| Geyser | 1967-09-11 |
|---|---|
| Mud Spring | 0800 |
| Tantalus | 1800 |
| Veteran | 0830, 0900, 1630 |
| Values for Old Faithful Area | 1967-09-11 |
|---|---|
| Astronomical Twilight Begin | 05:16 |
| Nautical Twilight Begin | 05:52 |
| Civil Twilight Begin | 06:27 |
| Sunrise | 06:57 |
| Sunset | 19:42 |
| Civil Twilight End | 20:12 |
| Nautical Twilight End | 20:47 |
| Astronomical Twilight End | 21:23 |
| Moon Illumination | 51.42% |