| Date: | 1977-09-11 |
| Time: | 0605 |
| Geyser: | Grand |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Grand Code: | -2-+1 |
| Time Entered: | 2021-11-05 14:26:17 |
| Time Uploaded: | 2021-11-05 14:26:17 |
| Entrant: | mhreed |
| Observer: | Hutchinson (1977) annual report |
| Submitted to: | |
| Comments: | OFVC logs confirm AM time. From pg. 27: "Two eruptions in September this year had after-bursts...One was on September 11th during the 06:05:20 MDT eruption when a third burst followed a pause of 8 minutes and 24 seconds." |