| Geyser | 1978-06-27 |
|---|---|
| Dark Cavern | 1034 |
| Echinus | 1136, 1300, 1408, 1525 |
| Guardian | 1029 |
| Little Whirligig | 1320, 1505 |
| Veteran | 1035 |
| Whirligig | 0905, 1245, 1425 |
| Values for Old Faithful Area | 1978-06-27 |
|---|---|
| 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 | 52.66% |