| Geyser | 1983-08-16 |
|---|---|
| Bear Den | 1038, 1630 |
| Blue | 1715 |
| Echinus | 1216, 1257, 1340, 1421, 1505, 1625 |
| Incline | 0928 |
| Steamboat | 1200 |
| Values for Old Faithful Area | 1983-08-16 |
|---|---|
| Astronomical Twilight Begin | 04:34 |
| Nautical Twilight Begin | 05:16 |
| Civil Twilight Begin | 05:55 |
| Sunrise | 06:27 |
| Sunset | 20:28 |
| Civil Twilight End | 20:59 |
| Nautical Twilight End | 21:38 |
| Astronomical Twilight End | 22:20 |
| Moon Illumination | 57.26% |