| Geyser | 1964-09-21 |
|---|---|
| No reports yet |
| Values for Old Faithful Area | 1964-09-21 |
|---|---|
| Astronomical Twilight Begin | 04:31 |
| Nautical Twilight Begin | 05:06 |
| Civil Twilight Begin | 05:40 |
| Sunrise | 06:09 |
| Sunset | 18:22 |
| Civil Twilight End | 18:51 |
| Nautical Twilight End | 19:25 |
| Astronomical Twilight End | 20:00 |
| Moon Illumination | 99.76% |