| Geyser | 1981-02-04 |
|---|---|
| Giantess | 0800 ie |
| Values for Old Faithful Area | 1981-02-04 |
|---|---|
| Astronomical Twilight Begin | 05:58 |
| Nautical Twilight Begin | 06:32 |
| Civil Twilight Begin | 07:07 |
| Sunrise | 07:37 |
| Sunset | 17:36 |
| Civil Twilight End | 18:07 |
| Nautical Twilight End | 18:42 |
| Astronomical Twilight End | 19:15 |
| Moon Illumination | 0.51% |