| Geyser | 1999-11-04 |
|---|---|
| Grand | 0532 E, 1632 E, 2359 E |
| Great Fountain | 0222 E, 1357 E |
| Values for Old Faithful Area | 1999-11-04 |
|---|---|
| Astronomical Twilight Begin | 05:25 |
| Nautical Twilight Begin | 05:59 |
| Civil Twilight Begin | 06:34 |
| Sunrise | 07:04 |
| Sunset | 17:09 |
| Civil Twilight End | 17:39 |
| Nautical Twilight End | 18:14 |
| Astronomical Twilight End | 18:48 |
| Moon Illumination | 14.05% |