| Geyser | 1931-08-08 |
|---|---|
| Ebony | 1605 |
| Pinto | 1650 |
| Values for Old Faithful Area | 1931-08-08 |
|---|---|
| Astronomical Twilight Begin | 03:18 |
| Nautical Twilight Begin | 04:04 |
| Civil Twilight Begin | 04:44 |
| Sunrise | 05:17 |
| Sunset | 19:40 |
| Civil Twilight End | 20:13 |
| Nautical Twilight End | 20:53 |
| Astronomical Twilight End | 21:38 |
| Moon Illumination | 34.24% |