| Geyser | 2000-01-15 |
|---|---|
| Grand | 0826 E, 1932 E |
| Great Fountain | 0014 E, 0954 E, 2125 E |
| Values for Old Faithful Area | 2000-01-15 |
|---|---|
| Astronomical Twilight Begin | 06:13 |
| Nautical Twilight Begin | 06:48 |
| Civil Twilight Begin | 07:24 |
| Sunrise | 07:56 |
| Sunset | 17:08 |
| Civil Twilight End | 17:41 |
| Nautical Twilight End | 18:17 |
| Astronomical Twilight End | 18:52 |
| Moon Illumination | 58.12% |