| Geyser | 1964-09-12 |
|---|---|
| Echinus | 1800 |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1964-09-12 |
|---|---|
| Astronomical Twilight Begin | 04:19 |
| Nautical Twilight Begin | 04:55 |
| Civil Twilight Begin | 05:29 |
| Sunrise | 05:59 |
| Sunset | 18:39 |
| Civil Twilight End | 19:08 |
| Nautical Twilight End | 19:43 |
| Astronomical Twilight End | 20:19 |
| Moon Illumination | 35.02% |