030 18 Apr 2022 @ 1241 --- MAB Low- Iris Spring active
20322 06 Nov 2021 @ 1700 --- MAB possibly a little more water than lately - Huge bursts from Iris Spring
20044 19 Oct 2021 @ 1239 --- cb still very low pool. weak center boil. Iris & Onxy pools are very low but splashing ~1' in the vent
19922 06 Oct 2021 @ 1557 --- cb pool very low. Down ~4' below the north rim. weak center boil.
19116 27 Aug 2021 @ 1334 --- MAB very low water- several feet of shore within the crater visible- Iris Spring active. Onyx Spring active
18996 22 Aug 2021 @ 1314 --- MAB very low
18885 10 Aug 2021 @ 1015 --- cb Pool is VERY low. ~2+ feet below the rim. side vent is active.
18763 31 Jul 2021 @ 1250 --- MAB Low water - center vent quiet - east vent chugging away
18668 25 Jul 2021 @ 1840 --- cb Blue pool is VERY LOW. down ~3'+. slight boil in the center. Iris is active asis Onyx
18442 14 Jul 2021 @ 1856 --- MAB Not full with a visible 4 pt boil - 2 were the usual center and east - the others N and S. Iris and Onyx active
18273 05 Jul 2021 @ 1601 --- cb Pool is high and overflowing to the north. It has a boil in the center and one near the edge closest to Nuphar lake. Iris is active as are many features and holes in Porcelain basin.
18044 22 Jun 2021 @ 1234 --- MAB Full - as before dry to the north flooded to SE - Iris Sp IE with robust bursts- Onyx IE w large {for it} bursts too
17453 04 Jun 2021 @ 1832 --- MAB Full - crazy storm winds but could see smooth convection in the middle against the wind driven waves - Iris active - funky lighting could not even find Onyx - area N of Blue dry - waters all flow S against the berm
17284 30 May 2021 @ 1439 --- cb Down ~8" below overflow. Iris is active
17069 12 May 2021 @ 1410 --- MAB Full, too steamy to see in. IRIS Spring having Big Bursts
16939 28 Apr 2021 @ 1839 --- MAB area north of Blue looks fairly dry - area south of Blue is flooded - water in Blue down about 8in - Iris is active
16351 06 Oct 2020 @ 1505 --- cb pool is high, the center is turquoise blue with a very weak bubble in the center. The side vent on the south end of the pool is underwater and with binoculars I can see small convection waves.
16210 20 Sep 2020 @ 1635 --- cb water level has come up quite a bit and now includes the small erupting feature on the south end of the pool that was separated by dry land earlier this summer. Color is a milky turquoise blue and has a weak boil in the center.
15789 29 Aug 2020 @ 1017 --- cb pool has come up since last observed. It is a opalescent turquoise blue color with a weak boil in the center. The side perpetual feature to the east is again connected with water in the pool. (higher water marker) Iris active also
15555 13 Aug 2020 @ 1227 --- cb pool is low and milky turquoise in color
15454 07 Aug 2020 @ 1150 --- cb Blue's pool is higher than the 7/27th when i was last able to walk Porcelain basin. Iris is active. Blue has a active boil in the center. Porcelain basin looks more active than I've seen this summer. More features full and erupting. hummm....
14946 10 Jul 2020 @ 1315 --- cb Blue's pool is very low! The erupter that was IN the pool on the south end is now exposed and is ~2' away from the edge of Blue's pool. No bubbles or boils from Blue. The side erupter is about 2' in height.
14599 11 Jun 2020 @ 1636 --- cb pool is turquoise blue in the center with bubbles in the center that are not quite breaking the surface. On the SE edge of the pool is a 1' spouter that did not stop during my observation period
13248 14 Aug 2019 @ 1519 --- cb pool is low and calm.
13050 05 Aug 2019 @ 1728 --- MAB low water level. Iris Spring is more active and Onyx is REALLY more active
12443 11 Jul 2019 @ 1641 --- cb water level is high with some overflow to the north. Occasional small bubbles breaking the surface in the middle of the pool and a constant small (6") erupter on the south end of the pool
12037 29 Jun 2019 @ 1401 --- cb calm and quiet.
