| Geyser | 1983-08-02 |
|---|---|
| Blue | 1540 |
| Crater Spring | 1800 |
| Echinus | 1043, 1121 |
| Incline | 1734, 1829 |
| Whirligig | 1428, 1530, 1637, 2112 |
| Values for Old Faithful Area | 1983-08-02 |
|---|---|
| Astronomical Twilight Begin | 04:08 |
| Nautical Twilight Begin | 04:56 |
| Civil Twilight Begin | 05:37 |
| Sunrise | 06:11 |
| Sunset | 20:48 |
| Civil Twilight End | 21:21 |
| Nautical Twilight End | 22:02 |
| Astronomical Twilight End | 22:50 |
| Moon Illumination | 47.87% |