| Geyser | 1979-06-30 |
|---|---|
| Colloidal Pool | 1200 |
| Congress Pool | 1200 |
| Echinus | 0921:57, 1221:48 |
| Rubble | 1200 |
| Steamboat | 1200 |
| Whirligig | 1355 |
| Values for Old Faithful Area | 1979-06-30 |
|---|---|
| Astronomical Twilight Begin | 03:14 |
| Nautical Twilight Begin | 04:16 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:41 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:36 |
| Astronomical Twilight End | 23:38 |
| Moon Illumination | 28.02% |