| Geyser | 1931-09-17 |
|---|---|
| Ebony | 1042 |
| Values for Old Faithful Area | 1931-09-17 |
|---|---|
| Astronomical Twilight Begin | 04:24 |
| Nautical Twilight Begin | 05:00 |
| Civil Twilight Begin | 05:34 |
| Sunrise | 06:03 |
| Sunset | 18:32 |
| Civil Twilight End | 19:01 |
| Nautical Twilight End | 19:35 |
| Astronomical Twilight End | 20:11 |
| Moon Illumination | 33.21% |