| Geyser | 1999-03-24 |
|---|---|
| Great Fountain | 0553 E, 1653 E |
| Values for Old Faithful Area | 1999-03-24 |
|---|---|
| Astronomical Twilight Begin | 04:40 |
| Nautical Twilight Begin | 05:15 |
| Civil Twilight Begin | 05:50 |
| Sunrise | 06:19 |
| Sunset | 18:40 |
| Civil Twilight End | 19:09 |
| Nautical Twilight End | 19:43 |
| Astronomical Twilight End | 20:18 |
| Moon Illumination | 48.33% |