Last Known Eruption
12y 306d 4h 4m ago

Latest Eruptions

Eruption DurationInterval
26 Jul 2011 @ 1552 ie3d 19h 32m
22 Jul 2011 @ 2020 ie10d 11h 5m
12 Jul 2011 @ 091545m 12y 24d 19h 15m
20 Jun 1999 @ 1400343d 3h 36m
12 Jul 1998 @ 10249d 9m
03 Jul 1998 @ 1015 ie3y 231d 18h 53m
14 Nov 1994 @ 14227m 2s 146d 7m
21 Jun 1994 @ 15151d 17m
20 Jun 1994 @ 14583y 352d 1h 8m
04 Jul 1990 @ 1350357d 22h 30m
11 Jul 1989 @ 1520 ie16d 5h 5m
25 Jun 1989 @ 1015 ie17h 45m
24 Jun 1989 @ 1630>5m 6d 5h 10m
18 Jun 1989 @ 1120 ie14y 310d 14h 59m
15 Aug 1974 @ 202111m 1y 109d 7h 58m
28 Apr 1973 @ 112334d 22h 8m
24 Mar 1973 @ 13156.5m 4d 20h 28m
19 Mar 1973 @ 1647167d 8h 42m
03 Oct 1972 @ 090552d 17h 25m
11 Aug 1972 @ 154022h 5m
10 Aug 1972 @ 1735 A18d 2h 0m
23 Jul 1972 @ 15356d 4h 14m
17 Jul 1972 @ 11214m 30s 18h 57m
16 Jul 1972 @ 1624>5m 5h 39m
16 Jul 1972 @ 10455m 18h 31m
15 Jul 1972 @ 1614 ie5h 39m
15 Jul 1972 @ 1035 A17h 42m
14 Jul 1972 @ 1653 ie4m 5h 33m
14 Jul 1972 @ 11201d 1h 10m
13 Jul 1972 @ 10101d 19h 45m
11 Jul 1972 @ 14255m 20h 1m
10 Jul 1972 @ 18246h 59m
10 Jul 1972 @ 112523h 59m
09 Jul 1972 @ 11267m 19h 3m
08 Jul 1972 @ 16233m 4h 12m
08 Jul 1972 @ 12115m 2d 2h 9m
06 Jul 1972 @ 100221h 52m
05 Jul 1972 @ 1210 ie3d 18h 10m
01 Jul 1972 @ 18001d 4h 45m
30 Jun 1972 @ 13157d 2h 55m
23 Jun 1972 @ 10205d 20h 35m
17 Jun 1972 @ 1345 ie281d 19h 39m
09 Sep 1971 @ 180661d 1h 22m
10 Jul 1971 @ 16441y 21d 3h 44m
19 Jun 1970 @ 13003h 50m
19 Jun 1970 @ 0910306d 15h 25m
16 Aug 1969 @ 1745 ie4d 1h 5m
12 Aug 1969 @ 16401d 22h 45m
10 Aug 1969 @ 1755 ie5d 2h 0m
05 Aug 1969 @ 15556h 10m
05 Aug 1969 @ 0945 ie14d 17h 15m
21 Jul 1969 @ 1630 ie7d 23h 10m
13 Jul 1969 @ 1720 ie7h 20m
13 Jul 1969 @ 1000 ie20d 19h 0m
22 Jun 1969 @ 1500295d 21h 45m
30 Aug 1968 @ 17156d 6h 15m
24 Aug 1968 @ 11004d 22h 15m
19 Aug 1968 @ 12458d 1h 30m
11 Aug 1968 @ 11156d 18h 25m
04 Aug 1968 @ 165042m
04 Aug 1968 @ 16086d 23h 53m
28 Jul 1968 @ 16154d 2h 25m
24 Jul 1968 @ 13501h 35m
24 Jul 1968 @ 12152d 19h 10m
21 Jul 1968 @ 17055d 23h 25m
15 Jul 1968 @ 174040m
15 Jul 1968 @ 170023h 0m
14 Jul 1968 @ 18004d 20m
10 Jul 1968 @ 174023h 45m
09 Jul 1968 @ 175514d 2h 0m
25 Jun 1968 @ 15551h 30m
25 Jun 1968 @ 14251h 35m
25 Jun 1968 @ 12502h 29m
25 Jun 1968 @ 102122h 21m
24 Jun 1968 @ 120019h 25m
23 Jun 1968 @ 16352h 29m
23 Jun 1968 @ 14062h 34m
23 Jun 1968 @ 11324d 37m
19 Jun 1968 @ 1055 ie1d 23h 55m
17 Jun 1968 @ 110019h 35m
16 Jun 1968 @ 15251h 2m
