Last Known Eruption
4d 21h 8m ago

Latest Eruptions

Eruption DurationInterval
18 May 2022 @ 1533 ie37y 260d 28m
09 Sep 1984 @ 1504:1931m 2s 31m 2s
09 Sep 1984 @ 1433:1726m 42s 27m 31s
09 Sep 1984 @ 1405:4623m 50s 33m 56s
09 Sep 1984 @ 1331:5028m 18m
09 Sep 1984 @ 1313 ie>12m 50s 2d 23h 28m
06 Sep 1984 @ 1345 ie>30m

Interval Statistics

Interval Count6
Min18m
Max37y 260d 28m
Mean6y 104d 16h 18m
Median32m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
21340 17 May 2022 @ 0844 --- mhreed Murky grey, slight boil, just at overflow.
21291 15 May 2022 @ 1927 --- MAB stronger boil than at 1300 but still no overflow - either low again or still
21295 15 May 2022 @ 1258 --- MAB low - watery green - very few bubbles - no flow
21234 11 May 2022 @ 1928 --- MAB trickle of ovfl down the channel but pool is low and quiet
21242 11 May 2022 @ 1250 --- MAB murky green - below overflow & quiet
21196 06 May 2022 @ 1933 --- MAB mild center boil just inching to overflow- when suddenly strong center boil commenced and strong flow went down the channel - got FLIR - ok that was fun and good timing
21203 06 May 2022 @ 1307 --- MAB way low w bubbles - receiving cool waters from old road grade across the trail
21089 26 Apr 2022 @ 1851 --- MAB low with only quiet convection
21101 26 Apr 2022 @ 1301 --- MAB very low - well below ovfl - a few tiny bubbles
21026 18 Apr 2022 @ 1303 --- MAB steady boil - in ovfl - dirty green color
20324 06 Nov 2021 @ 1609 --- MAB another walkup to a calm pool with a few bubbles - while standing there heavy boil begins
20336 06 Nov 2021 @ 0815 --- MAB light boil - pool below overflow
20292 04 Nov 2021 @ 1639 --- MAB calm - just below overflow- as I wrote it down I could see overflow just creeping down the channel - just a few bubbles at that point
20309 04 Nov 2021 @ 0836 --- MAB full w slight ovfl - light bubbles - 0837 vigorous center boil began
20243 31 Oct 2021 @ 1707 --- MAB wet ovfl - full with convection but no boiling
20259 31 Oct 2021 @ 0842 --- MAB full but not boiling w no overflow upon arrival - bpil started tail end of same minute
20195 29 Oct 2021 @ 1637 --- MAB light boil - well below overflow
20201 29 Oct 2021 @ 0857 --- MAB light boil - slight ovfl
20166 28 Oct 2021 @ 1709 --- MAB a tad lower not quite in overflow
20165 28 Oct 2021 @ 1529 --- MAB light boil slight overflow
20102 24 Oct 2021 @ 1744 --- MAB center boil some ovfl
20114 24 Oct 2021 @ 0929 --- MAB Quiet no boil - pool edges showing 6in to 1ft - no ovfl obviously
20082 22 Oct 2021 @ 1735 --- MAB light center boil - not quite reaching overflow
20092 22 Oct 2021 @ 0859 --- MAB quiet - no boil - no overflow
20016 17 Oct 2021 @ 1726 --- MAB overflow - convection then boil started w my walkup {water visible in the 2nd hole on the shoulder}
20028 17 Oct 2021 @ 0912 --- MAB center boil w overflow - {breakout on south shoulder audible boil but no water visible }
19947 10 Oct 2021 @ 1658 --- MAB light center boil - brownish green color
19954 10 Oct 2021 @ 0924 --- MAB busy center boil - gray green color
19916 05 Oct 2021 @ 1752 --- MAB Strong loud boil with heavy waves heard but not seen at 0851 - at 1752 observed moderate boil - pool was a brownish green color
19907 03 Oct 2021 @ 1325 --- ypcaribou Vigourous roil in middle. Slight overflow. Milky but transparent light sea glass green.
19908 03 Oct 2021 @ 0736 --- ypcaribou Mostly calm pool with gumball-sized bubbles floating up. Possibly just below overflow but too steamy to tell. Slightly milky but trsnsparent light sea glass green
20494 20 Jun 2012 @ 1200 --- research-mab 6/20/2012 “Branch Spring” by Minute Geyser murky; clear yesterday [generic day time]
20495 24 Jun 2000 @ 1200 --- research-mab 6/24/2000 Dr Nordstrom - USGS doing research at Minute and pool next to it (Branch Spring?) - monitored pH & temperature Minute – Boiling 7.19 pH Branch – 80° 3.19 pH He says it may be because the cooler more acidic is drawing water from closer to the surface and hotter more neutral from lower down [generic day time]
20496 20 Sep 1998 @ 1200 --- research-mab 9/20/1998 Branch Spring 172ºF (not as hot as I thought) [generic day time]
20497 13 Sep 1998 @ 1200 --- research-mab 9/13/1998 The spring (I believe unnamed) just beyond Minute appears to be superheated. I’ll measure it tomorrow. {see 9-30 entry mab} {Sketch map with arrow “This spring is named “Branch Spring”} [generic day time]
20528 07 May 1992 @ 1517 --- research-mab 5/7/92 {mushroom in log} – 1517 boiling steadily with a strong overflow
20527 26 Apr 1992 @ 1200 --- research-mab 4/26/1992 {mushroom in log} – quiet, murky [generic day time]
20526 16 May 1991 @ 1200 --- research-mab (5/16/91) Note about Minute Geyser includes ‘lower vent completely filled with water making a pool that goes nearly to adjacent Mushroom Pool’ confirming mis-identification of mushroom thru 1998 [generic day time]
20498 06 Aug 1988 @ 1200 --- research-mab 8/6/1988 Pool to S of Minute - milky blue in color; gentle boiling in center [generic day time]
