| Geyser | 1999-11-22 |
|---|---|
| Giantess | 0932 ns |
| Grand | 1132 E, 2123 E |
| Great Fountain | 0128 E, 1110 E, 2226 E |
| Values for Old Faithful Area | 1999-11-22 |
|---|---|
| Astronomical Twilight Begin | 05:46 |
| Nautical Twilight Begin | 06:20 |
| Civil Twilight Begin | 06:56 |
| Sunrise | 07:28 |
| Sunset | 16:50 |
| Civil Twilight End | 17:22 |
| Nautical Twilight End | 17:57 |
| Astronomical Twilight End | 18:32 |
| Moon Illumination | 98.44% |