| Geyser | 1972-01-20 |
|---|---|
| Old Faithful | 1010 long, 1123 short, 1224 long, 1331 short, 1446 short, 1530 short, 1641 |
| Values for Old Faithful Area | 1972-01-20 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:45 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:53 |
| Sunset | 17:15 |
| Civil Twilight End | 17:47 |
| Nautical Twilight End | 18:22 |
| Astronomical Twilight End | 18:57 |
| Moon Illumination | 17.38% |