| Geyser | 1981-01-21 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1981-01-21 |
|---|---|
| Astronomical Twilight Begin | 06:10 |
| Nautical Twilight Begin | 06:44 |
| Civil Twilight Begin | 07:20 |
| Sunrise | 07:52 |
| Sunset | 17:17 |
| Civil Twilight End | 17:49 |
| Nautical Twilight End | 18:24 |
| Astronomical Twilight End | 18:59 |
| Moon Illumination | 98.89% |