| Geyser | 1933-08-31 |
|---|---|
| Ebony | 1240 |
| Valentine | 0700 |
| Whirligig | 0620, 0750, 0910, 1035, 1205, 1335, 1505, 1630 |
| Values for Old Faithful Area | 1933-08-31 |
|---|---|
| Astronomical Twilight Begin | 03:59 |
| Nautical Twilight Begin | 04:38 |
| Civil Twilight Begin | 05:14 |
| Sunrise | 05:44 |
| Sunset | 19:02 |
| Civil Twilight End | 19:32 |
| Nautical Twilight End | 20:08 |
| Astronomical Twilight End | 20:47 |
| Moon Illumination | 80.78% |