| Geyser | 1974-08-02 |
|---|---|
| Constant | 1145 |
| Echinus | 1110, 1430, 1604, 1736 |
| Ledge | 1557 |
| Valentine | 0930 A, 0935, 1601, 1607 |
| Values for Old Faithful Area | 1974-08-02 |
|---|---|
| Astronomical Twilight Begin | 04:08 |
| Nautical Twilight Begin | 04:56 |
| Civil Twilight Begin | 05:38 |
| Sunrise | 06:11 |
| Sunset | 20:47 |
| Civil Twilight End | 21:20 |
| Nautical Twilight End | 22:02 |
| Astronomical Twilight End | 22:50 |
| Moon Illumination | 99.26% |