| Date: | 2021-05-15 |
| Time: | 1144:54 |
| Geyser: | Old Faithful |
| Webcam: | Yes |
| Initial: | No |
| Long/Short: | Long |
| Duration: | ≥3m34s |
| Time Entered: | 2021-05-15 11:46:00 |
| Time Updated: | 2021-05-15 11:59:58 |
| Time Uploaded: | 2021-05-15 11:59:59 |
| Entrant: | JarnoO |
| Observer: | |
| Submitted to: | Geysertimes.org |
| Comments: | prediction GT 1153 | NPS 1150 |