| Geyser | 1964-08-21 |
|---|---|
| Bear Den | 0415 |
| Ebony | 1150 maj |
| Echinus | 0743, 0847, 0948, 1307, 1407, 1514 |
| Little Whirligig | 1015-1035 |
| Steamboat | 0920 |
| Sunday | 0710 |
| Valentine | 0000 A |
| Values for Old Faithful Area | 1964-08-21 |
|---|---|
| Astronomical Twilight Begin | 03:44 |
| Nautical Twilight Begin | 04:25 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:33 |
| Sunset | 19:19 |
| Civil Twilight End | 19:49 |
| Nautical Twilight End | 20:27 |
| Astronomical Twilight End | 21:08 |
| Moon Illumination | 96.22% |