| Geyser | 1968-06-21 |
|---|---|
| Dark Cavern | 1420 |
| Ebony | 1243 |
| Echinus | 1800 |
| Ledge | 1442, 1530 |
| Little Whirligig | 1442 |
| Valentine | 0000 A |
| Values for Old Faithful Area | 1968-06-21 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 18.77% |