| Date: | 2018-06-07 |
| Time: | 1815 |
| Geyser: | Mugwump |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Time Entered: | 2018-06-07 19:32:14 |
| Time Updated: | 2018-06-29 16:29:23 |
| Time Uploaded: | 2018-06-29 16:29:16 |
| Entrant: | JSJ |
| Observer: | James St. John |
| Submitted to: | |
| Comments: | Eruption from 1815 to 1816. Two bursts, with thumps. See attachment. |
| https://www.flickr.com/photos/jsjgeology/42330438074 | Photo (1 of 2) of Mugwump Geyser's 6:15 to 6:16 PM eruption on 7 June 2018. |