| Geyser | 1979-04-10 |
|---|---|
| Echinus | 1800 |
| Values for Old Faithful Area | 1979-04-10 |
|---|---|
| Astronomical Twilight Begin | 04:04 |
| Nautical Twilight Begin | 04:42 |
| Civil Twilight Begin | 05:18 |
| Sunrise | 05:48 |
| Sunset | 19:01 |
| Civil Twilight End | 19:30 |
| Nautical Twilight End | 20:06 |
| Astronomical Twilight End | 20:44 |
| Moon Illumination | 95% |