| Geyser | 1931-07-20 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1931-07-20 |
|---|---|
| Astronomical Twilight Begin | 02:43 |
| Nautical Twilight Begin | 03:37 |
| Civil Twilight Begin | 04:21 |
| Sunrise | 04:56 |
| Sunset | 20:02 |
| Civil Twilight End | 20:37 |
| Nautical Twilight End | 21:21 |
| Astronomical Twilight End | 22:15 |
| Moon Illumination | 28.54% |