| Geyser | 1967-08-17 |
|---|---|
| Arsenic | 1430 |
| Ebony | 1520 |
| Fan-Norris | 1200, 1520, 1702 |
| Values for Old Faithful Area | 1967-08-17 |
|---|---|
| Astronomical Twilight Begin | 04:36 |
| Nautical Twilight Begin | 05:18 |
| Civil Twilight Begin | 05:56 |
| Sunrise | 06:28 |
| Sunset | 20:26 |
| Civil Twilight End | 20:58 |
| Nautical Twilight End | 21:36 |
| Astronomical Twilight End | 22:18 |
| Moon Illumination | 91.32% |