| Geyser | 1971-03-10 |
|---|---|
| Grand | 1220 |
| Values for Old Faithful Area | 1971-03-10 |
|---|---|
| Astronomical Twilight Begin | 05:08 |
| Nautical Twilight Begin | 05:42 |
| Civil Twilight Begin | 06:16 |
| Sunrise | 06:45 |
| Sunset | 18:22 |
| Civil Twilight End | 18:51 |
| Nautical Twilight End | 19:24 |
| Astronomical Twilight End | 19:58 |
| Moon Illumination | 97.09% |