| Geyser | 1964-09-10 |
|---|---|
| Little Whirligig | 1800 |
| Whirligig | 1800 |
| Values for Old Faithful Area | 1964-09-10 |
|---|---|
| Astronomical Twilight Begin | 04:16 |
| Nautical Twilight Begin | 04:52 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 05:56 |
| Sunset | 18:43 |
| Civil Twilight End | 19:12 |
| Nautical Twilight End | 19:47 |
| Astronomical Twilight End | 20:24 |
| Moon Illumination | 17.94% |