| Geyser | 1979-07-13 |
|---|---|
| Africa | 1800 |
| Echinus | 0945, 1607:26 |
| Fireball | 1050 |
| Little Whirligig | 1030 |
| Veteran | 0900-1030 |
| Values for Old Faithful Area | 1979-07-13 |
|---|---|
| Astronomical Twilight Begin | 03:31 |
| Nautical Twilight Begin | 04:29 |
| Civil Twilight Begin | 05:15 |
| Sunrise | 05:50 |
| Sunset | 21:07 |
| Civil Twilight End | 21:42 |
| Nautical Twilight End | 22:28 |
| Astronomical Twilight End | 23:26 |
| Moon Illumination | 83.78% |