| Geyser | 1966-08-16 |
|---|---|
| Cistern Spring | 0900 |
| Ebony | 1400 |
| Echinus | 0947, 1041, 1132, 1233, 1327, 1422, 1516, 1610 |
| Harding | 1445 |
| Ledge | 1725 |
| Steamboat | 0900 |
| Valentine | 1507 |
| Values for Old Faithful Area | 1966-08-16 |
|---|---|
| Astronomical Twilight Begin | 04:34 |
| Nautical Twilight Begin | 05:17 |
| Civil Twilight Begin | 05:55 |
| Sunrise | 06:27 |
| Sunset | 20:27 |
| Civil Twilight End | 20:59 |
| Nautical Twilight End | 21:38 |
| Astronomical Twilight End | 22:20 |
| Moon Illumination | 0.09% |