| Geyser | 1966-08-18 |
|---|---|
| Blue | 0845 ? |
| Ebony | 1440 |
| Echinus | 0820, 0916, 1013, 1111, 1308, 1410, 1512, 1612, 1715 |
| Harding | 1130, 1449 |
| Ledge | 1546, 1546 |
| Steamboat | 0800 |
| Values for Old Faithful Area | 1966-08-18 |
|---|---|
| Astronomical Twilight Begin | 04:38 |
| Nautical Twilight Begin | 05:20 |
| Civil Twilight Begin | 05:58 |
| Sunrise | 06:29 |
| Sunset | 20:24 |
| Civil Twilight End | 20:55 |
| Nautical Twilight End | 21:34 |
| Astronomical Twilight End | 22:16 |
| Moon Illumination | 4.69% |