I need help understanding a certain problem. It basically stated: an airplane accumulated a positive charge, heading westward above the equator. Find the direction of the force (using the lame right hand rule thing). The problem I had was figuring out was whether the magnetic field would hit the plane at the top or bottom. I know the magnetic field lines go from earths's south geographic to north geographic poles. My answer was that the force would be outwards from the plane of the paper, but the correct answer was inwards. The trouble I had was visualizing earth as a magnet. I know no field lines go through a magnet, so if the fields originate at the poles, in what direction do they go when it's something above the equator...do they circle the earth and then dip back down towards the south geographies pole, or go directly from the south to north geographies poles?