| Geyser | 1968-07-28 |
|---|---|
| Ebony | 0000 A, 1300 A |
| Echinus | 0916, 1035, 1150, 1327, 1403, 1519, 1555 |
| Fan-Norris | 1615 |
| Ledge | 0000 A |
| Values for Old Faithful Area | 1968-07-28 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:49 |
| Civil Twilight Begin | 05:32 |
| Sunrise | 06:06 |
| Sunset | 20:53 |
| Civil Twilight End | 21:26 |
| Nautical Twilight End | 22:09 |
| Astronomical Twilight End | 22:59 |
| Moon Illumination | 7.98% |