| Geyser | 1983-07-13 |
|---|---|
| Echinus | 0813, 0900 ie, 0940 |
| Giantess | 0721 |
| Splutter Pot | 0800 ie |
| Values for Old Faithful Area | 1983-07-13 |
|---|---|
| Astronomical Twilight Begin | 03:31 |
| Nautical Twilight Begin | 04:29 |
| Civil Twilight Begin | 05:15 |
| Sunrise | 05:50 |
| Sunset | 21:07 |
| Civil Twilight End | 21:42 |
| Nautical Twilight End | 22:28 |
| Astronomical Twilight End | 23:25 |
| Moon Illumination | 11.07% |