| Date: | 2020-09-15 |
| Time: | 1201 ie |
| Geyser: | Old Faithful |
| Webcam: | Yes |
| Initial: | No |
| Long/Short: | Long |
| Duration: | >2m40s |
| Standardized Duration: | >2m 40s |
| Time Entered: | 2020-09-15 12:01:27 |
| Time Updated: | 2020-09-15 12:08:14 |
| Time Uploaded: | 2020-09-15 12:08:14 |
| Entrant: | JarnoO |
| Observer: | |
| Submitted to: | |
| Comments: | prediction GT 1213 | NPS 1210; column had already dropped to a quarter or optimisitc third the eruption height |