| Geyser | 1981-08-27 |
|---|---|
| Morning | 0430, 1342 |
| Sunday | 1600, 1647:40, 1701:14, 1712:40, 1721:56, 1731:42, 1740:37, 1749:59, 1758:44 |
| Values for Old Faithful Area | 1981-08-27 |
|---|---|
| Astronomical Twilight Begin | 04:54 |
| Nautical Twilight Begin | 05:33 |
| Civil Twilight Begin | 06:10 |
| Sunrise | 06:40 |
| Sunset | 20:09 |
| Civil Twilight End | 20:39 |
| Nautical Twilight End | 21:16 |
| Astronomical Twilight End | 21:55 |
| Moon Illumination | 6.49% |