| Geyser | 1977-01-17 |
|---|---|
| Beehive | 1504 |
| Grand | 1559 ie |
| Old Faithful | 0916 long, 1029 short, 1142 long, 1249, 1412 long, 1527 long, 1636 long, 1742 long |
| Values for Old Faithful Area | 1977-01-17 |
|---|---|
| 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 | 18:54 |
| Moon Illumination | 6.95% |