| Geyser | 1931-09-23 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1931-09-23 |
|---|---|
| Astronomical Twilight Begin | 04:32 |
| Nautical Twilight Begin | 05:07 |
| Civil Twilight Begin | 05:41 |
| Sunrise | 06:10 |
| Sunset | 18:20 |
| Civil Twilight End | 18:49 |
| Nautical Twilight End | 19:23 |
| Astronomical Twilight End | 19:58 |
| Moon Illumination | 89% |