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
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.