| Geyser | 1966-06-30 |
|---|---|
| Blue | 1030 |
| Colloidal Pool | 1200 |
| Ebony | 0805 |
| Echinus | 0832, 0940, 1046, 1302, 1514, 1626, 1737 |
| Ledge | 1516 |
| Steamboat | 0800 |
| Values for Old Faithful Area | 1966-06-30 |
|---|---|
| Astronomical Twilight Begin | 03:14 |
| Nautical Twilight Begin | 04:17 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:41 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:36 |
| Astronomical Twilight End | 23:38 |
| Moon Illumination | 93.03% |