| Geyser | 1977-02-15 |
|---|---|
| Beehive | 0847 |
| Old Faithful | 0854, 1006, 1116 long, 1231 long, 1340 short, 1437 long, 1556 short |
| Values for Old Faithful Area | 1977-02-15 |
|---|---|
| Astronomical Twilight Begin | 05:45 |
| Nautical Twilight Begin | 06:18 |
| Civil Twilight Begin | 06:53 |
| Sunrise | 07:22 |
| Sunset | 17:52 |
| Civil Twilight End | 18:21 |
| Nautical Twilight End | 18:55 |
| Astronomical Twilight End | 19:29 |
| Moon Illumination | 9.63% |