| Geyser | 2000-01-30 |
|---|---|
| Grand | 0032 E, 1144 E, 2159 E |
| Great Fountain | 0531 E, 1435 E |
| Values for Old Faithful Area | 2000-01-30 |
|---|---|
| Astronomical Twilight Begin | 06:04 |
| Nautical Twilight Begin | 06:38 |
| Civil Twilight Begin | 07:13 |
| Sunrise | 07:44 |
| Sunset | 17:28 |
| Civil Twilight End | 17:59 |
| Nautical Twilight End | 18:34 |
| Astronomical Twilight End | 19:09 |
| Moon Illumination | 31.78% |