| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 22318 |
04 Jul 2022 @ 1439 |
--- |
cb |
pool down 8" at least, calm and beautiful blue color |
| 22117 |
25 Jun 2022 @ 1133 |
--- |
cb |
calm, clear, deep blue color and same pool level as last observation. water is up to & covering the small cave on the west edge |
| 21607 |
31 May 2022 @ 1453 |
--- |
cb |
pool level also very high, up to & covering the alcove on the west edge of the pool. water is clear & calm. no boil. |
| 21329 |
16 May 2022 @ 1110 |
--- |
Tara |
Clear and blue, water level just at the overhang on the left side. |
| 21012 |
18 Apr 2022 @ 1716 |
--- |
MAB |
Clear blue in color about half full - nearly to the top of the SW cove vent but not full enough to connect with the NE sulphury vent |
| 20295 |
04 Nov 2021 @ 1225 |
--- |
MAB |
higher water than this summer - over that inner ledge but still only about half full |
| 20054 |
19 Oct 2021 @ 1404 |
--- |
cb |
pool is higher, covering the rock point. has a few small bubblers in the pool. |
| 19810 |
30 Sep 2021 @ 1235 |
--- |
cb |
Same water level. pool is emerald green in color, calm, mostly clear & steamy. #7 pool is cloudy greenish color, calm & #8 is yellowy in color with a 4" blooping boil on the edge toward Yellow Funnel spring & it is not in overflow. |
| 19607 |
16 Sep 2021 @ 1032 |
--- |
cb |
water level is ~2.5' below the rim. Water is amazingly clear, green in color and steaming |
| 19625 |
16 Sep 2021 @ 0929 |
--- |
MAB |
low - water still clear |
| 19372 |
08 Sep 2021 @ 1135 |
--- |
Tara |
Clear greenish water, calm, down 3' |
| 18506 |
18 Jul 2021 @ 1048 |
--- |
cb |
Pool has dropped another ~3". Opalescent blue with a slight yellowy tinge on the edges |
| 18327 |
09 Jul 2021 @ 1330 |
--- |
MAB |
still low low low - opalescent blue - down 3 ft - that little vent on the shelf on the NE side that would dribble sulphur into Mud is still high and dry |
| 18184 |
29 Jun 2021 @ 1323 |
--- |
cb |
no change in water level. no boil or bubbles, color is a milky opalescent blue |
| 17724 |
12 Jun 2021 @ 1620 |
--- |
MAB |
4 feet below high water marks- incredibly low |
| 17574 |
08 Jun 2021 @ 1112 |
--- |
cb |
water level up 6" since last observation. color is opalescent turquoise blue and calm |
| 17277 |
30 May 2021 @ 1554 |
--- |
cb |
very low, 1.5 - 2' below smooth water mark on the north rim. The rock outcropping that sticks out into the pool is barely covered with water. pool is a opalescent milky turquoise blue in color and calm. |
| 16395 |
10 Oct 2020 @ 1020 |
--- |
cb |
same as as last observation. Water is calm and turquoise blue. |
| 16342 |
06 Oct 2020 @ 1224 |
--- |
cb |
water level is down 2' from the rim of the pool. It is steamy, ( 65°today) clear and blue in color. Pool appears lower by a few inches than I observed last time. |
| 16271 |
26 Sep 2020 @ 1626 |
--- |
cb |
water level is about 2' down from the rim. This is about 4" down from my observation 3 weeks ago. Pool is calm, blue green in color and has no bubbles or boil |
| 13253 |
14 Aug 2019 @ 1615 |
--- |
cb |
up a tad bit but still a good 2'+ down from the rim. (not overflow) Covering the rock peninsula on the south edge inside the pool. it is a milky blue color and calm. |
| 12996 |
03 Aug 2019 @ 0839 |
--- |
cb |
down 8". greenish blue in color |
| 12970 |
02 Aug 2019 @ 0938 |
--- |
MAB |
pretty green- water level still low |
| 11023 |
20 Apr 2019 @ 1035 |
--- |
MAB |
Low, very low water, but a pretty greenish color. Clear. |
| 9967 |
31 Aug 2018 @ 1034 |
--- |
MAB |
Nearly full, well over the shelf on the east. Not quite up to the sulfur-y vents yet, but much more water. Clear, beautiful blue water |
| 9622 |
10 Aug 2018 @ 1339 |
--- |
MAB |
LOW water, clear beautiful blue. |
| 2789 |
24 Apr 2016 @ 1500 |
--- |
sfavor |
