| Geyser | 1931-08-05 |
|---|---|
| Dark Cavern | 0000 |
| Ebony | 1855 |
| Pinto | 1555 |
| Values for Old Faithful Area | 1931-08-05 |
|---|---|
| Astronomical Twilight Begin | 03:13 |
| Nautical Twilight Begin | 03:59 |
| Civil Twilight Begin | 04:41 |
| Sunrise | 05:13 |
| Sunset | 19:44 |
| Civil Twilight End | 20:17 |
| Nautical Twilight End | 20:58 |
| Astronomical Twilight End | 21:45 |
| Moon Illumination | 63.21% |