| Geyser | 1931-05-01 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1931-05-01 |
|---|---|
| Astronomical Twilight Begin | 03:19 |
| Nautical Twilight Begin | 04:03 |
| Civil Twilight Begin | 04:42 |
| Sunrise | 05:14 |
| Sunset | 19:26 |
| Civil Twilight End | 19:58 |
| Nautical Twilight End | 20:37 |
| Astronomical Twilight End | 21:21 |
| Moon Illumination | 98.79% |