| Geyser | 1977-07-07 |
|---|---|
| Colloidal Pool | 1200 |
| Echinus | 0920 |
| Hurricane Vent | 1200 |
| Ledge | 0815 |
| Whirligig | 1545, 1610 |
| Values for Old Faithful Area | 1977-07-07 |
|---|---|
| Astronomical Twilight Begin | 03:23 |
| Nautical Twilight Begin | 04:23 |
| Civil Twilight Begin | 05:10 |
| Sunrise | 05:46 |
| Sunset | 21:09 |
| Civil Twilight End | 21:46 |
| Nautical Twilight End | 22:33 |
| Astronomical Twilight End | 23:32 |
| Moon Illumination | 59.5% |