| Geyser | 1964-08-23 |
|---|---|
| Echinus | 0731, 0848, 1007, 1121, 1247, 1407, 1527, 1647 |
| Ledge | 0710 |
| Steamboat | 0735 |
| Sunday | 1800 |
| Valentine | 0958 |
| Values for Old Faithful Area | 1964-08-23 |
|---|---|
| Astronomical Twilight Begin | 03:47 |
| Nautical Twilight Begin | 04:27 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:35 |
| Sunset | 19:15 |
| Civil Twilight End | 19:46 |
| Nautical Twilight End | 20:23 |
| Astronomical Twilight End | 21:03 |
| Moon Illumination | 100% |