| Geyser | 1931-09-14 |
|---|---|
| Ebony | 1145 |
| Pinto | 1310 |
| Values for Old Faithful Area | 1931-09-14 |
|---|---|
| Astronomical Twilight Begin | 04:20 |
| Nautical Twilight Begin | 04:56 |
| Civil Twilight Begin | 05:31 |
| Sunrise | 06:00 |
| Sunset | 18:37 |
| Civil Twilight End | 19:07 |
| Nautical Twilight End | 19:41 |
| Astronomical Twilight End | 20:17 |
| Moon Illumination | 6.65% |