| Geyser | 1979-07-23 |
|---|---|
| Echinus | 1351, 1626 maj |
| Little Whirligig | 1023, 1325 |
| Whirligig | 1032, 1345 |
| Values for Old Faithful Area | 1979-07-23 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:41 |
| Civil Twilight Begin | 05:25 |
| Sunrise | 06:00 |
| Sunset | 20:59 |
| Civil Twilight End | 21:33 |
| Nautical Twilight End | 22:17 |
| Astronomical Twilight End | 23:09 |
| Moon Illumination | 0.65% |