Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
35650 |
30 Jun 2024 @ 1819 |
30 Jun 2024 @ 1830 |
Janet Jones |
The edge of Abyss Pool appeared to have fewer microbes than earlier this morning. Lots of small bits of microbes floating in the water. Bubbles along the edge in three places, larger bubbles rising from the center. I saw good welling up of water. Based on how much the wash area had dried on this windy afternoon, I would guess that the surge that happened might have occurred sometime in the previous 24-36 hours from tonight’s observation. The last time I saw this behavior, the color was blue. It wouldn’t surprise me to see Abyss clear up this week and turn green or even blue with how fast things can shift at West Thumb. |
35638 |
30 Jun 2024 @ 1122 |
--- |
Janet Jones |
Overflowing not only from the typical channel by the little catch basin, but also in a gap in the sinter on the far long side. Damp soil all the way to King Geyser might indicate significant cycling. Never seen this in 19 years of observing. The gap in the sinter was there as of May 10, 2024. I’ll check photos from previous years. Still dark in color with some microbes sloughing off. |
35512 |
24 Jun 2024 @ 0854 |
--- |
Craigmon99 |
Still blackish. A bit clearer than last year. 4 inches from overflow |
35491 |
23 Jun 2024 @ 1047 |
--- |
Janet Jones |
Abyss is 2-3" below overflow (the catch basin by the overflow point is full of water now and with microbe growth) with sections of the microbe mat lining the crater starting to slough off. |
34817 |
01 Jun 2024 @ 1356 |
--- |
Janet Jones |
While still looking quite black, the water level has risen a bit since my last visit a couple of weeks ago. The water is just beginning to fill the catch basin near the point of overflow. Water was a few inches above the line of microbes. The ephemeral spring up by the parking lot (across the boardwalk from "Fake Fumarole") doesn't appear to have sent water down under the boardwalk all the way to Abyss and Black Pool this year. (Or at least since access to West Thumb this year) That's a help. |
34502 |
10 May 2024 @ 1331 |
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Janet Jones |
Water level is about a foot below overflow and is black in color.. |
28583 |
30 Sep 2023 @ 0945 |
--- |
Janet Jones |
Only a couple of inches below overflow and good sized chunks of the microbes lining the crater are sloughing off. |
27898 |
01 Sep 2023 @ 1324 |
--- |
Graham |
Water level has risen to a few inches below overflow. Steaming, seems hotter than in the spring. Ranger said it has been slowly rising this summer and was about an inch higher recently. |
26938 |
08 Jul 2023 @ 1649 |
--- |
nails |
Still close to a foot below overflow. Very dark green. |
26916 |
08 Jul 2023 @ 1152 |
--- |
Janet Jones |
Water has risen to about 6 inches below overflow. Still black in color, but chunks of microbes have started to slough off the walls of the crater. Welling up of water plus small circular currents seen on the surface of the water. |
26536 |
20 Jun 2023 @ 1934 |
--- |
Craigmon99 |
About a foot below overflow. Dark water. Not very hot. Extra creepy to be around. |
25389 |
12 May 2023 @ 1130 |
--- |
Janet Jones |
About 2 feet below overflow- inky green color |
24052 |
24 Sep 2022 @ 1335 |
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Art |
Boardwalk still closed at Twin and Big Cone. Mostly likely will remain closed for rest of season. |
23548 |
03 Sep 2022 @ 1500 |
--- |
Graham |
Boardwalk closed from Big Cone to the Twin boardwalk Junction. The middle boardwalk is open. |
23360 |
23 Aug 2022 @ 0908 |
--- |
Craigmon99 |
Unable to view due to ongoing crime scene. |
23204 |
15 Aug 2022 @ 1555 |
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steve |
The water level is a bit higher, perhaps 5 inches below overflow. |
22911 |
28 Jul 2022 @ 1054 |
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rbwhitaker |
