Upper Lowitz arcs Slovenia. Samo Smrke saw this display on 29th September '06 in the Prekmurje region of Slovenia. ©Samo Smrke, shown with permission.



An upper Lowitz arc is faintly visible in the unenhanced image curving upwards from the sundog towards the 22° halo region. The brightness of the central Parry arc section could also be produced by overlap with the Lowitz arc.

After unsharp masking (2) the arc becomes clearer, even the colours are apparent.

Embossing (3) enhances the arc further at the risk of adding artifacts. This view might be thought to reveal a lower Lowitz arc but the streaky clouds below the parhelion hinder a positive identification.