| Geyser | 1931-07-21 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1931-07-21 |
|---|---|
| Astronomical Twilight Begin | 02:44 |
| Nautical Twilight Begin | 03:38 |
| Civil Twilight Begin | 04:23 |
| Sunrise | 04:57 |
| Sunset | 20:01 |
| Civil Twilight End | 20:36 |
| Nautical Twilight End | 21:20 |
| Astronomical Twilight End | 22:14 |
| Moon Illumination | 39.51% |