| Geyser | 1931-08-22 |
|---|---|
| Ebony | 1530 |
| Pinto | 1030 |
| Values for Old Faithful Area | 1931-08-22 |
|---|---|
| Astronomical Twilight Begin | 03:44 |
| Nautical Twilight Begin | 04:24 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:33 |
| Sunset | 19:19 |
| Civil Twilight End | 19:49 |
| Nautical Twilight End | 20:27 |
| Astronomical Twilight End | 21:08 |
| Moon Illumination | 69.15% |