| Geyser | 1987-10-17 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1987-10-17 |
|---|---|
| Astronomical Twilight Begin | 06:04 |
| Nautical Twilight Begin | 06:37 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:40 |
| Sunset | 18:36 |
| Civil Twilight End | 19:06 |
| Nautical Twilight End | 19:39 |
| Astronomical Twilight End | 20:13 |
| Moon Illumination | 27.33% |