| Geyser | 1987-04-17 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1987-04-17 |
|---|---|
| Astronomical Twilight Begin | 04:49 |
| Nautical Twilight Begin | 05:28 |
| Civil Twilight Begin | 06:05 |
| Sunrise | 06:36 |
| Sunset | 20:09 |
| Civil Twilight End | 20:40 |
| Nautical Twilight End | 21:17 |
| Astronomical Twilight End | 21:56 |
| Moon Illumination | 87.64% |