| Geyser | 1973-01-19 |
|---|---|
| Old Faithful | 0911 long, 1016 short, 1125 long, 1243 long, 1351 short, 1435 long, 1549 short, 1639 long |
| Values for Old Faithful Area | 1973-01-19 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:45 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:53 |
| Sunset | 17:14 |
| Civil Twilight End | 17:46 |
| Nautical Twilight End | 18:22 |
| Astronomical Twilight End | 18:57 |
| Moon Illumination | 99.77% |