| Date: | 1973-03-12 |
| Time: | 1809 |
| Geyser: | Guardian |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | |
| Time Entered: | 2017-09-08 07:18:25 |
| Time Uploaded: | 2017-10-02 14:28:44 |
| Entrant: | research-mab |
| Observer: | 1973 log R.Hutchinson |
| Submitted to: | |
| Comments: | water phase 1m55s continuous steam phase lasted approx 3 min. At 1818 Guardian began having vigorous puffs of steam from its vent as if it were going to play again. However a second eruption did not materialize and the puffing gradually decreased but being stronger when Dark Cavern began each one of its periods of minor play |