| Geyser | 1931-08-26 |
|---|---|
| Ebony | 0720 |
| Pinto | 1420 |
| Values for Old Faithful Area | 1931-08-26 |
|---|---|
| Astronomical Twilight Begin | 03:50 |
| Nautical Twilight Begin | 04:30 |
| Civil Twilight Begin | 05:07 |
| Sunrise | 05:38 |
| Sunset | 19:12 |
| Civil Twilight End | 19:42 |
| Nautical Twilight End | 20:19 |
| Astronomical Twilight End | 20:59 |
| Moon Illumination | 96.77% |