| Geyser | 1981-07-02 |
|---|---|
| Constant | 1000 |
| Dark Cavern | 0917 |
| Echinus | 1050, 1243, 1340, 1615 |
| Sunday | 0834, 0843 |
| Values for Old Faithful Area | 1981-07-02 |
|---|---|
| Astronomical Twilight Begin | 03:17 |
| Nautical Twilight Begin | 04:18 |
| Civil Twilight Begin | 05:06 |
| Sunrise | 05:43 |
| Sunset | 21:11 |
| Civil Twilight End | 21:47 |
| Nautical Twilight End | 22:35 |
| Astronomical Twilight End | 23:37 |
| Moon Illumination | 0.28% |