Last Known Eruption
179d 11h 14m ago

Latest Eruptions

Eruption DurationInterval
13 Jun 2024 @ 0925102y 19d 22h 53m
25 May 2022 @ 1032 ie>6m 14d 22m
11 May 2022 @ 1010 ie17d 2h 6m
24 Apr 2022 @ 08048m 171d 17h 46m
03 Nov 2021 @ 1418 ie9y 81d 4h 59m
16 Aug 2012 @ 091916h 4m
15 Aug 2012 @ 171528d 4h 4m
18 Jul 2012 @ 131121h 40m
17 Jul 2012 @ 1531 ie24d 23h 1m
22 Jun 2012 @ 16301d 23h 46m
20 Jun 2012 @ 16448h 7m
20 Jun 2012 @ 08377d 15h 17m
12 Jun 2012 @ 17207h 37m
12 Jun 2012 @ 0943 ie3y 44d 18h 28m
29 Apr 2009 @ 15154y 209d 2h 5m
03 Oct 2004 @ 131017d 20h 55m
15 Sep 2004 @ 1615 A2y 19d 4h 14m
28 Aug 2002 @ 120120m 48d 22h 23m
10 Jul 2002 @ 13389m 5d 12m
05 Jul 2002 @ 13261y 78d 20h 32m
17 Apr 2001 @ 165410m 37s 255d 22h 11m
04 Aug 2000 @ 184337d 6h 41m
28 Jun 2000 @ 1202276d 19h 32m
25 Sep 1999 @ 163015m 64d 51m
23 Jul 1999 @ 15394d 54m
19 Jul 1999 @ 144512d 4h 48m
07 Jul 1999 @ 09574m 1y 358d 1h 33m
14 Jul 1997 @ 08242y 79d 22h 29m
26 Apr 1995 @ 0955309d 20h 42m
20 Jun 1994 @ 131319d 16h 32m
31 May 1994 @ 204112m 23d 3h 32m
08 May 1994 @ 170926m 13d 10h 9m
25 Apr 1994 @ 07002y 269d 15h 34m
30 Jul 1991 @ 15266m 1y 42d 3h 33m
18 Jun 1990 @ 11537m 1d 19h 29m
16 Jun 1990 @ 1624332d 23h 9m
18 Jul 1989 @ 1715>10m 1y 10d 7h 5m
08 Jul 1988 @ 1010 ? A3y 306d 19h 30m
05 Sep 1984 @ 144012d 23h 45m
23 Aug 1984 @ 14552y 97d 18h 45m
18 May 1982 @ 20102m 8m
18 May 1982 @ 2002277d 10h 39m
14 Aug 1981 @ 092312d 20h 59m
01 Aug 1981 @ 12246m 5d 1h 34m
27 Jul 1981 @ 10502d 22h 47m
24 Jul 1981 @ 12035d 21h 43m
18 Jul 1981 @ 14204d 22h 46m
13 Jul 1981 @ 15349m 314d 56m
02 Sep 1980 @ 14386d 22h 30m
26 Aug 1980 @ 1608 ie4d 19m
22 Aug 1980 @ 154911d 27m
11 Aug 1980 @ 1522 ie3d 1h 45m
08 Aug 1980 @ 133712d 22h 11m
26 Jul 1980 @ 152636d 3h 34m
20 Jun 1980 @ 11521y 285d 9m
09 Sep 1978 @ 11434d 20h 53m
04 Sep 1978 @ 145027d 23h 5m
07 Aug 1978 @ 15451d 4h 42m
06 Aug 1978 @ 11034d 18h 40m
01 Aug 1978 @ 16232m 1h 28m
01 Aug 1978 @ 14553m 8d 40m
24 Jul 1978 @ 14152d 45m
22 Jul 1978 @ 1330 ie9d 3h 43m
13 Jul 1978 @ 09472d 1h 2m
11 Jul 1978 @ 084513d 22h 16m
27 Jun 1978 @ 10292m 11s 4d 20h 54m
22 Jun 1978 @ 1335 ie3d 22h 20m
18 Jun 1978 @ 151545m
18 Jun 1978 @ 143030m
18 Jun 1978 @ 14004d 21h 35m
13 Jun 1978 @ 16251m 3s 12d 2h 9m
01 Jun 1978 @ 1416324d 20h 43m
11 Jul 1977 @ 1733315d 56m
30 Aug 1976 @ 16372m
30 Aug 1976 @ 16354d 3h 48m
26 Aug 1976 @ 1247 A20h 42m
25 Aug 1976 @ 1605 A2y 70d 16h 5m
17 Jun 1974 @ 0000 A1y 96d 4h 51m
12 Mar 1973 @ 18091d 2h 29m
11 Mar 1973 @ 1540 A160d 25m
02 Oct 1972 @ 1615 A58d 6h 1m
05 Aug 1972 @ 10142m 7m
05 Aug 1972 @ 10072m 27m
05 Aug 1972 @ 09402m 4d 22h 32m
31 Jul 1972 @ 11084m
31 Jul 1972 @ 110418d 7h 34m
13 Jul 1972 @ 0330 A6d 2h 21m
07 Jul 1972 @ 01092m 34m
07 Jul 1972 @ 0035 A2d 53m
04 Jul 1972 @ 23422m 32m
