| Geyser | 1964-05-18 |
|---|---|
| Harding | 2315 ? |
| Steamboat | 0800 |
| Values for Old Faithful Area | 1964-05-18 |
|---|---|
| Astronomical Twilight Begin | 02:42 |
| Nautical Twilight Begin | 03:34 |
| Civil Twilight Begin | 04:17 |
| Sunrise | 04:52 |
| Sunset | 19:47 |
| Civil Twilight End | 20:21 |
| Nautical Twilight End | 21:05 |
| Astronomical Twilight End | 21:56 |
| Moon Illumination | 47.51% |