| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 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. |