| Geyser | 1933-08-20 |
|---|---|
| Ebony | 1330, 1630 |
| Valentine | 1150 |
| Whirligig | 0810, 0931, 1100, 1225, 1350, 1515, 1640 |
| Values for Old Faithful Area | 1933-08-20 |
|---|---|
| Astronomical Twilight Begin | 03:41 |
| Nautical Twilight Begin | 04:22 |
| Civil Twilight Begin | 05:00 |
| Sunrise | 05:31 |
| Sunset | 19:21 |
| Civil Twilight End | 19:52 |
| Nautical Twilight End | 20:30 |
| Astronomical Twilight End | 21:11 |
| Moon Illumination | 0.95% |