| Geyser | 1966-08-28 |
|---|---|
| Beehive | 1055 |
| Blue | 0800 ie |
| Cistern Spring | 0800-1800 |
| Ebony | 1537 |
| Echinus | 0755, 0904, 1012, 1119, 1227, 1333, 1440, 1549 |
| Fireball | 1500 |
| Steamboat | 0800 |
| Values for Old Faithful Area | 1966-08-28 |
|---|---|
| Astronomical Twilight Begin | 04:55 |
| Nautical Twilight Begin | 05:34 |
| Civil Twilight Begin | 06:10 |
| Sunrise | 06:41 |
| Sunset | 20:07 |
| Civil Twilight End | 20:38 |
| Nautical Twilight End | 21:14 |
| Astronomical Twilight End | 21:53 |
| Moon Illumination | 93.11% |