| Geyser | 1975-12-25 |
|---|---|
| Castle | 1550 |
| Depression | 1251 |
| Lone Star | 1210 |
| Old Faithful | 0939 long, 1100 long, 1215 short, 1322 long, 1439 short, 1529 long |
| Riverside | 1215 |
| Values for Old Faithful Area | 1975-12-25 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:47 |
| Civil Twilight Begin | 07:24 |
| Sunrise | 07:58 |
| Sunset | 16:48 |
| Civil Twilight End | 17:21 |
| Nautical Twilight End | 17:58 |
| Astronomical Twilight End | 18:34 |
| Moon Illumination | 53.89% |