| Geyser | 1966-09-06 |
|---|---|
| Cistern Spring | 1600 |
| Echinus | 0746, 0846, 1539, 1636 |
| Steamboat | 0800 |
| Values for Old Faithful Area | 1966-09-06 |
|---|---|
| Astronomical Twilight Begin | 05:09 |
| Nautical Twilight Begin | 05:46 |
| Civil Twilight Begin | 06:22 |
| Sunrise | 06:51 |
| Sunset | 19:51 |
| Civil Twilight End | 20:21 |
| Nautical Twilight End | 20:56 |
| Astronomical Twilight End | 21:33 |
| Moon Illumination | 68.19% |