| Geyser | 1975-01-27 |
|---|---|
| Castle | 1350, 2137 ie |
| Grand | 1247 |
| Grotto Fountain | 1347 |
| Old Faithful | 0920 short, 1008 long, 1131 short, 1215 long, 1334 short, 1426 long, 1546 long, 1921 long, 2031 short, 2130 long, 2249 |
| Values for Old Faithful Area | 1975-01-27 |
|---|---|
| Astronomical Twilight Begin | 06:06 |
| Nautical Twilight Begin | 06:40 |
| Civil Twilight Begin | 07:16 |
| Sunrise | 07:47 |
| Sunset | 17:24 |
| Civil Twilight End | 17:56 |
| Nautical Twilight End | 18:31 |
| Astronomical Twilight End | 19:05 |
| Moon Illumination | 99.83% |