| Geyser | 1931-08-13 |
|---|---|
| Ebony | 1100 |
| Pinto | 1650 |
| Values for Old Faithful Area | 1931-08-13 |
|---|---|
| Astronomical Twilight Begin | 03:28 |
| Nautical Twilight Begin | 04:11 |
| Civil Twilight Begin | 04:51 |
| Sunrise | 05:22 |
| Sunset | 19:33 |
| Civil Twilight End | 20:05 |
| Nautical Twilight End | 20:44 |
| Astronomical Twilight End | 21:28 |
| Moon Illumination | 0.48% |