| Geyser | 1983-08-18 |
|---|---|
| Bear Den | 1305 |
| Echinus | 0805, 0837 |
| Lone Pine | 0659 maj, 0908 min, 1137 |
| Steamvalve Spring | 0758 ie |
| Veteran | 1200 |
| Values for Old Faithful Area | 1983-08-18 |
|---|---|
| Astronomical Twilight Begin | 04:38 |
| Nautical Twilight Begin | 05:19 |
| Civil Twilight Begin | 05:58 |
| Sunrise | 06:29 |
| Sunset | 20:24 |
| Civil Twilight End | 20:56 |
| Nautical Twilight End | 21:34 |
| Astronomical Twilight End | 22:16 |
| Moon Illumination | 75.86% |