| Geyser | 2000-02-19 |
|---|---|
| Grand | 0356 E, 1735 E |
| Great Fountain | 1110 E, 2203 E |
| Values for Old Faithful Area | 2000-02-19 |
|---|---|
| Astronomical Twilight Begin | 05:40 |
| Nautical Twilight Begin | 06:14 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:17 |
| Sunset | 17:56 |
| Civil Twilight End | 18:26 |
| Nautical Twilight End | 19:00 |
| Astronomical Twilight End | 19:33 |
| Moon Illumination | 99.8% |