| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 36466 |
06 Aug 2024 @ 0000 |
06 Aug 2024 @ 1600 |
Siegmund |
Comparison of photos posted online shows the pool full and overflowing on August 5th, and below the inner rim on the afternoon of August 6th. Water was slightly milky, but not brown or opaque, on the 6th. |
| 35989 |
19 Jul 2024 @ 1238 |
--- |
Tara |
Full overflowing beautiful turquoise blue nearly clear water |
| 35928 |
16 Jul 2024 @ 0620 |
16 Jul 2024 @ 0640 |
LynnS |
Pool and catch basin around it full; only a few black lumps on far east edge of basin area sticking up out of the water. Pool is blue. No discernible evidence of convection—surface of the pool is calm with no ripples |
| 35869 |
12 Jul 2024 @ 0713 |
12 Jul 2024 @ 0814 |
LynnS |
Opal Pool has refilled, overflowing out the north side of the catch basin surrounding the pool. Water is a milky blue this morning. There was no convection over the vent during the observation period. |
| 35860 |
12 Jul 2024 @ 0745 |
--- |
Ben VL |
Lynn may have more details later.
Back in overflow & calm. Water is murky but less so than yesterday evening. |
| 35850 |
11 Jul 2024 @ 2025 |
--- |
Tara |
watched for about 80 minutes, water rising slowly, still about 1.5' below overflow. one period of slight convection seen. |
| 35855 |
11 Jul 2024 @ 1715 |
11 Jul 2024 @ 1745 |
LynnS |
Water down 2-3 feet when I arrived. Water milky gray-green color. Evidence of wash on east , west, and north of the crater. Small amount of foam at east end of the crater. No convection over the vent. No change in water level the half hour I watched it. |
| 24943 |
23 Jan 2023 @ 1143 |
--- |
ypcaribou |
Multiple springs I have observed at Black Sand (Cinnamon) Midway (Opel) and Fountain (Celestine) are very low at the moment. |
| 6290 |
12 Sep 2017 @ 0730 |
--- |
TSBryan |
possibly active. surrounding platform wet, including raised places, and numerous puddles all around. |
| 2514 |
10 Oct 2015 @ 0836 |
--- |
Janet Jones |
Water at about half. A visitor said it was "way up" from yesterday. |
| 1500 |
06 Jan 2015 @ 0800 |
06 Jan 2015 @ 1700 |
MAB |
Guides reported Opal dark and murky on Jan 6 - no further information yet |
| 1494 |
26 Dec 2014 @ 1000 |
--- |
ACarlson |
A guide reported that Opal Pool is empty. |
| 1426 |
27 Sep 2014 @ 1030 |
--- |
meide |
Opel pool was full and overflowing at 1030. It was cold also, no steam on a cold and rainy day. |
| 1421 |
25 Sep 2014 @ 0800 |
--- |
udo |
Opal continues to fill. Water level at 0800 was over a foot higher than yesterday at about 1700. |
| 1417 |
24 Sep 2014 @ 1123 |
--- |
udo |
Water IS visible as of 1123 24 September 2014 |
| 1245 |
23 Sep 2014 @ 1642 |
--- |
udo |
Drained. |
| 1065 |
06 May 2014 @ 1915 |
--- |
WillBoekel |
~1915 drained |
| 16729 |
28 Sep 1998 @ 1614 |
--- |
JarnoO |
marker in place |
| 15883 |
17 Oct 1997 @ 1330 |
--- |
JarnoO |
marker in place |
| 15881 |
11 Oct 1997 @ 1425 |
--- |
JarnoO |
marker in place |
| 15310 |
21 Oct 1996 @ 1200 |
--- |
JarnoO |
{generic time}; marker in place |
| 15284 |
09 Sep 1996 @ 1330 |
--- |
JarnoO |
1' below overflow |
| 14306 |
24 May 1995 @ 0000 |
24 May 1995 @ 2359 |
JarnoO |
down 1 to 2 feet |
| 14263 |
07 Jan 1995 @ 0000 |
07 Jan 1995 @ 2359 |
JarnoO |
dormant |
| 12309 |
01 Sep 1993 @ 1455 |
--- |
JarnoO |
still marked |
| 12149 |
11 Feb 1993 @ 0830 |
--- |
JarnoO |
marks present |
| 12145 |
09 Feb 1993 @ 1600 |
--- |
JarnoO |
mark present; Opal low and turbid and stinking; runoff channels cut through snow |
| 12144 |
09 Feb 1993 @ 0900 |
--- |
JarnoO |
marked |
| 7656 |
18 Jul 1979 @ 1800 |
--- |
research-mab |
7-18-79 Opal Pool (?) having eruptions every 1-3 days. |