| Geyser | 1931-07-11 |
|---|---|
| Ebony | 1443 |
| Values for Old Faithful Area | 1931-07-11 |
|---|---|
| Astronomical Twilight Begin | 02:27 |
| Nautical Twilight Begin | 03:26 |
| Civil Twilight Begin | 04:12 |
| Sunrise | 04:48 |
| Sunset | 20:08 |
| Civil Twilight End | 20:44 |
| Nautical Twilight End | 21:30 |
| Astronomical Twilight End | 22:29 |
| Moon Illumination | 19.89% |