| Geyser | 1931-08-07 |
|---|---|
| Ledge | 1400 |
| Pinto | 1710 |
| Values for Old Faithful Area | 1931-08-07 |
|---|---|
| Astronomical Twilight Begin | 03:17 |
| Nautical Twilight Begin | 04:02 |
| Civil Twilight Begin | 04:43 |
| Sunrise | 05:16 |
| Sunset | 19:42 |
| Civil Twilight End | 20:14 |
| Nautical Twilight End | 20:55 |
| Astronomical Twilight End | 21:41 |
| Moon Illumination | 44% |