| Geyser | 1973-02-04 |
|---|---|
| Castle | 0910 |
| Old Faithful | 0957 short, 1040 long, 1155 short, 1238 long, 1350 short, 1447 long, 1553 short, 1708 |
| Values for Old Faithful Area | 1973-02-04 |
|---|---|
| Astronomical Twilight Begin | 05:58 |
| Nautical Twilight Begin | 06:32 |
| Civil Twilight Begin | 07:07 |
| Sunrise | 07:37 |
| Sunset | 17:36 |
| Civil Twilight End | 18:07 |
| Nautical Twilight End | 18:41 |
| Astronomical Twilight End | 19:15 |
| Moon Illumination | 0.87% |