| Geyser | 1980-07-31 |
|---|---|
| Colloidal Pool | 1200 |
| Echinus | 1200 A, 1232 |
| Values for Old Faithful Area | 1980-07-31 |
|---|---|
| Astronomical Twilight Begin | 04:06 |
| Nautical Twilight Begin | 04:54 |
| Civil Twilight Begin | 05:36 |
| Sunrise | 06:09 |
| Sunset | 20:49 |
| Civil Twilight End | 21:22 |
| Nautical Twilight End | 22:04 |
| Astronomical Twilight End | 22:53 |
| Moon Illumination | 84.33% |