| Geyser | 1977-04-04 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1977-04-04 |
|---|---|
| Astronomical Twilight Begin | 04:16 |
| Nautical Twilight Begin | 04:53 |
| Civil Twilight Begin | 05:28 |
| Sunrise | 05:58 |
| Sunset | 18:54 |
| Civil Twilight End | 19:23 |
| Nautical Twilight End | 19:59 |
| Astronomical Twilight End | 20:35 |
| Moon Illumination | 99.98% |