| Geyser | 1977-03-30 |
|---|---|
| Lion | 1958 |
| Values for Old Faithful Area | 1977-03-30 |
|---|---|
| Astronomical Twilight Begin | 04:27 |
| Nautical Twilight Begin | 05:03 |
| Civil Twilight Begin | 05:38 |
| Sunrise | 06:07 |
| Sunset | 18:48 |
| Civil Twilight End | 19:17 |
| Nautical Twilight End | 19:52 |
| Astronomical Twilight End | 20:28 |
| Moon Illumination | 72.71% |