| Geyser | 1931-08-15 |
|---|---|
| Ebony | 1050 |
| Pinto | 1545 |
| Values for Old Faithful Area | 1931-08-15 |
|---|---|
| Astronomical Twilight Begin | 03:31 |
| Nautical Twilight Begin | 04:14 |
| Civil Twilight Begin | 04:53 |
| Sunrise | 05:25 |
| Sunset | 19:30 |
| Civil Twilight End | 20:01 |
| Nautical Twilight End | 20:40 |
| Astronomical Twilight End | 21:23 |
| Moon Illumination | 3.01% |