| Geyser | 1975-10-22 |
|---|---|
| Castle | 1043 |
| Old Faithful | 0828 short, 0911 long, 1126 long, 1241 short, 1333 long, 1450 short, 1540 long |
| Riverside | 0925 |
| Values for Old Faithful Area | 1975-10-22 |
|---|---|
| Astronomical Twilight Begin | 06:10 |
| Nautical Twilight Begin | 06:43 |
| Civil Twilight Begin | 07:17 |
| Sunrise | 07:47 |
| Sunset | 18:28 |
| Civil Twilight End | 18:58 |
| Nautical Twilight End | 19:32 |
| Astronomical Twilight End | 20:05 |
| Moon Illumination | 96.16% |