| Geyser | 1999-11-07 |
|---|---|
| Grand | 0359 E, 1459 E |
| Great Fountain | 0352 E, 1331 E, 2219 E |
| Values for Old Faithful Area | 1999-11-07 |
|---|---|
| Astronomical Twilight Begin | 05:29 |
| Nautical Twilight Begin | 06:03 |
| Civil Twilight Begin | 06:37 |
| Sunrise | 07:08 |
| Sunset | 17:05 |
| Civil Twilight End | 17:36 |
| Nautical Twilight End | 18:10 |
| Astronomical Twilight End | 18:44 |
| Moon Illumination | 0.72% |