| Geyser | 1981-03-21 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1981-03-21 |
|---|---|
| Astronomical Twilight Begin | 04:45 |
| Nautical Twilight Begin | 05:20 |
| Civil Twilight Begin | 05:55 |
| Sunrise | 06:23 |
| Sunset | 18:36 |
| Civil Twilight End | 19:05 |
| Nautical Twilight End | 19:39 |
| Astronomical Twilight End | 20:14 |
| Moon Illumination | 99.58% |