| Geyser | 1931-07-09 |
|---|---|
| Ebony | 1120 |
| Pinto | 1625 |
| Values for Old Faithful Area | 1931-07-09 |
|---|---|
| Astronomical Twilight Begin | 02:24 |
| Nautical Twilight Begin | 03:24 |
| Civil Twilight Begin | 04:11 |
| Sunrise | 04:47 |
| Sunset | 20:09 |
| Civil Twilight End | 20:45 |
| Nautical Twilight End | 21:32 |
| Astronomical Twilight End | 22:31 |
| Moon Illumination | 37.69% |