| Geyser | 1980-08-16 |
|---|---|
| Constant | 1150, 1549 |
| Echinus | 1039, 1540 |
| Valentine | 1922 |
| Veteran | 1540 |
| Whirligig | 0836 ie, 1319 ie, 1915 |
| Values for Old Faithful Area | 1980-08-16 |
|---|---|
| Astronomical Twilight Begin | 04:35 |
| Nautical Twilight Begin | 05:18 |
| Civil Twilight Begin | 05:56 |
| Sunrise | 06:27 |
| Sunset | 20:26 |
| Civil Twilight End | 20:58 |
| Nautical Twilight End | 21:36 |
| Astronomical Twilight End | 22:19 |
| Moon Illumination | 25.49% |