| Geyser | 1983-04-11 |
|---|---|
| Giantess | 1307 |
| Values for Old Faithful Area | 1983-04-11 |
|---|---|
| Astronomical Twilight Begin | 04:02 |
| Nautical Twilight Begin | 04:40 |
| Civil Twilight Begin | 05:16 |
| Sunrise | 05:46 |
| Sunset | 19:02 |
| Civil Twilight End | 19:32 |
| Nautical Twilight End | 20:08 |
| Astronomical Twilight End | 20:46 |
| Moon Illumination | 4.5% |