| Geyser | 1981-10-08 |
|---|---|
| Giantess | 0328 |
| Values for Old Faithful Area | 1981-10-08 |
|---|---|
| Astronomical Twilight Begin | 05:53 |
| Nautical Twilight Begin | 06:27 |
| Civil Twilight Begin | 07:00 |
| Sunrise | 07:29 |
| Sunset | 18:51 |
| Civil Twilight End | 19:20 |
| Nautical Twilight End | 19:54 |
| Astronomical Twilight End | 20:28 |
| Moon Illumination | 68.77% |