| Geyser | 1980-10-16 |
|---|---|
| Emerald Spring | 1200 |
| Steamboat | 1200 |
| Values for Old Faithful Area | 1980-10-16 |
|---|---|
| Astronomical Twilight Begin | 06:03 |
| Nautical Twilight Begin | 06:37 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:40 |
| Sunset | 18:37 |
| Civil Twilight End | 19:06 |
| Nautical Twilight End | 19:40 |
| Astronomical Twilight End | 20:13 |
| Moon Illumination | 40.71% |