| Geyser | 1967-06-23 |
|---|---|
| Bear Den | 1640 |
| Blue | 1800 |
| Ebony | 1640 |
| Echinus | 0825 A, 0954, 1317, 1409, 1500, 1551 |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1967-06-23 |
|---|---|
| Astronomical Twilight Begin | 03:10 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 98.58% |