| Geyser | 1933-08-15 |
|---|---|
| Ebony | 1055 |
| Valentine | 1615 |
| Whirligig | 0600, 0730, 0855, 1020, 1150, 1320, 1440, 1605 |
| Values for Old Faithful Area | 1933-08-15 |
|---|---|
| Astronomical Twilight Begin | 03:32 |
| Nautical Twilight Begin | 04:15 |
| Civil Twilight Begin | 04:54 |
| Sunrise | 05:25 |
| Sunset | 19:29 |
| Civil Twilight End | 20:01 |
| Nautical Twilight End | 20:39 |
| Astronomical Twilight End | 21:22 |
| Moon Illumination | 30.31% |