| Geyser | 1975-02-01 |
|---|---|
| Old Faithful | 0923 short, 1007 long, 1123 short, 1223 long, 1341 short, 1434 long, 1549 short, 1636 long, 1800 short |
| Values for Old Faithful Area | 1975-02-01 |
|---|---|
| Astronomical Twilight Begin | 06:02 |
| Nautical Twilight Begin | 06:36 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:42 |
| Sunset | 17:31 |
| Civil Twilight End | 18:02 |
| Nautical Twilight End | 18:37 |
| Astronomical Twilight End | 19:11 |
| Moon Illumination | 71.42% |