| Date: | 2017-10-30 |
| Time: | 2212 |
| Geyser: | Fan and Mortar |
| Webcam: | Yes |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Time Entered: | 2017-10-31 09:35:10 |
| Time Updated: | 2018-02-24 22:36:13 |
| Time Uploaded: | 2018-02-24 22:35:10 |
| Entrant: | JSJ |
| Observer: | James St. John |
| Submitted to: | Geysertimes.org |
| Comments: | Prominent steam plume in the right place. Riverside eruption at 2152. Update: Steve Eide confirmed that F&M have recently erupted, from on-site observations near noontime on 31 October. Electronic sensor first detected eruption at 2208. |