Water about 8 inches below overflow and steaming. |
21691 |
03 Jun 2022 @ 1216 |
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ge |
2 ft below crest |
21264 |
13 May 2022 @ 1500 |
--- |
Tara |
Bluish water, water level down ~2.5 feet. |
19715 |
24 Sep 2021 @ 0757 |
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SteveO |
Down about 2 feet below the rim. |
19269 |
04 Sep 2021 @ 0926 |
--- |
Janet Jones |
Below overflow. Steam rising 6-10 feet above ground level at 46 degrees F. |
17938 |
20 Jun 2021 @ 0716 |
--- |
K.Cooper |
2 feet below rim, surface temp about 120F |
17604 |
09 Jun 2021 @ 1400 |
--- |
Tara |
Water level still down, temp still cool with darker bacteria in the pool. |
16462 |
28 Oct 2020 @ 1129 |
--- |
Janet Jones |
Green with a hint of blue to the green. Yellow microbes in the little catch basin by the main overflow channel and shallow ledge. |
16431 |
15 Oct 2020 @ 1412 |
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jonp |
Clear blue-green color; slight overflow. |
15363 |
04 Aug 2020 @ 1130 |
--- |
Janet Jones |
Clear blue - vent is very visible at the bottom. Steady bubbles rising in one spot along the edge closest to the boardwalk that runs along the long side of the pool. |
14991 |
15 Jul 2020 @ 1035 |
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Janet Jones |
Back to clear and blue-green color - vent is clearly visible and it’s overflowing. Rangers Julie, Luz and Carley said it cleared up about three weeks ago. Bubbles were seen rising along the edge, but none seen from the center of the pool. |
14780 |
29 Jun 2020 @ 1344 |
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bhoppe |
Pool was full and blue. Overflowing in multiple spots with some bubbles rising to the surface near the boardwalk. |
14779 |
29 Jun 2020 @ 1030 |
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User34 |
Blue and hot. Ranger said it had heated to 170F in the course of a couple weeks |
14207 |
18 May 2020 @ 1318 |
--- |
Janet Jones |
A couple of inches below overflow. Dark green - looks possibly muddy from ephemeral spring up top (across from "Fake Fumarole" - behind the old road) that flows into it every since the boardwalk was replaced. Is that mud plugging it up? |
20796 |
16 May 2020 @ 1543 |
--- |
Janet Jones |
Not in overflow - as seen from a flight over the park. Time per camera data (not 100% sure that it's correct). |
13342 |
21 Aug 2019 @ 1130 |
--- |
Janet Jones |
Yellow microbes lining the crater now have a mottled appearance. Color of the pool is now a lighter green than on my last visit earlier this month. |
12506 |
16 Jul 2019 @ 1045 |
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Janet Jones |
Green with a few chunks of microbe mat lifting. Vent is visible. |
11206 |
10 May 2019 @ 1304 |
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Janet Jones |
Orange microbes lining the crater. Zero bubbles seen. |
9155 |
12 Jul 2018 @ 1310 |
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bhoppe |
Pool has assumed a green-blue hue. Very clear to see deep into the pool. |
7713 |
15 Oct 2017 @ 1620 |
--- |
Janet Jones |
Definitely has cooled. Definitely more green than blue. Still can clearly see the bottom of the crater. |
4286 |
09 Jun 2017 @ 1030 |
--- |
Janet Jones |
Boardwalk being moved there, but you can still walk the outer loop of boardwalk at West Thumb. Abyss looked a touch more blue than on the 4th - still more of a teal color. Bubbles occasionally rising in a few spots. |
3876 |
13 Oct 2016 @ 1044 |
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Janet Jones |
While it's still a dark green, it is nice to see bubbles rising at one point along the edge closest to the main boardwalk loop. Also a few bubbles rose in the middle of the pool. |
3614 |
11 Jun 1992 @ 0800 |
--- |
bhoppe |
Time or details not noted, but 6/11/1992 is noted as the "last known eruption" of Abyss Pool. |