| Geyser | 1966-08-27 |
|---|---|
| Blue | 1305 ie |
| Cistern Spring | 0800 |
| Echinus | 0823, 0927, 1034, 1141, 1245, 1355, 1504, 1609, 1716 |
| Ledge | 0815 |
| Scummy Pool | 1800 |
| Steamboat | 0800-1430 |
| Values for Old Faithful Area | 1966-08-27 |
|---|---|
| Astronomical Twilight Begin | 04:53 |
| Nautical Twilight Begin | 05:32 |
| Civil Twilight Begin | 06:09 |
| Sunrise | 06:39 |
| Sunset | 20:09 |
| Civil Twilight End | 20:39 |
| Nautical Twilight End | 21:16 |
| Astronomical Twilight End | 21:56 |
| Moon Illumination | 87.37% |