| Geyser | 1991-08-08 |
|---|---|
| Echinus | 1015, 1115, 1225, 1325, 1441, 1547 maj |
| Ledge Spring | 1500 |
| Minute | 1830 |
| Steamboat | 1800 |
| Values for Old Faithful Area | 1991-08-08 |
|---|---|
| Astronomical Twilight Begin | 04:19 |
| Nautical Twilight Begin | 05:05 |
| Civil Twilight Begin | 05:45 |
| Sunrise | 06:17 |
| Sunset | 20:39 |
| Civil Twilight End | 21:12 |
| Nautical Twilight End | 21:52 |
| Astronomical Twilight End | 22:37 |
| Moon Illumination | 5.06% |