| Geyser | 1977-02-19 |
|---|---|
| Beehive | 1201 |
| Grand | 1113, 1851 ie |
| Old Faithful | 0824, 0944 long, 1101 long, 1212 short, 1314 long, 1437 short, 1529 long, 1642 long, 1747 long, 1902 long, 2023 long |
| Values for Old Faithful Area | 1977-02-19 |
|---|---|
| Astronomical Twilight Begin | 05:39 |
| Nautical Twilight Begin | 06:13 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:16 |
| Sunset | 17:57 |
| Civil Twilight End | 18:27 |
| Nautical Twilight End | 19:01 |
| Astronomical Twilight End | 19:34 |
| Moon Illumination | 1.45% |