| Geyser | 1931-07-04 |
|---|---|
| Ebony | 0905 |
| Valentine | 1125 |
| Values for Old Faithful Area | 1931-07-04 |
|---|---|
| Astronomical Twilight Begin | 02:18 |
| Nautical Twilight Begin | 03:19 |
| Civil Twilight Begin | 04:07 |
| Sunrise | 04:43 |
| Sunset | 20:11 |
| Civil Twilight End | 20:47 |
| Nautical Twilight End | 21:35 |
| Astronomical Twilight End | 22:36 |
| Moon Illumination | 82.46% |