| Geyser | 1931-07-02 |
|---|---|
| Ebony | 0815 |
| Values for Old Faithful Area | 1931-07-02 |
|---|---|
| Astronomical Twilight Begin | 02:16 |
| Nautical Twilight Begin | 03:17 |
| Civil Twilight Begin | 04:06 |
| Sunrise | 04:42 |
| Sunset | 20:11 |
| Civil Twilight End | 20:48 |
| Nautical Twilight End | 21:36 |
| Astronomical Twilight End | 22:37 |
| Moon Illumination | 94.6% |