11827 16 Jun 2019 @ 1034 --- cb VERYsteamy and almost impossible to see the water level in the pool (63°) I can see a boil on the south edge of the pool.
11019 20 Apr 2019 @ 1000 --- MAB Blue Geyser is full, Iris Spring was erupting vigorously.
10628 19 Oct 2018 @ 1215 --- MAB Still very low - hard to discern crater edge since it's as white as surrounding platform. The fill vent on the east side was just at water's edge. LOW. Iris was active with tiny blips.
9695 10 Aug 2018 @ 1200 --- MAB Seen various times during the day. Water level still well below rim, no boiling. Iris has blips, Onyx is quiet.
9506 06 Aug 2018 @ 1232 --- MAB Much lower water than my last visit, viewed again later in the day it was the same, but I don't know if it is stable or changing daily. Much lower than rim level
9447 03 Aug 2018 @ 1530 --- cb calm and no boil
9000 03 Jul 2018 @ 1300 --- MAB Strong convection but didn't notice any of the bursting today. The smaller east vent was IE off and on. ONYX, lower water but still having big bursts all day. Trail past Hurricane closed for construction
5868 04 Sep 2017 @ 1356 --- novakg Possible Blue eruptions throughout the day. Something large was erupting out there, but I am not sure about the location of Blue.
4812 05 Aug 2017 @ 1800 --- MAB seen overflowing to the west this week
4239 06 Jun 2017 @ 1325 --- JSJ Pool nearly full; no overflow. Slight roiling & bubbling from ~center of pool. Receiving some upstream runoff.
4214 04 Jun 2017 @ 1630 --- MAB Nearly full but not overflowing in any direction. Light blue color with strong convection and roiling. Iris was active.
3567 28 Aug 2016 @ 1345 --- MAB Seen really low on 24th with active filling from that east vent, further observed after several hours it had not refilled any higher. Seen at the same low depth today 28th- don't know if it has filled and drained or is just ... very low now.
2945 01 Jun 2016 @ 1515 --- MAB Full with strong convection or boils
2378 18 Sep 2015 @ 1135 --- MAB Full full full, now overflowing to the outer, outer rim of westerly terraces. Steam obscured the pool all day
2356 15 Sep 2015 @ 1715 --- MAB Observed completely full all day, heavy roiling in the center. Light greenish in color. It was at or near overflow in the Iris Spring area, the fullest I have seen in some time.
2335 12 Sep 2015 @ 1029 12 Sep 2015 @ 1900 MAB Empty yesterday. Full to the rim 1029 today, with the vent on the east completely submerged. Active convection in the middle increased by 1045 and another vent on the north seen with the naked eye. Returning from back basin at 1512, it was only 1/3 full with heavy roiling in the middle. What happened between 1100 and 1500 is anyone's guess.
2325 11 Sep 2015 @ 1039 11 Sep 2015 @ 1225 MAB empty. The east side spouter was barely splashing, definitely a different look than the active refilling I had seen previously.
2267 04 Sep 2015 @ 1010 --- MAB Empty 1000. Seen still (or again) empty at 1530
2226 31 Aug 2015 @ 1107 31 Aug 2015 @ 1840 MAB Seen about half empty 1107, filling and full to the level of the sput on the East side, then seen quite empty again at 1800. I still have yet to see what is happening and why it drains - - an eruption or someone pulls the plug?
2109 12 Aug 2015 @ 1140 12 Aug 2015 @ 1440 MAB This year I have seen Blue with high water and low water. On this day I saw it visibly refilling. Very very low at 1140 and nearly full by 1440
1470 25 Oct 2014 @ 0000 25 Oct 2014 @ 2359 MAB Visible convection/boils on Blue from the overlook
1202 05 Sep 2014 @ 0000 05 Sep 2014 @ 2359 MAB Good convection in Blue, from such a distance at the overlook I could probably call it good boils.
29426 04 Jul 2012 @ 1435 --- research-mab 7/4/2012 Blue Geyser nearly drained 1435, full again 1633
29385 30 Jul 2010 @ 1200 --- research-mab 7/30/2010 - no time noted - I watched Blue Geyser for a little while, and feel safe to say that it is currently erupting. There is a steady intermittent boil with surges up to ~ 3 ft.
