| Geyser | 1966-07-16 |
|---|---|
| Bear Den | 0800 ? |
| Blue | 1550 |
| Ebony | 0800 ? |
| Echinus | 0851, 1006, 1123, 1238, 1356, 1512, 1630 |
| Ledge | 1715 |
| Scummy Pool | 1800 |
| Steamboat | 0800 |
| Valentine | 1705 |
| Values for Old Faithful Area | 1966-07-16 |
|---|---|
| Astronomical Twilight Begin | 03:37 |
| Nautical Twilight Begin | 04:32 |
| Civil Twilight Begin | 05:18 |
| Sunrise | 05:53 |
| Sunset | 21:05 |
| Civil Twilight End | 21:40 |
| Nautical Twilight End | 22:25 |
| Astronomical Twilight End | 23:21 |
| Moon Illumination | 5.07% |