| Geyser | 1987-03-31 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1987-03-31 |
|---|---|
| Astronomical Twilight Begin | 04:26 |
| Nautical Twilight Begin | 05:02 |
| Civil Twilight Begin | 05:37 |
| Sunrise | 06:06 |
| Sunset | 18:48 |
| Civil Twilight End | 19:18 |
| Nautical Twilight End | 19:52 |
| Astronomical Twilight End | 20:29 |
| Moon Illumination | 3.6% |