| Geyser | 1966-09-03 |
|---|---|
| Cistern Spring | 1800 |
| Echinus | 0804, 0912, 1020, 1129, 1236, 1345, 1453, 1601 |
| Harding | 0800 |
| Ledge | 0800 ie min, 1430 |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1966-09-03 |
|---|---|
| Astronomical Twilight Begin | 05:04 |
| Nautical Twilight Begin | 05:42 |
| Civil Twilight Begin | 06:18 |
| Sunrise | 06:48 |
| Sunset | 19:57 |
| Civil Twilight End | 20:26 |
| Nautical Twilight End | 21:02 |
| Astronomical Twilight End | 21:40 |
| Moon Illumination | 90.83% |