| Geyser | 1999-03-11 |
|---|---|
| Great Fountain | 0613 E, 1928 E |
| Values for Old Faithful Area | 1999-03-11 |
|---|---|
| Astronomical Twilight Begin | 05:06 |
| Nautical Twilight Begin | 05:40 |
| Civil Twilight Begin | 06:14 |
| Sunrise | 06:42 |
| Sunset | 18:23 |
| Civil Twilight End | 18:52 |
| Nautical Twilight End | 19:26 |
| Astronomical Twilight End | 20:00 |
| Moon Illumination | 41.16% |