Last Known Eruption
233d 2h 56m ago

Latest Eruptions

Eruption DurationInterval
30 May 2020 @ 18324y 245d 5h 53m
29 Sep 2015 @ 123931m 1d 20h 24m
27 Sep 2015 @ 1615239d 28m
31 Jan 2015 @ 1447 ie221d 18h 34m
23 Jun 2014 @ 211321d 3h 34m
02 Jun 2014 @ 1739 ie54m
02 Jun 2014 @ 1645 ie6d 4h 2m
27 May 2014 @ 12435m
27 May 2014 @ 123831m
27 May 2014 @ 120735m
27 May 2014 @ 113231m
27 May 2014 @ 110126m
27 May 2014 @ 103528m
27 May 2014 @ 100729m
27 May 2014 @ 093828m
27 May 2014 @ 09101y 315d 21h 55m
15 Jul 2012 @ 11153h 15m
15 Jul 2012 @ 080028y 312d 21h 15m
13 Sep 1983 @ 104512d 19h 51m
31 Aug 1983 @ 1453:309m 5s
31 Aug 1983 @ 1444:256m 11d 21h 46m
19 Aug 1983 @ 16588m 10m
19 Aug 1983 @ 16486m 24m
19 Aug 1983 @ 16247m 11m
19 Aug 1983 @ 16136m 11m
19 Aug 1983 @ 16026m 10m
19 Aug 1983 @ 15526m 12m
19 Aug 1983 @ 15407m 12m
19 Aug 1983 @ 15289m 12m
19 Aug 1983 @ 15167m 11m
19 Aug 1983 @ 15057m 12m
19 Aug 1983 @ 14537m 10m
19 Aug 1983 @ 14435m 12m
19 Aug 1983 @ 14316m 12m
19 Aug 1983 @ 14196m 78d 1h 4m
02 Jun 1983 @ 13159m 13m
02 Jun 1983 @ 130210m 11m
02 Jun 1983 @ 12517m 6m
02 Jun 1983 @ 1245 ie>3m 12d 2h 19m
21 May 1983 @ 102618m
21 May 1983 @ 1008 ie12h 58m
20 May 1983 @ 2110 ie278d 4h 55m
15 Aug 1982 @ 16157m 13s 21m
15 Aug 1982 @ 15546m 51s 47m
15 Aug 1982 @ 15076m 32s 39m
15 Aug 1982 @ 14289m 43s 17m
15 Aug 1982 @ 14117m 33s 42m
15 Aug 1982 @ 13297m 2s 2d 22h 8m
12 Aug 1982 @ 1520:487m 21s 19m 26s
12 Aug 1982 @ 1501:226m 36s 46m 40s
12 Aug 1982 @ 1414:426m 58s 19m 19s
12 Aug 1982 @ 1355:237m 41s 43m 57s
12 Aug 1982 @ 1311:266m 35s 33m 0s
12 Aug 1982 @ 1238:267m 39s 27m 36s
12 Aug 1982 @ 1210:506m 33s 46m
12 Aug 1982 @ 11246m 2s 33d 17h 6m
09 Jul 1982 @ 18182h 4m
09 Jul 1982 @ 161459m
09 Jul 1982 @ 15158m 43m
09 Jul 1982 @ 14329m 1h 8m
09 Jul 1982 @ 1324>10m 1h 10m
09 Jul 1982 @ 12147m 39m
09 Jul 1982 @ 11358m 30s 45m
09 Jul 1982 @ 105016h 34m
08 Jul 1982 @ 18169m 1h 4m
08 Jul 1982 @ 17128m 54m
08 Jul 1982 @ 16188.5m 59m
08 Jul 1982 @ 1519>4m 51m
08 Jul 1982 @ 14288m 17h 50m
07 Jul 1982 @ 2037:168m 10s 1h 19m 4s
07 Jul 1982 @ 1918:127m 55s 46m
07 Jul 1982 @ 1832 ie45m
07 Jul 1982 @ 1746:047m 6s 44m
07 Jul 1982 @ 1702 ie20h 8m
06 Jul 1982 @ 2053:246m 38s 20m 0s
06 Jul 1982 @ 2033:247m 36m 4s
06 Jul 1982 @ 1957:206m 36s 33m
06 Jul 1982 @ 1924 ie>6m 294d 3h 16m
15 Sep 1981 @ 16088m 56s 32m
15 Sep 1981 @ 15369m 13s 4h 41m
15 Sep 1981 @ 10554d 34m
11 Sep 1981 @ 10211d 16h 49m
09 Sep 1981 @ 17329m 17s 44m
09 Sep 1981 @ 16489m 30s 46m
09 Sep 1981 @ 16029m 40s 46m
09 Sep 1981 @ 15168m 29s 48m
09 Sep 1981 @ 14289m 32s 2h 48m
09 Sep 1981 @ 114055m
09 Sep 1981 @ 104518h 37m
08 Sep 1981 @ 1607:18 ?9m 55m 34s
08 Sep 1981 @ 1511:4410m 2s 3h 33m 24s
08 Sep 1981 @ 1138:209m 46s 55m 24s
08 Sep 1981 @ 1042:569m 7s 17h 49m
07 Sep 1981 @ 16539m 10s 55m
07 Sep 1981 @ 15581h 41m
07 Sep 1981 @ 141711m011h 40m
07 Sep 1981 @ 123710m 20s 49m
07 Sep 1981 @ 114811m 30s 3d 18h 33m
03 Sep 1981 @ 171545m
03 Sep 1981 @ 163047m

