| Geyser | 1972-01-31 |
|---|---|
| Old Faithful | 0000, 1015 long, 1125 short, 1217 short, 1323 short, 1432 short, 1546 short |
| Values for Old Faithful Area | 1972-01-31 |
|---|---|
| Astronomical Twilight Begin | 06:03 |
| Nautical Twilight Begin | 06:37 |
| Civil Twilight Begin | 07:12 |
| Sunrise | 07:43 |
| Sunset | 17:30 |
| Civil Twilight End | 18:01 |
| Nautical Twilight End | 18:35 |
| Astronomical Twilight End | 19:10 |
| Moon Illumination | 99.22% |