| Geyser | 1977-06-19 |
|---|---|
| Constant | 1246 |
| Echinus | 1227 ie, 1539 |
| Harding | 1930 |
| Valentine | 1400 |
| Whirligig | 1244, 1330, 1610 |
| Values for Old Faithful Area | 1977-06-19 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:47 |
| Nautical Twilight End | 22:36 |
| Astronomical Twilight End | 23:39 |
| Moon Illumination | 5.71% |