| Geyser | 1931-05-31 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1931-05-31 |
|---|---|
| Astronomical Twilight Begin | 02:23 |
| Nautical Twilight Begin | 03:20 |
| Civil Twilight Begin | 04:06 |
| Sunrise | 04:42 |
| Sunset | 19:59 |
| Civil Twilight End | 20:34 |
| Nautical Twilight End | 21:20 |
| Astronomical Twilight End | 22:18 |
| Moon Illumination | 99.88% |