| Geyser | 1966-06-27 |
|---|---|
| Blue | 0800 ie |
| Dark Cavern | 1830, 2015 |
| Ebony | 1035, 1450 |
| Echinus | 0828, 0925, 1024, 1123, 1223, 1323, 1523, 1623, 1721 |
| Ledge | 0913 |
| Steamboat | 0800 |
| Valentine | 2045 A |
| Veteran | 2010 |
| Values for Old Faithful Area | 1966-06-27 |
|---|---|
| Astronomical Twilight Begin | 03:12 |
| Nautical Twilight Begin | 04:15 |
| Civil Twilight Begin | 05:03 |
| Sunrise | 05:40 |
| Sunset | 21:12 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 68.57% |