04 Jul 1972 @ 23102m 40s 2d 1h 54m
02 Jul 1972 @ 21161m 50s 21m
02 Jul 1972 @ 2055 A6d 5h 10m
26 Jun 1972 @ 15454d 6h 25m
22 Jun 1972 @ 09207m
22 Jun 1972 @ 09132d 19m
20 Jun 1972 @ 085439m
20 Jun 1972 @ 08151d 21h 40m
18 Jun 1972 @ 10352m 15s 5m
18 Jun 1972 @ 10302m 1d 17h 52m

Interval Statistics

Interval Count100
Min2m
Max9y 81d 4h 59m
Mean189d 21h 31m
Median7d 19h 58m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
37769 25 Oct 2024 @ 1645 --- MAB noticed a channel w water coming from the alcove
37351 03 Oct 2024 @ 1010 --- SantaFe108 Gently emitting steam, no liquid water seen in my quick look.
35411 21 Jun 2024 @ 1403 --- nails Quietly steaming
35076 10 Jun 2024 @ 1216 --- SantaFe108 Calmly steaming, did not see any spitting any time I observed it.
34228 19 Apr 2024 @ 0906 --- MAB light steam - walkby from the other side later in the morn showed a quiet vent - no spritzes seen
28904 20 Oct 2023 @ 0759 --- MAB audible splashing
26871 06 Jul 2023 @ 2012 06 Jul 2023 @ 2017 nails Occasionally splashing a small amount of water
26502 20 Jun 2023 @ 1248 --- SantaFe108 Lazily spritzing in the uphill direction.
26430 17 Jun 2023 @ 1608 --- JSJ Occasional lazy splash.
25873 28 May 2023 @ 2028 --- SantaFe108 Occasionally spitting out small spikes of water uphill.
25652 21 May 2023 @ 1352 --- SantaFe108 Occasionally tossing out ~6ft spikes of water.
25534 18 May 2023 @ 0904 --- MAB quietly steaming - tossed one small lazy splash
25148 11 Apr 2023 @ 1217 --- mhreed Splashing.
25047 27 Feb 2023 @ 1444 --- MAB visible spritzing - too steamy to see channel below it EDIT: photos show a defined channel below the alcove but inconclusive whether Guardian is having full eruptions
22759 21 Jul 2022 @ 1022 --- nails Occasional splashing
22750 20 Jul 2022 @ 2024 20 Jul 2022 @ 2034 nails Occasionally splashing water. First few were like someone throwing a cup of water. Built to some four foot splashes, calmed back to gentle steaming by 2030. Cup sized splashing starting again at 2034.
22329 04 Jul 2022 @ 1840 --- cb occasionally spitting water to 4'
22171 27 Jun 2022 @ 0815 --- MAB audible splashes - also that pool below {west} of Guardian in Lewis Mudpot area full full full on June 3 dropped considerably
21481 25 May 2022 @ 0740 --- TSBryan steady steam
21454 23 May 2022 @ 0845 --- MAB low splashes
21237 11 May 2022 @ 1602 --- MAB heavy steam column appeared in the spot where Guardian's plume was visible from Vixen back in the day when it was a continuous high pressure steam vent which may be of interest if we ever get closed intervals of Guardian - just an observation and speculation
21122 28 Apr 2022 @ 1147 --- DanS Occasional splashes
21114 27 Apr 2022 @ 1628 --- DanS Small intermittent sprays of water.
