| Geyser | 1936-08-31 |
|---|---|
| Echinus | 1200 |
| Values for Old Faithful Area | 1936-08-31 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:38 |
| Civil Twilight Begin | 05:14 |
| Sunrise | 05:44 |
| Sunset | 19:02 |
| Civil Twilight End | 19:32 |
| Nautical Twilight End | 20:08 |
| Astronomical Twilight End | 20:46 |
| Moon Illumination | 97.88% |