| Date: | 2002-09-10 |
| Time: | 1334 |
| Geyser: | Fan and Mortar |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | 34 minutes |
| Standardized Duration: | 34m |
| Time Entered: | 2013-04-28 22:06:34 |
| Time Uploaded: | 2019-05-13 21:49:15 |
| Entrant: | Tara |
| Observer: | Andrew Bunning |
| Submitted to: | |
| Comments: | A steam cloud was seen from Grand indicating that a Lower Mortar minor occurred at 1247ie. River Vent started at 1311, with the first water seen in Upper Mortar 10 minutes later. Upper Mortar initiated the eruption 23 minutes after the start of River. |