| Geyser | 1991-08-13 |
|---|---|
| Echinus | 1001, 1104, 1202, 1307, 1415, 1525 maj |
| Morning | 0047, 0423, 0800, 1128, 1518, 1937, 2318 |
| Values for Old Faithful Area | 1991-08-13 |
|---|---|
| Astronomical Twilight Begin | 04:29 |
| Nautical Twilight Begin | 05:12 |
| Civil Twilight Begin | 05:51 |
| Sunrise | 06:23 |
| Sunset | 20:32 |
| Civil Twilight End | 21:04 |
| Nautical Twilight End | 21:43 |
| Astronomical Twilight End | 22:27 |
| Moon Illumination | 13.19% |