yup you did
but thats OK you have come to a good place of learning
it has been seen by orbiting satellite photographs over the years that aurora activity at the North and South Poles ( caused by geomagnetic storming)
can often be an almost mirror image of each other.
I used to live in southern New Zealand and from a young age viewed and photographed many aurora
have a look here
for some of my pics
just out of curiosity, where did you get the idea that they only affect the northern hemisphere ?
something you read or heard ?