| Geyser | 1971-02-27 |
|---|---|
| New | 1000 |
| Old Faithful | 0940 short, 1022 long, 1146 short |
| Riverside | 1015, 1645 |
| Values for Old Faithful Area | 1971-02-27 |
|---|---|
| Astronomical Twilight Begin | 05:27 |
| Nautical Twilight Begin | 06:01 |
| Civil Twilight Begin | 06:35 |
| Sunrise | 07:04 |
| Sunset | 18:07 |
| Civil Twilight End | 18:36 |
| Nautical Twilight End | 19:10 |
| Astronomical Twilight End | 19:44 |
| Moon Illumination | 5.38% |