| Geyser | 1999-03-25 |
|---|---|
| Great Fountain | 0328 E, 1338 E |
| Values for Old Faithful Area | 1999-03-25 |
|---|---|
| Astronomical Twilight Begin | 04:38 |
| Nautical Twilight Begin | 05:13 |
| Civil Twilight Begin | 05:48 |
| Sunrise | 06:17 |
| Sunset | 18:41 |
| Civil Twilight End | 19:10 |
| Nautical Twilight End | 19:44 |
| Astronomical Twilight End | 20:20 |
| Moon Illumination | 59.41% |