| Geyser | 1991-06-20 |
|---|---|
| Echinus | 0850, 0943, 1025, 1205, 1243, 1330 min, 1345, 1441, 1525 maj, 1630 |
| Vixen | 1309 |
| Values for Old Faithful Area | 1991-06-20 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:36 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 61.21% |