| Geyser | 1981-05-04 |
|---|---|
| Giantess | 0830 ie |
| Values for Old Faithful Area | 1981-05-04 |
|---|---|
| Astronomical Twilight Begin | 04:11 |
| Nautical Twilight Begin | 04:56 |
| Civil Twilight Begin | 05:36 |
| Sunrise | 06:08 |
| Sunset | 20:31 |
| Civil Twilight End | 21:03 |
| Nautical Twilight End | 21:43 |
| Astronomical Twilight End | 22:28 |
| Moon Illumination | 0.01% |