| Geyser | 1967-09-16 |
|---|---|
| Mud Spring | 1200 |
| Veteran | 0800, 0800 |
| Values for Old Faithful Area | 1967-09-16 |
|---|---|
| Astronomical Twilight Begin | 05:23 |
| Nautical Twilight Begin | 05:59 |
| Civil Twilight Begin | 06:33 |
| Sunrise | 07:02 |
| Sunset | 19:33 |
| Civil Twilight End | 20:02 |
| Nautical Twilight End | 20:37 |
| Astronomical Twilight End | 21:12 |
| Moon Illumination | 94.16% |