| Geyser | 1983-06-20 |
|---|---|
| Cauliflower | 0800-1800, 1738, 1746 |
| Crater Spring | 1200 |
| Steamboat | 1200 |
| Values for Old Faithful Area | 1983-06-20 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:47 |
| Nautical Twilight End | 22:36 |
| Astronomical Twilight End | 23:39 |
| Moon Illumination | 75.3% |