| Geyser | 1979-07-09 |
|---|---|
| Constant | 1030 |
| Echinus | 0855 ie, 1010, 1129, 1404 |
| Fireball | 1045 |
| Little Whirligig | 1020 |
| Orby | 0903 |
| Veteran | 1050, 1150 |
| Values for Old Faithful Area | 1979-07-09 |
|---|---|
| Astronomical Twilight Begin | 03:25 |
| Nautical Twilight Begin | 04:24 |
| Civil Twilight Begin | 05:11 |
| Sunrise | 05:47 |
| Sunset | 21:09 |
| Civil Twilight End | 21:45 |
| Nautical Twilight End | 22:32 |
| Astronomical Twilight End | 23:31 |
| Moon Illumination | 99.49% |