| Geyser | 1999-11-02 |
|---|---|
| Giant | 0615 |
| Grand | 0759 E, 1729 E |
| Great Fountain | 0418 E, 1520 E |
| Values for Old Faithful Area | 1999-11-02 |
|---|---|
| Astronomical Twilight Begin | 05:23 |
| Nautical Twilight Begin | 05:57 |
| Civil Twilight Begin | 06:31 |
| Sunrise | 07:01 |
| Sunset | 17:11 |
| Civil Twilight End | 17:42 |
| Nautical Twilight End | 18:16 |
| Astronomical Twilight End | 18:50 |
| Moon Illumination | 31.21% |