| Geyser | 1979-08-31 |
|---|---|
| Arsenic | 1622 ie |
| Cistern Spring | 1200 |
| Constant | 1153 |
| Echinus | 1114 maj, 1401 |
| Porkchop | 0930 ie |
| Values for Old Faithful Area | 1979-08-31 |
|---|---|
| Astronomical Twilight Begin | 04:59 |
| Nautical Twilight Begin | 05:38 |
| Civil Twilight Begin | 06:14 |
| Sunrise | 06:44 |
| Sunset | 20:02 |
| Civil Twilight End | 20:32 |
| Nautical Twilight End | 21:09 |
| Astronomical Twilight End | 21:47 |
| Moon Illumination | 55.28% |