| Geyser | 1964-10-18 |
|---|---|
| Constant | 1800 |
| Dark Cavern | 1800 |
| Echinus | 1800 |
| Pinto | 1800 |
| Pinwheel | 1800 |
| Steamboat | 1125-1621 |
| Values for Old Faithful Area | 1964-10-18 |
|---|---|
| Astronomical Twilight Begin | 05:05 |
| Nautical Twilight Begin | 05:39 |
| Civil Twilight Begin | 06:13 |
| Sunrise | 06:42 |
| Sunset | 17:34 |
| Civil Twilight End | 18:03 |
| Nautical Twilight End | 18:37 |
| Astronomical Twilight End | 19:10 |
| Moon Illumination | 89.71% |