Performing duty. . .
| Geyser: | Dark Cavern |
| Date/Time: | 1976-09-09 @ 1800 |
| Entrant: | research-mab |
| Observer: | 1976 log |
| Time Entered: | 2017-08-22 17:21:23 |
| Time Uploaded: | 2017-10-02 14:45:06 |
| Submitted to: | |
| Note: | 09/09/1976 Dark Cavern was observed for a period of about 40 minutes last night. It was found that the interval between eruptions was nearly always 7 ½ minutes with eruptions lasting between 5 & 6 minutes. Nearly half of the eruption time was taken up by minor play, with a forceful blast of water lasting around 3 minutes. |