| Geyser | 1931-08-23 |
|---|---|
| Ebony | 1500 |
| Pinto | 1020 |
| Values for Old Faithful Area | 1931-08-23 |
|---|---|
| Astronomical Twilight Begin | 03:45 |
| Nautical Twilight Begin | 04:26 |
| Civil Twilight Begin | 05:03 |
| Sunrise | 05:34 |
| Sunset | 19:17 |
| Civil Twilight End | 19:48 |
| Nautical Twilight End | 20:25 |
| Astronomical Twilight End | 21:06 |
| Moon Illumination | 78.34% |