Interval Statistics

Interval Count100
Min5m
Max28y 312d 21h 15m
Mean141d 11h 47m
Median46m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
2360 15 Sep 2015 @ 1000 --- MAB Near perpetual action (8-10 feet? hard to tell at such distance) most of the day, possibly from the crater next to Graceful, but definitely none of the huge bursts seen on 12th. Steamy and wet day.
1520 28 Feb 2015 @ 1442 28 Feb 2015 @ 1510 Kent Thermal fog in the area of Graceful, but no eruption seen between 1442 and 1510
7648 03 Sep 1990 @ 1800 --- research-mab 09/03/1990 Graceful Geyser – boiling at depth- no eruptions. {no specific time}
4716 24 Jun 1990 @ 1800 --- research-mab 6/24/1990 Graceful which was so spectacular in the early 1980’s, still has small frequent eruptions
4690 07 Jul 1987 @ 1800 --- research-mab 7/7/1987 Graceful Geyser is having notable eruptions several times daily.
7644 26 Jun 1986 @ 1800 --- research-mab 6-26-1986 Graceful Geyser- Dormant, but with 1.4m high boiling from under ledge at NW end of vent. Water is slightly opalescent & down ~1.1m. T=199º
7635 02 Mar 1985 @ 1800 --- research-mab 3-02-85 Graceful Geyser having tall jetting bursts (est. max height 6-8m) – style somewhat like Grand, with massive overflow. One eruption timed D=6m07; estimated interval 15-20 min.
7624 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Graceful Geyser” Dormant. Vent enlarged, subteranean CS playing 0.6-1m Two parasite vents are active as geysers to the west.
4663 06 Jul 1982 @ 1800 --- research-mab 7/6/1982 Graceful – Grover S: Indicator vent is drained, but erupting from 3 spots immediately after Graceful stops, gradually fills + overflows prior to Graceful’s eruption. Its eruptions get more and more powerful (up to 4-5 ft). Graceful erupting grayish water w/ragged play hybrid in appearance between a pool and cone geyser. This probably due to the pool below the vent.
4655 11 Dec 1981 @ 1800 --- research-mab 12/11/1981 Graceful Geyser As I look back on what I’ve written, I see that I forgot to write about the death of Graceful. Sometime in early October, Fred was taking some U.S.G.S. ( I think) folks around the basin so that they could get samples of gas & water. When they got to Graceful, they found that the vent had about tripled in size, there were large caverns under where the rim of the vent was & a lot of large rocks had been thrown out of the vent. It has not been erupting since to my knowledge. While there today, it was splashing some water above the vent, which I don’t recall seeing since it has gone dorment. [sic] There were no large rocks around the vent within 3 feet. You can easily hear a lot of water splashing below. We were in the basin for ~ 4 hours & I didn’t see anything like an eruption but I’ll put up a marker next time that I’m there. Where is Tomas & Milada when we need them? They will be crushed by the news…. Maybe a sympathy card is in order? Temp. 202º
4654 02 Sep 1981 @ 1800 --- research-mab 9/2/1981 “Graceful Geyser” is still a star here at the museum patio. Its eruptions are beautiful . Unable to get an interval – because I was never here long enough to see two successive eruptions.
4647 21 Aug 1981 @ 0900 --- research-mab 8/21/1981 At 09:00 the new geyser described on the preceding page was erupting to 25 feet. The water was much clearer then yesterday. The area within 6-8 feet of the main vent (a) was totally covered with pebbles and rocks. The vent itself was clear of rocks. There was much erosion and new run-off channels around the vent (a). The eruption would start with vent C filling up, and water being ejected to about 6 feet. About 2 minutes later this vent would start overflowing, and ~ ½ minute later the main vent would surge up. The main vent would reach maximum height about 5 seconds after start, and would not diminish until the end. There was no water visible in the vent until the start of the eruption. The eruption of the cave (vent B) would last for the first three minutes of the major eruption, with water occasionally being splashed to 8’ from vent. During the eruption of “B” more water was ejected than from the main vent
4646 20 Aug 1981 @ 1500 --- research-mab 8/20/1981 The birth of a geyser: At 1500 there appeared a water column on the far northern side of Porcelain Basin. A geyser was erupting from a vent 30 in in diameter about 20 yards west of the Collapsed Cave in a continuous stream @ > 15 feet. The eruption paused for 12 minutes then erupted for 11, paused for 12 and erupted again. This time however after 11 minutes it abruptly decreased from 15 to 6 feet and continued to erupt for at least 3 hours continuously in this way. During the eruptions the water was murky and muddy, like tea, and little pebbles were ejected at a rate about 5-15 per minute. During the eruption a cave like vent 6 yards north of main vent splashed and overflowed heavily. And another vent 15 yards west of the man vent erupted along a 8 ft wide crack (No. S) ~ about 6 feet and overflowed between eruptions. This vent would go into a loud steam phase. Tomas V
EntrySourceLinkComment
02 Jun 2014 @ 1739 JSJ https://www.youtube.com/watch?v=W0IY-aXvBjA All 5 clips of this video compilation depict this eruption.
Baseline does not exist.