| Geyser | 1931-07-26 |
|---|---|
| Ebony | 1645 |
| Values for Old Faithful Area | 1931-07-26 |
|---|---|
| Astronomical Twilight Begin | 02:54 |
| Nautical Twilight Begin | 03:45 |
| Civil Twilight Begin | 04:28 |
| Sunrise | 05:02 |
| Sunset | 19:56 |
| Civil Twilight End | 20:30 |
| Nautical Twilight End | 21:14 |
| Astronomical Twilight End | 22:05 |
| Moon Illumination | 89.08% |