| Geyser | 1972-02-18 |
|---|---|
| Old Faithful | 0952 short, 1048 long, 1205 short, 1303 short, 1355 long, 1510 short, 1615 |
| Values for Old Faithful Area | 1972-02-18 |
|---|---|
| Astronomical Twilight Begin | 05:42 |
| Nautical Twilight Begin | 06:15 |
| Civil Twilight Begin | 06:49 |
| Sunrise | 07:19 |
| Sunset | 17:55 |
| Civil Twilight End | 18:24 |
| Nautical Twilight End | 18:58 |
| Astronomical Twilight End | 19:32 |
| Moon Illumination | 14.2% |