| Geyser | 1972-02-20 |
|---|---|
| Old Faithful | 0959 long, 1109 long, 1213 long, 1325 short, 1413 long, 1530 short, 1616 long, 1725 |
| Values for Old Faithful Area | 1972-02-20 |
|---|---|
| Astronomical Twilight Begin | 05:39 |
| Nautical Twilight Begin | 06:12 |
| Civil Twilight Begin | 06:46 |
| Sunrise | 07:16 |
| Sunset | 17:58 |
| Civil Twilight End | 18:27 |
| Nautical Twilight End | 19:01 |
| Astronomical Twilight End | 19:35 |
| Moon Illumination | 33.84% |