| Geyser | 1990-09-30 |
|---|---|
| Colloidal Pool | 1200 |
| Giant | 1525 |
| Values for Old Faithful Area | 1990-09-30 |
|---|---|
| Astronomical Twilight Begin | 05:43 |
| Nautical Twilight Begin | 06:17 |
| Civil Twilight Begin | 06:51 |
| Sunrise | 07:19 |
| Sunset | 19:06 |
| Civil Twilight End | 19:35 |
| Nautical Twilight End | 20:09 |
| Astronomical Twilight End | 20:43 |
| Moon Illumination | 79.33% |