| Geyser | 1977-06-22 |
|---|---|
| Constant | 0938, 1140 A, 1405 |
| Echinus | 1032 |
| Little Whirligig | 0920 ie, 1105 ie, 1520 |
| Porkchop | 0835 ie |
| Whirligig | 0935 A, 1300, 1345, 1445, 1553 |
| Values for Old Faithful Area | 1977-06-22 |
|---|---|
| Astronomical Twilight Begin | 03:10 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 26.7% |