| Geyser | 1931-06-23 |
|---|---|
| Ebony | 1525 |
| Values for Old Faithful Area | 1931-06-23 |
|---|---|
| Astronomical Twilight Begin | 02:09 |
| Nautical Twilight Begin | 03:13 |
| Civil Twilight Begin | 04:01 |
| Sunrise | 04:38 |
| Sunset | 20:11 |
| Civil Twilight End | 20:48 |
| Nautical Twilight End | 21:37 |
| Astronomical Twilight End | 22:40 |
| Moon Illumination | 53.14% |