| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 22319 |
04 Jul 2022 @ 1441 |
--- |
cb |
same with a bit taller blooping boil (6") on the edge of the pool toward Yellow Funnel |
| 22209 |
29 Jun 2022 @ 1403 |
--- |
cb |
no change |
| 22118 |
25 Jun 2022 @ 1137 |
--- |
cb |
Muddy light brown color, 6" blooping boil on the edge toward ORBY |
| 22091 |
23 Jun 2022 @ 1814 |
--- |
cb |
pool is high with a 6" blooping boil on the north edge |
| 21042 |
18 Apr 2022 @ 1715 |
--- |
MAB |
Mystery Pool - Full w cloudy bluish water and suspended material around edge - in overflow but no boiling seen thru steam - small circular pool to the NE same color with no boils observed |
| 20296 |
04 Nov 2021 @ 1218 |
--- |
MAB |
not as full but still flowing out towards Yellow Funnel - associated NE spouter was dirty yellowish with vigorous boilers all along far edge
[Mystery Pool, Peale #59, RCN NBBNN004] |
| 20053 |
19 Oct 2021 @ 1400 |
--- |
cb |
Pool color is mostly clear blue green color with a small bubbler on the edge by the boardwalk. Pool to the side is light brown in color and bubbling on the edge toward Yellow Funnel |
| 19621 |
16 Sep 2021 @ 0933 |
--- |
MAB |
- little circular spouter to NE was IE w tan yellow water - NBK-8 water murky green |
| 20561 |
15 Sep 1984 @ 1200 |
--- |
research-mab |
09/15/1984 ….on 9/15, for the first time, a vent located a few yards to the Northeast of the pool began spouting to 4"-5" [generic time] |
| 20537 |
18 Jul 1984 @ 1200 |
--- |
research-mab |
7/18/1984 Hayden’s #59 (no name) 182º pH 3.7 [generic day time] |
| 20538 |
21 May 1983 @ 1200 |
--- |
research-mab |
May 21 1983
Unnamed Feature S. of Yellow Funnel Spring – Full of opaque grey water, heavy boiling from 2 points. Slight runoff. [generic day time] |
| 20539 |
08 Jul 1982 @ 1200 |
--- |
research-mab |
7/8/1982
Unnamed Pool 80 ft S of Yellow Mud Spring – dark muddy water, 1½ ft splashes at 12:12 w/overflow, overflow stops 12:13 - Boiling from 3 vents. [generic day time] |
| 20540 |
24 Jan 1982 @ 1200 |
--- |
research-mab |
January 14th 1982
Unnamed Pool 80’ S of M. Spring dark blackish water, constant boil to 10”, evidence of periodic overflow 180° silica spines surrounding. [generic day time] |
| 20541 |
15 Nov 1981 @ 1200 |
--- |
research-mab |
Nov 15 1981
Yellow Mud Spring dark green slightly turbid H2O, calm with a slight overflow 70° - - Unnamed pool 80’ S of Y.M. Spring - 180° gray turbid H2O boiling to 1’, runoff channel is wet so it is probably still erupting but I didn’t [get] to see any bursting while there. [generic day time] {both included for amazing temp difference} |
| 20542 |
31 Aug 1981 @ 1200 |
--- |
research-mab |
Sunday August 30 1981 -
Unnamed Pool 80’ S of Yellow Mud Spring 190° H2O level 4” from surface between eruptions [generic day time] |
| 20543 |
15 Aug 1981 @ 1200 |
--- |
research-mab |
Sat Aug 15 1981
Pool 80’ S of Yellow Mud Spring H2O level 14” from the surface but bursts to 8’ 196° [generic day time] |
| 20544 |
05 Aug 1981 @ 1200 |
--- |
research-mab |
August 5, 1981
Unnamed Spring 80’ South of Yellow Mud Spring H2O level down ~1½’ with recent overflow & boil to 3’. Within 5 min H2O level rose to the top & began overflow. Bursts to 4’ 196° [generic day time] |
| 20545 |
02 Aug 1981 @ 1200 |
--- |
research-mab |
8/2/1981
Unnamed Pool 80’ South of Yellow Mud Spring - 178°
- - - grey brown turbid pool continuous bubbling to 2’ with slight overflow [generic day time] |
| 20546 |
06 Jun 1981 @ 1200 |
--- |
research-mab |
Saturday June 6 1981
Large unnamed pool south of Yellow Mud – periodic burst from north section to 1 foot – opaque gray, evidence of recent overflow 183ºF [generic day time] |
| 20547 |
15 Sep 1980 @ 1200 |
--- |
research-mab |
Monday September 15, 1980 -
An unnamed pool 100 feet south of Yellow Mud – Grey-opaque, erupting and overflow. - This feature always gets riled up with the disturbance. 172ºF. [generic day time] |
| 20548 |
23 Aug 1980 @ 1200 |
--- |
research-mab |
Saturday August 23 1980
Unnamed Large Pool South of Yellow Mud Spring- Overflowing Blue-Green slightly turbid water. 182°F [generic day time] |
| 20550 |
09 Jun 1980 @ 1200 |
--- |
research-mab |
JUNE 9 1980
Unnamed large spring west of trail and approx 80’ south of Yellow Mud Spring, murky aquamarine color and overflowing 181º [generic day time] {observations made over the week and entered on 9th mab} |
| 20551 |
11 Oct 1979 @ 1200 |
--- |
research-mab |
October 11 1979
The Back Basin has shown a number of changes since disturbance.
Large spring south of Yellow Mud was the most active I have seen it, throwing periodic bursts up to 5 feet. Overflow occurring. [generic day time] |
| 20552 |
28 Sep 1979 @ 1200 |
--- |
research-mab |
September 28 1979
Pool to south of Yellow Mud Spring – 184ºF- continues to erupt hitting about 1 foot. No overflow. [generic day time] |
| 20553 |
21 Sep 1979 @ 1200 |
--- |
research-mab |
Friday September 21 1979 -
Spring 90 feet south of Yellow Mud erupting chocolate gray water 1 to 4 feet. Evidence of more forceful eruption in wet runoff channels. 189ºF. This spring was also very active last year during the season’s end disturbance. [generic day time] |
| 20554 |
24 Aug 1979 @ 1200 |
--- |
research-mab |
August 24 1979
Someone left their broken bong in Porcelain Basin.
A few of the pools in the Back Basin seem to be boiling more active this morning. Root Pool, Decker Geyser and the unnamed pool south of Mud Spring all seem to be more vigorous. [generic day time] |
| 20555 |
26 Aug 1977 @ 1200 |
--- |
research-mab |
08/26/1977
Back Basin report- Most features are clearing up. The unnamed pool south of Yellow Mud Springs was boiling up to 3’ high. [generic day time] |
| 20556 |
20 Aug 1977 @ 1200 |
--- |
research-mab |
08/20/1977
The unnamed pool south of Yellow Mud seems to also have lost a little water and was splashing up to 2’ [generic day time] |
| 20557 |
05 Sep 1976 @ 1200 |
--- |
research-mab |
09/05/1976
The unnamed pool south of Yellow Mud was quite active at 0910. Splashing around to 2’ high. [generic day time] |
| 20559 |
25 Jul 1975 @ 1200 |
--- |
research-mab |
07/25/1975
Mistic, Mud and an unnamed spring south of Mud are much lower and boiling more actively. [generic day time] |