| Geyser | 1977-01-25 |
|---|---|
| Castle | 0930 |
| Old Faithful | 0913 long, 1028 long, 1138 long, 1247 long, 1359 long, 1519 long, 1637 long, 2000 |
| Plume | 0932 |
| Values for Old Faithful Area | 1977-01-25 |
|---|---|
| Astronomical Twilight Begin | 06:07 |
| Nautical Twilight Begin | 06:41 |
| Civil Twilight Begin | 07:17 |
| Sunrise | 07:48 |
| Sunset | 17:22 |
| Civil Twilight End | 17:54 |
| Nautical Twilight End | 18:29 |
| Astronomical Twilight End | 19:03 |
| Moon Illumination | 32% |