| Geyser | 1983-06-13 |
|---|---|
| Crater Spring | 1200 |
| Echinus | 1317, 1437 ie |
| Graceful | 1200 |
| Whirligig | 1200 |
| Values for Old Faithful Area | 1983-06-13 |
|---|---|
| Astronomical Twilight Begin | 03:10 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:37 |
| Sunset | 21:08 |
| Civil Twilight End | 21:45 |
| Nautical Twilight End | 22:33 |
| Astronomical Twilight End | 23:35 |
| Moon Illumination | 6.05% |