| Geyser | 1991-02-04 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1991-02-04 |
|---|---|
| Astronomical Twilight Begin | 05:59 |
| Nautical Twilight Begin | 06:33 |
| Civil Twilight Begin | 07:07 |
| Sunrise | 07:38 |
| Sunset | 17:36 |
| Civil Twilight End | 18:06 |
| Nautical Twilight End | 18:41 |
| Astronomical Twilight End | 19:15 |
| Moon Illumination | 71.92% |