21065 24 Apr 2022 @ 0752 24 Apr 2022 @ 0754 User34 Splashing
21064 24 Apr 2022 @ 0742 --- User34 Some low splashes and then a spike of water to 10-15 feet
21063 24 Apr 2022 @ 0732 --- User34 Gently puffing steam
21035 18 Apr 2022 @ 0935 --- MAB quiet steam - looks like a few channels in the sands below but hard to get a view - no ice cone or remnants
20278 03 Nov 2021 @ 0823 --- MAB puffing steam
20177 28 Oct 2021 @ 0836 --- MAB light steam
19133 28 Aug 2021 @ 1242 --- Graham Not in steam phase. Unsure when it quit this season? It was active this spring.
16951 28 Apr 2021 @ 0926 --- MAB forced steam - no ice cone
8760 18 Jun 2018 @ 1007 --- JSJ Moderately forceful steaming.
29409 03 Jun 2012 @ 1600 --- research-mab 6/3/2012 Black Growler (or Guardian written in 6/21) eruptive cycle 1600-1545
29406 21 May 2012 @ 1815 --- research-mab 5/21/2012 Guardian appeared to undergo an eruptive cycle of some kind. Approx. 1815, only a wisp of steam rose from the vent. About 15 minutes later, steam and spray was forcefully jetting ~ 10 feet into the air from the vent. {note to future researchers - logbook said Black Growler - there was lots confusion this year since Guardian was in a high powered steam phase and they thought it was Black Growler until later in the summer - mab}
30196 31 Aug 1994 @ 1200 --- research-mab 8/31/1994 - no time noted - Met w/a geyser gazer who saw Ledge start on 8/28. he said from the boardwalk heading towards Dark Cavern he saw water spouting from Valentine & Guardian.
10890 28 Sep 1993 @ 0800 --- research-mab 9/28/1993 {generic time} More on Guardian Geyser. It used to have a beehive shaped cone. Since it flipped its lid there is a visible vent and a dark red cap, which is the peeled back top of the cone
10889 27 Sep 1993 @ 0800 --- research-mab 9/27/1993 {generic time} Guardian Geyser has blown off the north half of its cone
10888 23 Sep 1993 @ 1611 --- research-mab 9/23/1993 Guardian steam phase 1611
5370 24 Jun 1989 @ 1800 --- research-mab 6/24/1989 Roved past Guardian Valentine. Guardian was having 1-2’ bursts Valentin had a wet outflow. Scott & Carolyn set up sticks to check for future eruptions.
31005 29 Jul 1984 @ 1200 --- research-mab Sunday July 29 - no time noted - Guardian is unusually steamy today! The force of the steam has greatly increased since my last close observation of 3 weeks ago. Beautiful deposits of brown, gold, orange and black have increased around the vent. {entry also includes new geyser 45 ft north of Guardian mab}
7633 25 May 1984 @ 1800 --- research-mab 5-25-84 Cistern Guardian Geyser is a continuous spouter, has been for at least a year. What is noteworthy is its bronz[e] colored metallic sulfide deposit lining which extends out to the vents upper rim & is estimated to be at least a centimeter thick.
7613 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Guardian Geyser Continuous strong fumarole.
31251 20 Feb 1982 @ 1200 --- research-mab February 20 1982 - no time noted - Guardian Geyser 202º still erupting with an occasional splash
31194 15 Jan 1982 @ 1200 --- research-mab January 15th, 1982 - no time noted - Guardian Geyser 202º steaming gently and occasional splashes
31581 27 Nov 1981 @ 1200 --- research-mab Nov 27th 1981 - no time noted - Guardian - 200º emitting steam mixed with fine spray; still very active
31791 22 Sep 1980 @ 1200 --- research-mab Monday Sept 22, 1980 - no time noted - One week following the disturbance, some porcelain basin observations: Guardian Geyser -splashing 204ºF
31731 06 Sep 1980 @ 1200 --- research-mab Sat Sept 6 1980 - no time noted - Guardian Geyser – steaming 204°F
4598 21 Aug 1980 @ 0000 --- research-mab Aug 21 1980 It looks like Guardian geyser is acting up. Our VIP saw 6’ bursts of water coming out of the crack. I saw water 10” above the crack.
31983 27 Sep 1979 @ 1200 --- research-mab September 27 1979 - no time noted - Guardian – 201ºF – steaming and splashing
31946 20 Sep 1979 @ 1800 --- research-mab Thursday Sept 20 1979 - Disturbance check after 1730 - Guardian Geyser – in addition to steaming continually had periodic sprays of fine water 10 feet out in the direction of Valentine. Temperature 200ºF
32240 06 Nov 1978 @ 1200 --- research-mab 11/06/1978 - no time noted - Guardian Geyser 202ºF in heavy steam
32587 21 Sep 1976 @ 1200 --- research-mab 09/21/1976 - no time noted - Observed a strange looking string-like growth commin’ out of Gardian [sic] Geyser Cone. One end is coiled around a rock with the other end down the vent. By-the-way, where’s the thermometer?
