| Geyser | 1971-10-25 |
|---|---|
| Castle | 1330 |
| Lion | 1010 |
| Little Cub | 0950 |
| Old Faithful | 0932 long, 1043 short, 1131 long, 1348 long, 1502 short, 1557 long |
| Values for Old Faithful Area | 1971-10-25 |
|---|---|
| Astronomical Twilight Begin | 06:13 |
| Nautical Twilight Begin | 06:47 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:50 |
| Sunset | 18:23 |
| Civil Twilight End | 18:53 |
| Nautical Twilight End | 19:27 |
| Astronomical Twilight End | 20:01 |
| Moon Illumination | 29.8% |