| Date: | 2017-12-04 |
| Time: | 1105 ie |
| Geyser: | Castle |
| Webcam: | Yes |
| Initial: | No |
| Major/Minor: | Major |
| Duration: | |
| Time Entered: | 2017-12-04 19:52:13 |
| Time Updated: | 2017-12-04 20:24:15 |
| Time Uploaded: | 2017-12-04 20:23:10 |
| Entrant: | JSJ |
| Observer: | James St. John |
| Submitted to: | Geysertimes.org |
| Comments: | Probably near start. Off-camera, but unmistakeable eruption steam plume first visible on web camera at 1105. |