Mud Spring looked like it had a large eruption with spray approximately 30' uphill. |
| 20376 |
09 Sep 1972 @ 1200 |
--- |
research-mab |
09/09/1972
Mud Spring & “Yellow Green Pool” to the east have started to refill. [generic day time] |
| 20491 |
23 Aug 1972 @ 1200 |
--- |
research-mab |
08/23/1972
Mud Spring - water level is continuing to drop & the bubbling action in the pool is occasionally reaching up to 2 feet [generic time] |
| 7377 |
27 Oct 1967 @ 1800 |
--- |
research-mab |
10/27/1967 Chocolate Fountain – overflowing slightly. Still ebbing and flowing. Boiling mildly from both vents. |
| 7373 |
10 Oct 1967 @ 1800 |
--- |
research-mab |
10/10/1967 Chocolate Fountain – full far above pool edges. Has cut runoff channel on South, boiling mildly with water ebbing and flowing. Color is lighter brown. |
| 7366 |
27 Sep 1967 @ 1800 |
--- |
research-mab |
09/27/1967 Chocolate Fountain – no evidence of any major activity, but erosion and mud coating around the pool indicates that the pool probably fills and overflows as far as 3 ft from the normal edge of the pool. A runoff is developing to the southwest. Sections of the pool’s bank have caved in, enlarging the pool on the south, southeast, and northwest sides. |
| 7353 |
18 Sep 1967 @ 1800 |
--- |
research-mab |
09/18/1967
Chocolate Fountain appears quiet. Mud dried on the logs surrounding the pool.
Root Spring – still normal temp 164º |
| 7351 |
16 Sep 1967 @ 1800 |
--- |
research-mab |
09/16/1967 Chocolate Fountain surging over the rim. Looks as if there have been some big ones down there. |
| 7349 |
15 Sep 1967 @ 1800 |
--- |
research-mab |
09/15/1967 Chocolate Fountain water level high, fresh mud indicating large eruptions. |
| 7339 |
12 Sep 1967 @ 1800 |
--- |
research-mab |
09/12/1967 Chocolate Fountain – full and overflowing on north side. No runoff however. The pool level seems to remain static although surges of boiling still occur every two or three minutes. I don’t believe there was rain yesterday to raise the water level as much as it has risen (6 -10 inches) |
| 7326 |
11 Sep 1967 @ 0800 |
--- |
research-mab |
09/11/1967 Chocolate Fountain appears to have erupted again. Ground wet and muddy for about 10 ft on all sides. {no specfic time} |
| 7336 |
31 Aug 1967 @ 1800 |
--- |
research-mab |
08/31/1967
Chocolate Fountain seems to be slowing up. No evidence of recent large bursts this morning. I have seen no large ones in three days and have had no reports of large ones from visitors. The mud takes a long time to dry out. Mud cracks are appearing in the mud while it still appears to be quite damp. |
| 7324 |
29 Aug 1967 @ 1800 |
--- |
research-mab |
08/29/1967
Chocolate Fountain still active.
Root Spring still drained, Temp 200º |
| 7322 |
28 Aug 1967 @ 1800 |
--- |
research-mab |
08/28/1967
Chocolate Fountain – not quite as active as yesterday. |
| 7319 |
24 Aug 1967 @ 1800 |
--- |
research-mab |
08/24/1967
Chocolate Fountain still putting up strong eruptions. |
| 7317 |
22 Aug 1967 @ 0830 |
--- |
research-mab |
08/22/1967
Ed’s mud geyser shows evidence of a recent large eruption at 8:30 am. Placed 3 new markers there – uphill from geyser ranging from 5 ft to 10 ft away from pool. |
| 7337 |
21 Aug 1967 @ 1800 |
--- |
research-mab |
08/21/1967
Placed pile of dirt about 3 ft up from Ed’s mud geyser as a marker at 11:00 am. Geyser quiet at that time but showing evidence of recent burst to 7 ft from pool. Marker placed yesterday had been washed out. 5:15 pm ~ marker placed this morning washed out. |
| 7316 |
20 Aug 1967 @ 1800 |
--- |
research-mab |
08/20/1967
Ed’s mud geyser is bursting along merrily. |
| 7315 |
19 Aug 1967 @ 1800 |
--- |
research-mab |
08/19/1967
* New activity*
The “mud spring” in the Back Basin has been putting mud some 30 feet from the pool. The activity started some time early this am. Check Leigh’s maps for location #94 |