| Geyser | 1936-09-30 |
|---|---|
| Giant | 1200 A |
| Values for Old Faithful Area | 1936-09-30 |
|---|---|
| Astronomical Twilight Begin | 04:43 |
| Nautical Twilight Begin | 05:17 |
| Civil Twilight Begin | 05:51 |
| Sunrise | 06:20 |
| Sunset | 18:06 |
| Civil Twilight End | 18:35 |
| Nautical Twilight End | 19:09 |
| Astronomical Twilight End | 19:43 |
| Moon Illumination | 99.47% |