Last Known Eruption
14y 21d 8h 44m ago

Latest Eruptions

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.