| Date: | 2021-07-15 |
| Time: | 1338:50 |
| Geyser: | Old Faithful |
| Webcam: | Yes |
| Initial: | No |
| Long/Short: | Long |
| Duration: | 4m22s |
| Standardized Duration: | 4m 22s |
| Time Entered: | 2021-07-15 13:39:13 |
| Time Updated: | 2021-07-15 13:47:34 |
| Time Uploaded: | 2021-07-15 13:47:35 |
| Entrant: | JarnoO |
| Observer: | |
| Submitted to: | Geysertimes.org |
| Comments: | prediction GT 1326 | NPS 1333; large preplay 1330:04 d=20s |