| Geyser | 1979-04-28 |
|---|---|
| Echinus | 1330:17 |
| Values for Old Faithful Area | 1979-04-28 |
|---|---|
| Astronomical Twilight Begin | 03:25 |
| Nautical Twilight Begin | 04:07 |
| Civil Twilight Begin | 04:46 |
| Sunrise | 05:18 |
| Sunset | 19:23 |
| Civil Twilight End | 19:54 |
| Nautical Twilight End | 20:33 |
| Astronomical Twilight End | 21:16 |
| Moon Illumination | 3.74% |