| Geyser | 1931-08-04 |
|---|---|
| Dark Cavern | 0000 |
| Ebony | 1855 |
| Pinto | 1545 |
| Values for Old Faithful Area | 1931-08-04 |
|---|---|
| Astronomical Twilight Begin | 03:11 |
| Nautical Twilight Begin | 03:58 |
| Civil Twilight Begin | 04:39 |
| Sunrise | 05:12 |
| Sunset | 19:46 |
| Civil Twilight End | 20:18 |
| Nautical Twilight End | 21:00 |
| Astronomical Twilight End | 21:47 |
| Moon Illumination | 72.09% |