| Geyser | 1977-02-12 |
|---|---|
| Beehive | 1430 |
| Castle | 1437 |
| Depression | 1322 |
| Old Faithful | 0725 long, 0838 long, 0945 long, 1101 long, 1215, 1327 long, 1447 long, 1554 long, 1704 short, 1758 long, 1912 long |
| Values for Old Faithful Area | 1977-02-12 |
|---|---|
| Astronomical Twilight Begin | 05:49 |
| Nautical Twilight Begin | 06:23 |
| Civil Twilight Begin | 06:57 |
| Sunrise | 07:27 |
| Sunset | 17:48 |
| Civil Twilight End | 18:17 |
| Nautical Twilight End | 18:52 |
| Astronomical Twilight End | 19:25 |
| Moon Illumination | 37.29% |