| Geyser | 1931-08-03 |
|---|---|
| Dark Cavern | 1000 |
| Ebony | 1035 |
| Pinto | 1530 |
| Values for Old Faithful Area | 1931-08-03 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 03:56 |
| Civil Twilight Begin | 04:38 |
| Sunrise | 05:11 |
| Sunset | 19:47 |
| Civil Twilight End | 20:20 |
| Nautical Twilight End | 21:01 |
| Astronomical Twilight End | 21:49 |
| Moon Illumination | 80.15% |