| Geyser | 1993-04-04 |
|---|---|
| Dome | 1200-2359 |
| Values for Old Faithful Area | 1993-04-04 |
|---|---|
| Astronomical Twilight Begin | 05:16 |
| Nautical Twilight Begin | 05:53 |
| Civil Twilight Begin | 06:28 |
| Sunrise | 06:58 |
| Sunset | 19:54 |
| Civil Twilight End | 20:23 |
| Nautical Twilight End | 20:59 |
| Astronomical Twilight End | 21:36 |
| Moon Illumination | 90.81% |