| Geyser | 1977-08-22 |
|---|---|
| Blue Mud Steam Vent | 1200 |
| Colloidal Pool | 1200 |
| Constant | 1205 A |
| Echinus | 1015 |
| Whirligig | 1200 A |
| Values for Old Faithful Area | 1977-08-22 |
|---|---|
| Astronomical Twilight Begin | 04:45 |
| Nautical Twilight Begin | 05:26 |
| Civil Twilight Begin | 06:03 |
| Sunrise | 06:34 |
| Sunset | 20:17 |
| Civil Twilight End | 20:48 |
| Nautical Twilight End | 21:25 |
| Astronomical Twilight End | 22:06 |
| Moon Illumination | 52.48% |