| Geyser | 1977-08-25 |
|---|---|
| Constant | 1045, 1205 |
| Echinus | 1439 |
| Little Whirligig | 1135 |
| Monarch | 0840 |
| Palpitator Spring | 0840, 0840 |
| Whirligig | 1035, 1145 |
| Values for Old Faithful Area | 1977-08-25 |
|---|---|
| Astronomical Twilight Begin | 04:50 |
| Nautical Twilight Begin | 05:30 |
| Civil Twilight Begin | 06:07 |
| Sunrise | 06:38 |
| Sunset | 20:12 |
| Civil Twilight End | 20:42 |
| Nautical Twilight End | 21:20 |
| Astronomical Twilight End | 21:59 |
| Moon Illumination | 83.87% |