| Geyser | 1972-12-31 |
|---|---|
| Old Faithful | 0157, 0240, 0353, 0501, 0918, 1021, 1131, 1240 |
| Values for Old Faithful Area | 1972-12-31 |
|---|---|
| Astronomical Twilight Begin | 06:14 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:59 |
| Sunset | 16:53 |
| Civil Twilight End | 17:26 |
| Nautical Twilight End | 18:03 |
| Astronomical Twilight End | 18:38 |
| Moon Illumination | 16.4% |