| Geyser | 1979-04-06 |
|---|---|
| Echinus | 1517 maj |
| Values for Old Faithful Area | 1979-04-06 |
|---|---|
| Astronomical Twilight Begin | 04:13 |
| Nautical Twilight Begin | 04:50 |
| Civil Twilight Begin | 05:25 |
| Sunrise | 05:55 |
| Sunset | 18:56 |
| Civil Twilight End | 19:25 |
| Nautical Twilight End | 20:01 |
| Astronomical Twilight End | 20:38 |
| Moon Illumination | 67.38% |