| Geyser | 1966-09-04 |
|---|---|
| Cistern Spring | 0800 |
| Echinus | 0745 A, 0831, 0924, 1018, 1113, 1209, 1305, 1455, 1549, 1653, 1800 |
| Harding | 0800 |
| Ledge | 0800 ie |
| Steamboat | 0800-1030 |
| Values for Old Faithful Area | 1966-09-04 |
|---|---|
| Astronomical Twilight Begin | 05:06 |
| Nautical Twilight Begin | 05:43 |
| Civil Twilight Begin | 06:19 |
| Sunrise | 06:49 |
| Sunset | 19:55 |
| Civil Twilight End | 20:25 |
| Nautical Twilight End | 21:00 |
| Astronomical Twilight End | 21:38 |
| Moon Illumination | 84.58% |