| Geyser | 1979-09-12 |
|---|---|
| Constant | 1147 |
| Echinus | 1510 |
| Little Whirligig | 1111 |
| Porkchop | 0945 ie |
| Veteran | 1525 |
| Whirligig | 0920 ie |
| Values for Old Faithful Area | 1979-09-12 |
|---|---|
| Astronomical Twilight Begin | 05:18 |
| Nautical Twilight Begin | 05:54 |
| Civil Twilight Begin | 06:29 |
| Sunrise | 06:58 |
| Sunset | 19:40 |
| Civil Twilight End | 20:10 |
| Nautical Twilight End | 20:44 |
| Astronomical Twilight End | 21:21 |
| Moon Illumination | 60.57% |