| Geyser | 1964-07-15 |
|---|---|
| Colloidal Pool | 1000, 1200, 1201 |
| Echinus | 0827, 0935, 1046, 1321, 1408, 1521, 1631 |
| Ledge | 0800 |
| Steamboat | 1800 |
| Valentine | 0000 A, 1147, 1647 |
| Values for Old Faithful Area | 1964-07-15 |
|---|---|
| Astronomical Twilight Begin | 02:36 |
| Nautical Twilight Begin | 03:32 |
| Civil Twilight Begin | 04:17 |
| Sunrise | 04:53 |
| Sunset | 20:05 |
| Civil Twilight End | 20:40 |
| Nautical Twilight End | 21:26 |
| Astronomical Twilight End | 22:22 |
| Moon Illumination | 37.94% |