| Geyser | 1975-01-18 |
|---|---|
| Castle | 1402 ie |
| Fountain | 1524 |
| Grand | 1424 |
| Great Fountain | 1539 ie |
| Old Faithful | 0926 long, 1050 short, 1134 long, 1250 short, 1336 short, 1432 long, 1551 short, 1633 long, 2208 |
| Values for Old Faithful Area | 1975-01-18 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:46 |
| Civil Twilight Begin | 07:22 |
| Sunrise | 07:54 |
| Sunset | 17:12 |
| Civil Twilight End | 17:44 |
| Nautical Twilight End | 18:20 |
| Astronomical Twilight End | 18:55 |
| Moon Illumination | 28.1% |