| Geyser | 1979-08-01 |
|---|---|
| Echinus | 0850 A, 1005, 1425:03 |
| Little Whirligig | 1535 |
| Whirligig | 0905, 1305 |
| Values for Old Faithful Area | 1979-08-01 |
|---|---|
| Astronomical Twilight Begin | 04:06 |
| Nautical Twilight Begin | 04:54 |
| Civil Twilight Begin | 05:36 |
| Sunrise | 06:09 |
| Sunset | 20:49 |
| Civil Twilight End | 21:22 |
| Nautical Twilight End | 22:04 |
| Astronomical Twilight End | 22:52 |
| Moon Illumination | 50.15% |