| Geyser | 1933-08-18 |
|---|---|
| Ebony | 0910, 1730 |
| Valentine | 1900 |
| Whirligig | 0745, 0915, 1045, 1207, 1330, 1500, 1600 |
| Values for Old Faithful Area | 1933-08-18 |
|---|---|
| Astronomical Twilight Begin | 03:38 |
| Nautical Twilight Begin | 04:19 |
| Civil Twilight Begin | 04:58 |
| Sunrise | 05:29 |
| Sunset | 19:24 |
| Civil Twilight End | 19:55 |
| Nautical Twilight End | 20:34 |
| Astronomical Twilight End | 21:16 |
| Moon Illumination | 8.5% |