Although most observers prefer to marvel at the spectacular curtains and drapes of an aurora from lower-latitude locations, it has been known for over 100 years that inside
the polar auroral oval, there are also a variety of interesting phenomena to watch for. One of these, and rather rate at that, is the theta aurora. From space, the auroral oval sports a
band of light parallel to lines of longitude, which ties opposite
parts of the oval together into the greek letter Theta. It has
also been known for decades that the north and south pole auroras
are very similar during a storm event; a phenomenon called Conjugacy.
The IMAGE FUV instrument studies the theta aurora formed during November 5, 2001
and April 18, 2001 and discovered that these theta aurora did not have partners on the other pole!
(2003: Ostgaard et al.)