29377 05 Jul 2010 @ 1200 --- research-mab 7/5/2010 - no time noted - Blue in porcelain springs unusually active
29942 19 May 1998 @ 1200 --- research-mab 5/19/1998 - no time noted - FYI to staff: Blue is active.
29921 06 Apr 1998 @ 1200 --- research-mab 4/6/1998 - no time noted - Lots of interesting things going on in Porcelain Basin... . Blue geyser is quiet.
29997 26 Aug 1997 @ 1200 --- research-mab 8-26/1997 - no time noted - Blue Geyser still seems to have a bit of indigestion
29988 11 Aug 1997 @ 1200 --- research-mab 8/11/1997 - no time noted - Level of Blue is higher today
29987 09 Aug 1997 @ 1200 --- research-mab 8/9/1997 - no time noted - Blue geyser is fluctuating its water level with activity. It is having tiny eruptions but is still very anemic.
29983 04 Aug 1997 @ 1200 --- research-mab 8/4/1997 - no time noted - Blue active & making noise (like a burp)
29976 31 Jul 1997 @ 1200 --- research-mab 7/31/1997 - no time noted - Pool on Blue seems to be fulling a little more each time I see it.
29973 30 Jul 1997 @ 1055 30 Jul 1997 @ 1105 research-mab 7/30/1997 Blue Geyser is increasing in activity – heavy boil / small eruptions around 1055-1105
30030 19 Jun 1996 @ 1200 --- research-mab 6/19/1996 - no time noted - Blue Geyser is brown in color as is several small pools in the general area.
30141 08 Sep 1995 @ 1000 --- research-mab 9/8/95 - inferred a.m. time - Saw wonderful eruptions from Blue – bursts to maybe 40’.
30107 03 Aug 1995 @ 1200 --- research-mab 8/3/1995- no time noted - Blue is powder blue again. Root beer is light clear blue. Scummy is still churning muddy grey in color. Primrose is empty still and Pinto has lower water levels approx 5” below rim.
30091 29 Jul 1995 @ 1300 --- research-mab 7/29/1995 1300 Blue Geyser is muddy black – the Activity on Porc. Terraces appears quieter than yesterday’s heavily steaming vents & springs
30057 15 Jun 1995 @ 1200 --- research-mab 6/15/1995 - no time noted - Blue Geyser has lower water levels as does Incline.
30041 19 Jan 1995 @ 1200 --- research-mab 1/19/95 - no time noted - Blue geyser pool level was way down. It was slowly filling.
30176 08 Aug 1994 @ 1200 --- research-mab 8/8/1994 - no times noted - Disturbance continues!! Blue is very active. Incline is churning heavily.
30303 16 Sep 1993 @ 1200 --- research-mab 9/16/1993 - no times noted - Blue and others in Porcelain are quiet this afternoon.
30295 01 Sep 1993 @ 1200 --- research-mab Sept 1, 1993 - no time noted - Blue Geyser not erupting, water level down.
30294 31 Aug 1993 @ 1200 --- research-mab August 31, 1993 - no time noted - Dark runoff in Porcelain appears to have come from Blue Geyser. {see Pinwheel Note Aug 27 - mab]
30292 30 Aug 1993 @ 1200 --- research-mab 8/30/1993 - no time noted - Blue Geyser erupting spectacularly
30285 25 Aug 1993 @ 1200 --- research-mab 8/25/1993 - no time noted - Blue, Fireball, Constant erupted in Porcelain.
30263 19 Aug 1993 @ 1200 --- research-mab 8/19/93 - no time noted - Blue Geyser erupting today.
30235 28 Jun 1993 @ 1200 --- research-mab 6/28/93 - no time noted -Blue Geyser erupting with big bursts.
30476 22 Sep 1992 @ 1200 --- research-mab 9/22/1992 - no time noted - Blue quiet
30466 10 Sep 1992 @ 1200 --- research-mab 9/10/92 - no time noted - Blue is erupting dramatically today – could this be where the water has come from to fill Africa? All else seems “normal”
No attachments for this geyser.
Baseline does not exist.