| Geyser | 1975-01-28 |
|---|---|
| Castle | 1014 |
| Grand | 1317 |
| Old Faithful | 0801 long, 0911 short, 0957 long, 1119 long, 1225 long, 1341 long, 1447 long, 1556 short, 1656 long |
| Values for Old Faithful Area | 1975-01-28 |
|---|---|
| Astronomical Twilight Begin | 06:05 |
| Nautical Twilight Begin | 06:39 |
| Civil Twilight Begin | 07:15 |
| Sunrise | 07:46 |
| Sunset | 17:26 |
| Civil Twilight End | 17:57 |
| Nautical Twilight End | 18:32 |
| Astronomical Twilight End | 19:06 |
| Moon Illumination | 99.32% |