hued sundogs flank the sun's left and right. Wide
by Mark Trusz ( Photography
from Toronto Islands, Canada. The circular halo
is the 22° halo. Image ©Mark
shown with permission.
Sundogs, sometimes called
Sun Dogs, Parhelia or Mock Suns, are with the 22º halo,
the most frequent of the ice halos. They are most easily seen
when the sun is low. Look about 22° (outstretched
hand at arm's length) to its left and right
and at the same height. When the sun is higher they are further
away. Each 'dog' is red coloured towards the sun and
sometimes has greens and blues beyond. Sundogs can be
blindingly bright, at other times they are a mere coloured
smudge on the sky. They are visible all over the world and
at any time of year regardless of the ground level temperature.
In Europe and North America one will be seen on average twice
a week if searched for.
they form. Solar