| Geyser | 1966-07-04 |
|---|---|
| Arsenic | 0925 ie |
| Cistern Spring | 1740 |
| Ebony | 1058, 1615, 1833 |
| Echinus | 0915, 1032, 1148, 1306, 1423, 1538 |
| Fireball | 0925 ie |
| Ledge | 1950 ie |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1966-07-04 |
|---|---|
| Astronomical Twilight Begin | 03:19 |
| Nautical Twilight Begin | 04:20 |
| Civil Twilight Begin | 05:07 |
| Sunrise | 05:44 |
| Sunset | 21:11 |
| Civil Twilight End | 21:47 |
| Nautical Twilight End | 22:35 |
| Astronomical Twilight End | 23:36 |
| Moon Illumination | 97.9% |