| Geyser | 1966-08-03 |
|---|---|
| Ebony | 1445 |
| Echinus | 0822, 0932, 1040, 1149, 1301, 1409, 1521, 1635, 1746 |
| Ledge | 0800 |
| Steamboat | 1200 |
| Valentine | 0800 |
| Values for Old Faithful Area | 1966-08-03 |
|---|---|
| Astronomical Twilight Begin | 04:10 |
| Nautical Twilight Begin | 04:57 |
| Civil Twilight Begin | 05:39 |
| Sunrise | 06:12 |
| Sunset | 20:46 |
| Civil Twilight End | 21:19 |
| Nautical Twilight End | 22:01 |
| Astronomical Twilight End | 22:48 |
| Moon Illumination | 96.76% |