20525 24 Aug 1987 @ 1200 --- research-mab 8/24/1987 {mushroom in log} - greenish color, lots of boiling in the center of the pool. It is milky so that I can’t see into the water more than 1’ or so [generic day time]
20524 14 Sep 1984 @ 1200 --- research-mab 9/14/1984 seen erupting [no duration of observation - generic day time]
20523 13 Sep 1984 @ 1200 --- research-mab 9/13/1984 seen erupting [no duration of observation - generic day time]
20522 11 Sep 1984 @ 1200 --- research-mab 9/11/1984 light boil only [no duration of observation - generic day time]
20521 09 Sep 1984 @ 1312 --- research-mab 9/9/1984 seen erupting
20520 04 Sep 1984 @ 1200 --- research-mab 9/4/1984 light boil only [no duration of observation- generic day time]
20519 29 Aug 1984 @ 1200 --- research-mab 8/29/1984 light boil only [no duration of observation - generic day time]
20518 28 Aug 1984 @ 1200 --- research-mab 8/28/1984 erupting [no duration of observation - generic day time]
20517 24 Aug 1984 @ 1200 --- research-mab 8/24/1984 continuous light boil only [no duration of observation - generic day time]
20514 21 Aug 1984 @ 1200 --- research-mab Aug 21 1984 UNNG#18 - became active as a geyser on August 21st - Before this it remained a generally clear greenish pool. The few recorded eruptions consisted of boiling to 2" - 3" with moderate discharge. The water level drops about 2" after the eruption. Recorded intervals ranged between 27½ to 34 minutes, with durations of 22½ to 28 minutes - periods of activity seemed to be related with the disturbances of 8/19, 8/27, 9/6, & 9/14 [generic day time]
20516 21 Aug 1984 @ 1159 --- research-mab 8/21/1984 periodic activity 1st seen [generic day time]
20515 20 Aug 1984 @ 1200 --- research-mab 8-20-1984 {RP unng 18} The pH on 8/20 was between 3.0 & 3.4 - during times when this was an active geyser, the water turned a very slightly milky green
20513 12 Jul 1984 @ 1200 --- research-mab 7/12/1984 Minute splashing vent 202° - old vent 148° - Branch {Mushroom in log} 172° [generic day time]
20512 08 Jul 1984 @ 1200 --- research-mab 7/8/1984 Branch {Mushroom in log} Spring 174º F – greenish yellow color – bubbling from vent [generic day time]
20511 08 Jan 1983 @ 1200 --- research-mab January 8 1983 Branch Spring 164º overflowing [generic day time]
20510 20 Feb 1982 @ 1200 --- research-mab February 20 1982 Branch Spring 164° green turbid H2O, overflowing slightly [generic day time]
20509 14 Jan 1982 @ 1200 --- research-mab January 14th 1982 Mushroom Geyser 118º bright green algae lined orange ring around outside. I think that mushroom has seen its better days. R.I.P. [both included before the Mushroom name was mistakenly transferred to Branch 1984-1998] - - - Branch Spring boiling more vigorously than usual green turbid H20 180º [generic day time]
20508 30 Aug 1981 @ 1200 --- research-mab Sunday August 30 1981 Branch green-blue with continual small bubbling, slight overflow 166° [generic day time]
20507 20 Sep 1980 @ 1200 --- research-mab Saturday September 20 1980 Branch Spring– normal turbidity 168ºF, slight overflow [generic day time]
20506 17 Jul 1980 @ 1200 --- research-mab July 17, 1980 “Branch Spring” - Murky grey green with small overflow – 174ºF [generic day time]
20505 21 Sep 1979 @ 1200 --- research-mab Friday September 21 1979 More end of summer changes! “Branch Spring” - murky green, not much different. 164ºF [generic day time]
20504 05 Jul 1979 @ 1200 --- research-mab July 5 1979 Minute Geyser – active vent 201º spraying water to 3 ft. Old vent- few bubbles 143ºF - - - “Branch Spring” (The pool S.E. of Minute Geyser) 170ºF [generic day time]
20503 24 Jun 1979 @ 1200 --- research-mab June 24 1979 Sunday The pool to the southeast of Minute Geyser is very turbid this afternoon, a change from morning [generic day time]
20502 01 Apr 1978 @ 1200 --- research-mab 04/01/1978 Blue-green pool next to Minute (not the vent one foot away from Minute) was quite full, producing generous runoff, and bubbling gently but constantly. [generic day time]
20501 24 Jul 1976 @ 1200 --- research-mab 07/24/1976 Minute Geyser 204º (new name) Green Branch 169º (Pool near Minute) [first use of name – skipping other varieties such as Branch Pool with just a temp listed but they do exist - mab] [generic day time]
20500 27 Sep 1975 @ 1200 --- research-mab 09/27/1975 Overflow was also occurring periodically in circular spring next to Minute Geyser. The several intervals observed were ~ 2 min duration of filling (~20 sec), overflowing and draining (down about 3”). There was ~45 sec of quiescence between these periods of activity. However, there was some fluctuation of the durations of each section of activity [generic day time]
20499 21 Aug 1975 @ 1200 --- research-mab 08/21/1975 unnamed pool next to Minute geyser on trail – is now muddy, was almost a clear green color. Boiling has also increased here, both in area & intensity [generic day time]
No attachments for this geyser.
Baseline does not exist.