| Geyser | 1975-02-02 |
|---|---|
| Old Faithful | 0842 long, 0950 long, 1100 short, 1151 long, 1303 long, 1417 long, 1520 long, 1627 long |
| Values for Old Faithful Area | 1975-02-02 |
|---|---|
| Astronomical Twilight Begin | 06:01 |
| Nautical Twilight Begin | 06:35 |
| Civil Twilight Begin | 07:10 |
| Sunrise | 07:40 |
| Sunset | 17:33 |
| Civil Twilight End | 18:04 |
| Nautical Twilight End | 18:38 |
| Astronomical Twilight End | 19:12 |
| Moon Illumination | 60.79% |