| Date: | 2006-05-28 |
| Time: | 0747 |
| Geyser: | Giant Hot Period |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | 8m50s |
| Standardized Duration: | 8m 50s |
| Time Entered: | 2013-07-14 00:43:06 |
| Time Updated: | 2013-07-14 00:44:13 |
| Time Uploaded: | 2019-05-13 21:48:34 |
| Entrant: | Tara |
| Observer: | Tara Cross |
| Submitted to: | |
| Comments: | Mastiff surged 5 feet. |