| Geyser | 1979-09-11 |
|---|---|
| Bear Den | 1108 |
| Echinus | 0913 A maj, 1529 |
| Little Whirligig | 1120 |
| Values for Old Faithful Area | 1979-09-11 |
|---|---|
| Astronomical Twilight Begin | 05:16 |
| Nautical Twilight Begin | 05:53 |
| Civil Twilight Begin | 06:27 |
| Sunrise | 06:57 |
| Sunset | 19:42 |
| Civil Twilight End | 20:12 |
| Nautical Twilight End | 20:46 |
| Astronomical Twilight End | 21:23 |
| Moon Illumination | 70.8% |