| Geyser | 1981-06-25 |
|---|---|
| Echinus | 1224, 1439 |
| Sunday | 1016, 1028, 1040, 1105 |
| Sunset Lake | 0930 ie |
| Veteran | 1110 |
| Whirligig | 1042 |
| Values for Old Faithful Area | 1981-06-25 |
|---|---|
| Astronomical Twilight Begin | 03:11 |
| Nautical Twilight Begin | 04:14 |
| Civil Twilight Begin | 05:03 |
| Sunrise | 05:39 |
| Sunset | 21:12 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 49.24% |