| Geyser | 1971-10-27 |
|---|---|
| Beehive | 0900 |
| Castle | 0830 ie |
| Old Faithful | 0845 long, 1006 long, 1114 short, 1204, 1524, 1636 |
| Values for Old Faithful Area | 1971-10-27 |
|---|---|
| Astronomical Twilight Begin | 06:16 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:23 |
| Sunrise | 07:53 |
| Sunset | 18:20 |
| Civil Twilight End | 18:50 |
| Nautical Twilight End | 19:24 |
| Astronomical Twilight End | 19:58 |
| Moon Illumination | 50.15% |