| Geyser | 1980-08-04 |
|---|---|
| Bear Den | 1100, 1151, 1423, 1656, 1930 |
| Echinus | 1051, 1210, 1408 |
| Little Whirligig | 1136:54, 1444:34, 1621:58, 1756:03 |
| Values for Old Faithful Area | 1980-08-04 |
|---|---|
| Astronomical Twilight Begin | 04:13 |
| Nautical Twilight Begin | 05:00 |
| Civil Twilight Begin | 05:41 |
| Sunrise | 06:14 |
| Sunset | 20:44 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 21:58 |
| Astronomical Twilight End | 22:44 |
| Moon Illumination | 41.59% |