| Geyser | 1931-09-01 |
|---|---|
| Ebony | 1710 |
| Pinto | 1950 |
| Values for Old Faithful Area | 1931-09-01 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:39 |
| Civil Twilight Begin | 05:15 |
| Sunrise | 05:45 |
| Sunset | 19:01 |
| Civil Twilight End | 19:31 |
| Nautical Twilight End | 20:07 |
| Astronomical Twilight End | 20:46 |
| Moon Illumination | 85.14% |