Natural open air wild hives on the outside of limbs will normally will build
north and south with the comb.  If they build east to west the trend to make
bural comb.  The hives seem to be building shade from light (the virbaration
or heat) and nothing to do with the magnetic flux.  The secruity for the
brood is number one with protection by the honey comb around it.  Hive frames
can build bural if they can be moved, to much light comming in enterance,
and/or the lid does not block out light.  Michael Housel