UK halo display 9th February 2001            
 
                                                  Description          HALO site    

 

                Image by John Kings on Birmingham 
University campus at 12.30 UTC


At top there is an unusually bright and
colourful supralateral arc.  



From the base upwards the 
image shows a faint 22° halo, a bright
upper tangent arc and then possibly a 
faint and rare Parry arc.

 

                Fisheye image by 
Ant Veal and all on 
Birmingham 
University campus 
at 12.35 UTC

Compare this with the 
simulation at the bottom 
of this page.

The display was fading at 
this stage but the parhelic 
circle, supralateral?arc 
and intense upper tangent 
arc remain. 

Further analysis is needed 
to finally decide between
a supralateral arc and 
46° halo, although the 
former seems the most 
likely.


                                  

                Image by Gill Smith taken near 
 Rievaulx Abbey at 13.45UT

At top a 46° halo (also possibly 
a supralateral arc) touches a 
circumzenithal arc.






From the base upwards the 
image shows a faint 22° halo, an 
upper tangent arc and then a 
rare Parry arc.

               Another image 
by Gill Smith 

The circumzenithal
arc (appearing to 
curve upwards in 
the image) touches 
the 46° halo.


    Finally, a simulation using a fisheye view projection.   This includes some very 
    rare halos in addition to those reported.