| Geyser | 1933-08-19 |
|---|---|
| Ebony | 1300 |
| Valentine | 1510 |
| Whirligig | 0700, 0830, 1000, 1125, 1255, 1415, 1540, 1705 |
| Values for Old Faithful Area | 1933-08-19 |
|---|---|
| Astronomical Twilight Begin | 03:39 |
| Nautical Twilight Begin | 04:21 |
| Civil Twilight Begin | 04:59 |
| Sunrise | 05:30 |
| Sunset | 19:23 |
| Civil Twilight End | 19:54 |
| Nautical Twilight End | 20:32 |
| Astronomical Twilight End | 21:13 |
| Moon Illumination | 3.86% |