| Geyser | 1971-02-08 |
|---|---|
| Castle | 1210 |
| Old Faithful | 0105 short, 1007 short, 1158 long |
| Riverside | 1300 |
| Values for Old Faithful Area | 1971-02-08 |
|---|---|
| Astronomical Twilight Begin | 05:54 |
| Nautical Twilight Begin | 06:28 |
| Civil Twilight Begin | 07:03 |
| Sunrise | 07:33 |
| Sunset | 17:41 |
| Civil Twilight End | 18:11 |
| Nautical Twilight End | 18:46 |
| Astronomical Twilight End | 19:20 |
| Moon Illumination | 96.17% |