| Geyser | 1981-06-24 |
|---|---|
| Echinus | 1457, 1540 |
| Sunday | 1739:21, 1747:30, 1753:14, 1808:00, 1816:17, 1900 |
| Whirligig | 1637, 1720, 1802, 1855 |
| Values for Old Faithful Area | 1981-06-24 |
|---|---|
| Astronomical Twilight Begin | 03:10 |
| Nautical Twilight Begin | 04:14 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:39 |
| Sunset | 21:12 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 60.26% |