| Geyser | 1977-01-04 |
|---|---|
| Castle | 1130 |
| Little Cub | 1441 |
| Old Faithful | 0940 long, 1048 long, 1159 long, 1308 long, 1427 long, 1531, 1642 |
| Values for Old Faithful Area | 1977-01-04 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:50 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:59 |
| Sunset | 16:57 |
| Civil Twilight End | 17:30 |
| Nautical Twilight End | 18:06 |
| Astronomical Twilight End | 18:42 |
| Moon Illumination | 98.53% |