| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 2727 |
15 Apr 2016 @ 1942 |
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Janet Jones |
Muddy with 5 dead cormorants being hauled off by a female coyote. Based on one bird carcass already having been fed on by ravens, maybe an eruption sometime this morning? Local visitors saw the ravens at about 0930-1000. Also - Black Diamond and Black Opal now join together with a channel of water. |
| 2515 |
10 Oct 2015 @ 2121 |
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Janet Jones |
Black Diamond and Wall Pool were all joined at the surface with gray muddy water. |
| 389 |
23 Aug 2012 @ 1642 |
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KarlH |
Black Diamond at 1642 per visitor report. Visitor Center called it out over FRS. I had just been at Biscuit 2 hrs before. Salt and Pepper had been white, now muddy and throwing rocks. Spoke with visitors who also witnessed eruption for confirmation. |
| 711 |
11 Mar 2012 @ 0000 |
11 Mar 2012 @ 2359 |
BoekelUpload |
reported to be active in last 24 hours |
| 70 |
29 Oct 2011 @ 1130 |
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Graham |
Visitors reported another eruption in the Black Diamond area ~1130 estimated 60\'. |
| 69 |
27 Oct 2011 @ 1645 |
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Graham |
Explosive eruption in the area of Black Diamond around 1645 per VR. |
| 951 |
24 Apr 2008 @ 1200 |
24 Apr 2008 @ 2359 |
BoekelUpload |
evening per Keller |
| 943 |
04 Mar 2008 @ 0000 |
04 Mar 2008 @ 2359 |
BoekelUpload |
widened runoff channel; new sediment |