| Geyser | 1977-01-24 |
|---|---|
| Castle | 1419 ie |
| Dome | 1410 |
| Grand | 1229 ie |
| Old Faithful | 0830, 0935 long, 1051, 1201, 1319 short, 1421 short, 1520 long, 1632 long, 1740 |
| Values for Old Faithful Area | 1977-01-24 |
|---|---|
| Astronomical Twilight Begin | 06:08 |
| Nautical Twilight Begin | 06:42 |
| Civil Twilight Begin | 07:18 |
| Sunrise | 07:49 |
| Sunset | 17:21 |
| Civil Twilight End | 17:52 |
| Nautical Twilight End | 18:28 |
| Astronomical Twilight End | 19:02 |
| Moon Illumination | 23.25% |