| Geyser | 2000-01-18 |
|---|---|
| Grand | 0108 E, 1256 E |
| Great Fountain | 0349 E, 1227 E, 2342 E |
| Values for Old Faithful Area | 2000-01-18 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:46 |
| Civil Twilight Begin | 07:22 |
| Sunrise | 07:54 |
| Sunset | 17:12 |
| Civil Twilight End | 17:44 |
| Nautical Twilight End | 18:20 |
| Astronomical Twilight End | 18:55 |
| Moon Illumination | 87.94% |