| Geyser | 1931-08-12 |
|---|---|
| Pinto | 1510 |
| Values for Old Faithful Area | 1931-08-12 |
|---|---|
| Astronomical Twilight Begin | 03:26 |
| Nautical Twilight Begin | 04:10 |
| Civil Twilight Begin | 04:49 |
| Sunrise | 05:21 |
| Sunset | 19:34 |
| Civil Twilight End | 20:06 |
| Nautical Twilight End | 20:46 |
| Astronomical Twilight End | 21:30 |
| Moon Illumination | 3.49% |