| Geyser | 1968-07-20 |
|---|---|
| Ebony | 0635 A |
| Echinus | 0655-0745, 0725, 0758, 0838, 0935, 1013, 1210, 1249, 1408, 1710, 1800 |
| Steamboat | 0800 |
| Values for Old Faithful Area | 1968-07-20 |
|---|---|
| Astronomical Twilight Begin | 03:45 |
| Nautical Twilight Begin | 04:38 |
| Civil Twilight Begin | 05:23 |
| Sunrise | 05:57 |
| Sunset | 21:01 |
| Civil Twilight End | 21:36 |
| Nautical Twilight End | 22:20 |
| Astronomical Twilight End | 23:14 |
| Moon Illumination | 24.05% |