| Geyser | 1931-08-01 |
|---|---|
| Constant | 0000 |
| Ebony | 1030 |
| Echinus | 0000 |
| Ledge | 1405 ? |
| Minute | 0000 |
| Pinto | 0900 |
| Steamboat | 0000 |
| Vixen | 0000 |
| Whirligig | 0000 |
| Values for Old Faithful Area | 1931-08-01 |
|---|---|
| Astronomical Twilight Begin | 03:05 |
| Nautical Twilight Begin | 03:53 |
| Civil Twilight Begin | 04:36 |
| Sunrise | 05:09 |
| Sunset | 19:49 |
| Civil Twilight End | 20:23 |
| Nautical Twilight End | 21:05 |
| Astronomical Twilight End | 21:53 |
| Moon Illumination | 92.85% |