16 Jun 1968 @ 142338m
16 Jun 1968 @ 134517m
16 Jun 1968 @ 13281h 43m
16 Jun 1968 @ 11451h 45m
16 Jun 1968 @ 10004d 18h 15m
11 Jun 1968 @ 1545298d 22h 43m
17 Aug 1967 @ 17024m 1h 42m
17 Aug 1967 @ 15205m 3h 20m
17 Aug 1967 @ 12005m

Interval Statistics

Interval Count89
Min17m
Max14y 310d 14h 59m
Mean180d 7h 51m
Median2d 19h 10m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
30209 27 Sep 1994 @ 1200 --- research-mab 9/27/1994 - no time noted - Fireball has gone nuts. Eruptions every hour to hour and 15 minutes. Fan was seen twice today.
7642 26 Jun 1986 @ 1800 --- research-mab 6-26-1986 Fan Geyser – Dormant, full & overflowing slightly opalescent water. Stromatolite growth forms around vent are all dead & silicified. T=193º
7605 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Fan Geyser – 29ºC Water flowing in from east, Yellow l. brown algae in vent.
7666 31 Aug 1983 @ 1800 --- research-mab 8-31-83 Fan G Quiet, water flowing in. 36ºC
31050 19 Feb 1983 @ 1200 --- research-mab 2/19/1983 - no time noted - Fan Geyser 90º calm with dark gold algae
31342 17 Jul 1982 @ 1200 --- research-mab Some Temps from Porcelain Basinland taken on July 17th - no time noted - Fan 204º splashing 5-8” over the vent. Fan was in a superheated boil.
31214 15 Jan 1982 @ 1200 --- research-mab January 15th, 1982 - no time noted - Fan 200º superheated boil
31592 11 Dec 1981 @ 1200 --- research-mab Dec 11 1981 - no time noted - Fan Geyser 204º splashing to 1’ - H20 level 8” below vent.
31460 02 Aug 1981 @ 1200 --- research-mab Sunday August 2 1981 - no time noted - Fan Geyser – clear water 8 inches down, 205ºF
31802 22 Sep 1980 @ 1200 --- research-mab Monday Sept 22, 1980 - no time noted - One week following the disturbance, some porcelain basin observations - Fan Geyser – Water down 18 inches, boiling 205ºF
31744 09 Sep 1980 @ 1200 --- research-mab Tuesday Sept 9 1980 - no time noted - Fan – clear bubbling water, no overflow
5086 24 Jun 1980 @ 1800 --- research-mab 06/24/1980 Fan Geyser was seen in eruption today.
31617 08 Jun 1980 @ 1200 --- research-mab June 8 1980 - no time noted - Fan Geyser – gurgling 1 foot down, 205ºF
5144 27 Sep 1979 @ 1200 --- research-mab 09/27/1979 - no time noted - Fan – 201ºF clear water, but lower level
31979 22 Sep 1979 @ 1200 --- research-mab Saturday September 22 1979 - no times noted - Fireball is now periodic again, with action out of Fan. Arsenic weak, but perpetual.
