| Geyser | 1967-10-10 |
|---|---|
| Cistern Spring | 1800 |
| Harding | 0800 |
| Mud Spring | 1200 |
| Valentine | 0800 |
| Values for Old Faithful Area | 1967-10-10 |
|---|---|
| Astronomical Twilight Begin | 05:55 |
| Nautical Twilight Begin | 06:29 |
| Civil Twilight Begin | 07:02 |
| Sunrise | 07:31 |
| Sunset | 18:49 |
| Civil Twilight End | 19:18 |
| Nautical Twilight End | 19:51 |
| Astronomical Twilight End | 20:25 |
| Moon Illumination | 47.22% |