| Geyser | 1999-03-14 |
|---|---|
| Great Fountain | 0718 E, 1828 E |
| Values for Old Faithful Area | 1999-03-14 |
|---|---|
| Astronomical Twilight Begin | 05:00 |
| Nautical Twilight Begin | 05:34 |
| Civil Twilight Begin | 06:08 |
| Sunrise | 06:37 |
| Sunset | 18:27 |
| Civil Twilight End | 18:56 |
| Nautical Twilight End | 19:30 |
| Astronomical Twilight End | 20:04 |
| Moon Illumination | 14.65% |