| Geyser | 1977-03-25 |
|---|---|
| Grand | 1557 ie |
| Lion | 1608 |
| Values for Old Faithful Area | 1977-03-25 |
|---|---|
| Astronomical Twilight Begin | 04:37 |
| Nautical Twilight Begin | 05:13 |
| Civil Twilight Begin | 05:47 |
| Sunrise | 06:16 |
| Sunset | 18:41 |
| Civil Twilight End | 19:10 |
| Nautical Twilight End | 19:45 |
| Astronomical Twilight End | 20:20 |
| Moon Illumination | 25.96% |