One last sermon before I go to bed.<quoted text>
Max Planck told me to inform you that it's time to abut your positive end to the negative end of your bottom sheet.
Or you may end up hating yourself in the morning.
About magnetic energy.
I think it is something like only 10% of the total magnetic strength of a magnet escapes the surface. The rest flows through the material of the magnet.
The assumed dynamo for the earth;s field is down near the outer core. Somewhere around 1000 miles. The field it generates goes out far enough so that when the solar wind blows the magneto tail, it sometimes slaps the moon, inducing a heavy static charge on its surface. It also captures high speed charged particles from space.
This is not a weak force.
They take the reading from the surface of the earth, which they say is very small. Of course it would be, because the crust is a secondary magnet. You are reading it. The flux originates way below it and keeps going, magnetizing material in the crust, in addition to tidal forces and cosmic magnetic fields inducing magnetic fields in that same crust. This is that rock thing experiment no one wants to try.
The heliosphere and the galactic magnetic field are two of those cosmic fields. Then you have those nice iron cores of the earth. So you have the mix of magnetic fields interacting on the surface. Wrapping and twisting in mostly a regular pattern. You are part of that pattern. Caught in it, and affecting it. Be advised that thought is EM.
It gets more complicated, but I am going to bed.