| Geyser | 1977-09-07 |
|---|---|
| Constant | 1425, 1743 |
| Echinus | 1154, 1506 |
| Little Whirligig | 1403, 1735 |
| Splutter Pot | 1750 A |
| Whirligig | 1435, 1750 |
| Values for Old Faithful Area | 1977-09-07 |
|---|---|
| Astronomical Twilight Begin | 05:11 |
| Nautical Twilight Begin | 05:48 |
| Civil Twilight Begin | 06:23 |
| Sunrise | 06:53 |
| Sunset | 19:49 |
| Civil Twilight End | 20:18 |
| Nautical Twilight End | 20:54 |
| Astronomical Twilight End | 21:31 |
| Moon Illumination | 34.61% |