| Geyser | 1991-06-27 |
|---|---|
| Echinus | 0900, 0950 maj, 1130, 1155, 1245, 1341, 1430, 1523, 1610 |
| Vixen | 1435 |
| Whirligig | 1430 |
| Values for Old Faithful Area | 1991-06-27 |
|---|---|
| Astronomical Twilight Begin | 03:12 |
| Nautical Twilight Begin | 04:15 |
| Civil Twilight Begin | 05:03 |
| Sunrise | 05:40 |
| Sunset | 21:12 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 99.99% |