| Geyser | 1977-09-14 |
|---|---|
| Congress Pool | 1200 |
| Constant | 1125 |
| Echinus | 0900 A |
| Grand | 0653 |
| Little Whirligig | 1130 |
| Splutter Pot | 0835 |
| Whirligig | 0835 |
| Values for Old Faithful Area | 1977-09-14 |
|---|---|
| Astronomical Twilight Begin | 05:21 |
| Nautical Twilight Begin | 05:57 |
| Civil Twilight Begin | 06:32 |
| Sunrise | 07:01 |
| Sunset | 19:36 |
| Civil Twilight End | 20:05 |
| Nautical Twilight End | 20:40 |
| Astronomical Twilight End | 21:15 |
| Moon Illumination | 0.89% |