| Geyser | 1933-08-16 |
|---|---|
| Ebony | 0610, 1315 |
| Valentine | 1020 |
| Whirligig | 0630, 0800, 0925, 1055, 1225, 1345, 1510, 1640 |
| Values for Old Faithful Area | 1933-08-16 |
|---|---|
| Astronomical Twilight Begin | 03:34 |
| Nautical Twilight Begin | 04:16 |
| Civil Twilight Begin | 04:55 |
| Sunrise | 05:27 |
| Sunset | 19:27 |
| Civil Twilight End | 19:59 |
| Nautical Twilight End | 20:38 |
| Astronomical Twilight End | 21:20 |
| Moon Illumination | 21.99% |