| Geyser | 1991-08-21 |
|---|---|
| Echinus | 1030, 1130, 1231 maj |
| Giant | 0100 ie |
| Morning | 0259 E, 0658, 1053, 1448, 1850, 2248 E |
| Values for Old Faithful Area | 1991-08-21 |
|---|---|
| Astronomical Twilight Begin | 04:43 |
| Nautical Twilight Begin | 05:24 |
| Civil Twilight Begin | 06:02 |
| Sunrise | 06:32 |
| Sunset | 20:19 |
| Civil Twilight End | 20:50 |
| Nautical Twilight End | 21:28 |
| Astronomical Twilight End | 22:09 |
| Moon Illumination | 84.86% |