| Geyser | 1980-09-21 |
|---|---|
| Echinus | 1200 min, 1207:47, 1224-1232, 1424 min, 1432:45 |
| Little Whirligig | 1611 ie, 1800 |
| Whirligig | 1629 |
| Values for Old Faithful Area | 1980-09-21 |
|---|---|
| Astronomical Twilight Begin | 05:31 |
| Nautical Twilight Begin | 06:06 |
| Civil Twilight Begin | 06:40 |
| Sunrise | 07:09 |
| Sunset | 19:22 |
| Civil Twilight End | 19:51 |
| Nautical Twilight End | 20:25 |
| Astronomical Twilight End | 21:00 |
| Moon Illumination | 85.46% |