| Geyser | 1964-09-29 |
|---|---|
| Echinus | 1800 |
| Steamboat | 1950 |
| Values for Old Faithful Area | 1964-09-29 |
|---|---|
| Astronomical Twilight Begin | 04:42 |
| Nautical Twilight Begin | 05:16 |
| Civil Twilight Begin | 05:50 |
| Sunrise | 06:19 |
| Sunset | 18:07 |
| Civil Twilight End | 18:36 |
| Nautical Twilight End | 19:10 |
| Astronomical Twilight End | 19:44 |
| Moon Illumination | 42.47% |