| Date: | 2021-08-19 |
| Time: | 1421:19 |
| Geyser: | Old Faithful |
| Webcam: | Yes |
| Initial: | No |
| Long/Short: | N/A |
| Duration: | 3m21s |
| Standardized Duration: | 3m 21s |
| Time Entered: | 2021-08-19 14:21:47 |
| Time Updated: | 2021-08-19 14:32:05 |
| Time Uploaded: | 2021-08-19 14:32:05 |
| Entrant: | JarnoO |
| Observer: | |
| Submitted to: | |
| Comments: | prediction GT & NPS 1409; medium; surged to about half the eruption height almost immediately at start before dropping and commencing usual height-building |