| Geyser | 1987-04-13 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1987-04-13 |
|---|---|
| Astronomical Twilight Begin | 04:57 |
| Nautical Twilight Begin | 05:36 |
| Civil Twilight Begin | 06:12 |
| Sunrise | 06:42 |
| Sunset | 20:04 |
| Civil Twilight End | 20:34 |
| Nautical Twilight End | 21:11 |
| Astronomical Twilight End | 21:49 |
| Moon Illumination | 99.12% |