| Geyser | 1931-09-12 |
|---|---|
| Ebony | 0810 |
| Values for Old Faithful Area | 1931-09-12 |
|---|---|
| Astronomical Twilight Begin | 04:17 |
| Nautical Twilight Begin | 04:53 |
| Civil Twilight Begin | 05:28 |
| Sunrise | 05:57 |
| Sunset | 18:41 |
| Civil Twilight End | 19:10 |
| Nautical Twilight End | 19:45 |
| Astronomical Twilight End | 20:22 |
| Moon Illumination | 0.02% |