6008 06 Jun 1973 @ 0810 --- research-mab 06/06/1973 Valentine in strong steam phase, but water cold in runoff channel. Guardian steaming profusely 0810
6009 06 Jun 1973 @ 0800 --- research-mab 06/08/1973 {no time- probably morning} Guardian marker replace (2 ½ month interval?)
6043 25 May 1973 @ 1800 --- research-mab 05/25/1973 Guardian seemed to be steaming more than I recalled .{no time}
6003 17 May 1973 @ 1800 --- research-mab 05/17/1973 Guardian {marker} in place.
5996 04 May 1973 @ 2000 --- research-mab 05/04/1973 Ledge Valentine Ebony markers all replaced 8pm Guardian still has not budged.
5980 30 Apr 1973 @ 1800 --- research-mab 04/30/1973 Guardian Geyser -= Normally associated with Valentine, there has been no eruption at all this month or since at least March 28th.
5993 27 Apr 1973 @ 0800 --- research-mab 04/27/1973 (markers) only Guardian which has been inactive since March 28 was still in place.
5944 31 Mar 1973 @ 1800 --- research-mab 03/31/1973 from Valentine Summary ~ Guardian Geyser, which only plays immediately before or after an eruption of Valentine, was irregular, playing 11 out of the 20 possible times.
5951 29 Mar 1973 @ 0945 --- research-mab 03/29/1973 with Valentine Guardian did not play
5949 22 Mar 1973 @ 1545 --- research-mab 03/21/1973 (with Valentine) Guardian did not play
32729 18 Mar 1973 @ 1200 --- research-mab 03/18/1973 - no time noted - S 880, E 265 Guardian Geyser 2 vents actively being eroded and weathered into 1. L43” combined, W (max) = 12” D=+___. 200º
5947 16 Mar 1973 @ 0800 --- research-mab 03/10/1973 with Valentine Guardian did not play {Valentine stated as "night" in summary}
5946 10 Mar 1973 @ 1204 --- research-mab 03/10/1973 with Valentine Guardian did not play
6423 19 Aug 1972 @ 1800 --- research-mab 08/19/1972 Guardian Geyser – marker still in place – it has missed playing for the last 6 eruptions of Valentine Geyser.
6391 13 Aug 1972 @ 1800 --- research-mab 08/13/1972 Guardian G did not erupted in conjunction with Valentine its markers are still in place. Pinwheel down again very little water draining in, no runoff. {no time noted}
33359 09 Aug 1972 @ 1200 --- research-mab 1972 – no time - Will erupt with Valentine geyser – The eruption is of three plays about six to eight minutes apart. (See log) The activity after Aug 9th was not the same as before. It was not seen to play with Valentine.
6377 31 Jul 1972 @ 1108 --- research-mab 07/31/1972 Guardian each time for 2 min- there was at least one eruption before these two
6352 11 Jul 1972 @ 2337 --- research-mab 07/11/1972 Guardian recycled at 1137 pm
6342 18 Jun 1972 @ 1015 18 Jun 1972 @ 1035 research-mab 06/18/1972 Guardian Geyser played 3 times; the first one was not seen but it washed away the marker & was apparently very near the time of the beginning of the eruption of Valentine. The second was at 10:30 for 2 minutes, the third at 1035 for 2m15s, the earlier one was again approximately twice as powerful as the last.
6539 02 Sep 1971 @ 1800 --- research-mab 09/02/1971 Guardian Geyser below Valentine appear to have a lot more vigor and activity: the opening to the “main vent” is larger and there is a considerable washing and erosion of the altered rhyolite ridge to the south of it.
33358 31 Jul 1971 @ 1200 --- research-mab 1971 July 31 - no time - Has played this spring, may have been with Valentine? Has killed the grass that was in front of the vent Steam 28C (82F) Some time after played.
6557 15 Jul 1971 @ 0800 --- research-mab 07/15/1971 Valentine Geyser & Guardian Geyser played sometime during the night. There is an increase in steam activity all around the Valentine, especially at Black Growler.
33360 30 Jun 1970 @ 1200 --- research-mab 87. Guardian Geyser* June 1970 - no time no date EOM - Inactive as Valentine is.
No attachments for this geyser.
Baseline does not exist.