| Date: | 2006-04-30 |
| Time: | 2203 |
| Geyser: | Mastiff |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | 30-40 seconds |
| Time Entered: | 2013-07-13 23:26:46 |
| Time Uploaded: | 2013-07-13 23:26:46 |
| Entrant: | Tara |
| Observer: | Andrew Bunning |
| Submitted to: | Geysertimes.org |
| Comments: | Mastiff started during the third minute of the hot period. After 30-40 seconds, Mastiff stopped along with all platform vents. After 2 minutes Feather restarted, Mastiff erupted again at 2208 and Giant at 2210. |