| Date: | 2006-09-04 |
| Time: | 1850 A (?) |
| Geyser: | Black Diamond |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Time Entered: | 2020-05-03 08:08:35 |
| Time Uploaded: | 2020-05-03 08:08:36 |
| Entrant: | mhreed |
| Observer: | Powell article in Transactions XII pg. 71 |
| Submitted to: | |
| Comments: | Visitor report of black mud flowing in Firehole. |