| Geyser | 1931-09-20 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1931-09-20 |
|---|---|
| Astronomical Twilight Begin | 04:28 |
| Nautical Twilight Begin | 05:04 |
| Civil Twilight Begin | 05:38 |
| Sunrise | 06:07 |
| Sunset | 18:26 |
| Civil Twilight End | 18:55 |
| Nautical Twilight End | 19:29 |
| Astronomical Twilight End | 20:05 |
| Moon Illumination | 64.73% |