| Date: | 2019-08-04 |
| Time: | 1238 |
| Geyser: | Middle Sister |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Time Entered: | 2019-08-04 17:33:24 |
| Time Updated: | 2020-02-08 23:21:24 |
| Time Uploaded: | 2020-02-08 23:21:24 |
| Entrant: | JSJ |
| Observer: | James St. John |
| Submitted to: | Geysertimes.org |
| Comments: | 1 relatively tall burst; large blipping at 1246; blipping at 1250; 2h25m pause until the next eruption. |