| Date: | 2021-04-18 |
| Time: | 1515:01 |
| Geyser: | Old Faithful |
| Webcam: | Yes |
| Initial: | No |
| Long/Short: | Long |
| Duration: | 4m14s |
| Standardized Duration: | 4m 14s |
| Time Entered: | 2021-04-18 15:15:19 |
| Time Updated: | 2021-04-18 15:22:22 |
| Time Uploaded: | 2021-04-18 15:22:22 |
| Entrant: | JarnoO |
| Observer: | |
| Submitted to: | Geysertimes.org |
| Comments: | prediction GT 1511 | NPS 1508 |