| Date: | 2025-05-22 |
| Time: | 0858 ie |
| Geyser: | UNNG-OSG-12 |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Time Entered: | 2025-05-22 09:57:47 |
| Time Uploaded: | 2025-05-22 09:57:48 |
| Entrant: | TSBryan |
| Observer: | |
| Submitted to: | GeyserTimes for Android |
| Comments: | "Concussion Geyser" 0858ie, 0922ie, and 0930, so erupting about every 18-22 minutes, duration roughly 2 minutes, heights up to 10 feet. Two concussions heard at start of 0930 eruption. |