5004 20 Sep 1979 @ 1800 --- research-mab 09/20/1979 Disturbance Fan Geyser – erupting to 1 foot with a noisy boil. No overflow 200ºF
31937 18 Sep 1979 @ 1200 --- research-mab Sept 18 1979 - no time noted - Fan Geyser 204° bubbling
32253 14 Dec 1978 @ 1200 --- research-mab Thursday December 14 1978 - no time noted - Rick H - Fan Geyser – Dormant T=94ºC
32241 06 Nov 1978 @ 1200 --- research-mab 11/06/1978 - no time noted - Fan Geyser had water in the vent and was boiling at 202ºF
5939 25 Mar 1973 @ 1800 --- research-mab 03/25/1973 Fan {no time} The periods of minor play this evening was generally 10-15 seconds in duration and seemed to indicate that an eruption of Fan was imminent. During a half hour of close observation (until it got dark) the intervals between periods of minor play with heavy runoff were as follows: 2m30s, 1m45s, 1m50s, 2m35s, 1m15s, 0m35s, 3m10s, (Africa and Fireball start up), 4m35s, 0m40s, 1m20s, 3m20s, 2m55s, 0m30s (Africa&Fireball active) It is quite probable that Fan may have played within the last half hour. (Ave of 13 intervals: 125 sec, range 30-275 sec)
32899 17 May 1972 @ 1200 --- research-mab 05/17/1972 - no time noted - Observed a good “show” from Fan Geyser for the first time this season.
6505 15 May 1972 @ 1800 --- research-mab 05/15/1972 Fan – plays 1’-3’ frequently 199º
33271 15 May 1972 @ 1200 --- research-mab 1972 May 15 - no time - 199F (see log) Fan has not been observed enough this summer to get any good time of the cycle. Observed in eruption about ten times all summer. Will erupt about five to seven minutes from fifteen to twenty feet.
6307 14 May 1972 @ 1800 --- research-mab 05/14/1972 The following geysers have been seen erupting since I arrived last night: Ledge 6-10’, Iris 2-3’, Little Whirligig 15’, Basin 1’-2’, Fan 4’-5’, Bear Den, Feisty, Fireball 2-3’, Minute 1’-2’, Blue 7-15’, Africa 25-35’, Vixen 7’-15’, Dr Morey’s Porkchop 3’-5’, Echinus 10’-40’, Steamboat 5-20’
33272 31 Jul 1971 @ 1200 --- research-mab July 31 1971 - no time - playing less than last year, may be that some of the activity has moved to the new Africa geyser. Water 94C (201F) Will play with Africa some times.
7672 12 Aug 1970 @ 1800 --- research-mab 08/12/1970 Much activity in Porcelain in late pm (6-7) Arsenic, Fireball, and Fan went off in succession. 8/12/1970 Dark Cavern had extended eruption also.
33273 30 Jun 1970 @ 1200 --- research-mab June 1970 – no time - No change, playing several times per week. [NOTE no date in Thermal Record – EOM]
33276 19 Aug 1969 @ 1200 --- research-mab 1969- Aug 19 - no time - 198ºF. Small bubbling activity most of the time. Erupts about ____ minutes for ____ minutes.
7497 09 Jul 1969 @ 1200 --- research-mab 07/09/1969 Fan putting out small amounts of H2O all morning.
20562 21 Aug 1967 @ 1800 --- research-mab 08/21/1967 The new geyser in Porcelain Basin has cleared up, but is more back to its normal 1 ft boiling.
33275 17 Aug 1967 @ 1702 --- research-mab Aug 17 - The geyser played again at 5:02 about 20 feet for ten minutes.
33274 17 Aug 1967 @ 1200 --- research-mab Aug 17 1967 12:00 a.m. [sic – see log entries as PM] The geyser is located north of Fireball Geyser... The geyser has been playing only 3 to 6 inches all summer. On Aug 17 the geyser played muddy water about 12 to 15 feet for about 10 minutes. = The geyser played again at 5:02 about 20 feet for ten minutes.
EntrySourceLinkComment
21 Jun 1994 @ 1517 JSJ https://www.youtube.com/watch?v=s8IaOePjk4s Video by David Schwarz of Fan Geyser's mid-afternoon eruption on 21 June 1994.
Baseline does not exist.