| Geyser | 1977-02-04 |
|---|---|
| Beehive | 1653 |
| Castle | 1504 |
| Depression | 1404 |
| Grand | 1504 |
| Old Faithful | 0945 long, 1059 long, 1219 short, 1336 long, 1450 long, 1600 long, 1709 long, 1816 long |
| Values for Old Faithful Area | 1977-02-04 |
|---|---|
| Astronomical Twilight Begin | 05:58 |
| Nautical Twilight Begin | 06:32 |
| Civil Twilight Begin | 07:07 |
| Sunrise | 07:37 |
| Sunset | 17:36 |
| Civil Twilight End | 18:07 |
| Nautical Twilight End | 18:41 |
| Astronomical Twilight End | 19:15 |
| Moon Illumination | 99.99% |