Performing. . .
| Geyser: | Dark Cavern |
| Date/Time: | 1966-08-17 @ 1600 |
| Entrant: | research-mab |
| Observer: | 1966 log |
| Time Entered: | 2017-09-24 21:11:06 |
| Time Uploaded: | 2017-10-02 14:45:06 |
| Submitted to: | Geysertimes.org |
| Note: | 08/17/1966 Dark Cavern Took C&F (USGS) to watch (4pm) it and several cycles in a row were very weak – steam ceased without receiving water – Does Ledge have a weakening effect? Had been very strong before Ledge erupted. |