[WayneS]

How can they be sure the magnetic field is not causing the ocean currents?

;-)

[DUMBGRUNT]

The fields described is incredibly weak.

Over the surface of the earth may not add up to much.

"A refrigerator magnet is 100 gauss, a strong refrigerator magnet. The typical strength of the Earth's magnetic field at its surface is around a half a gauss. So those are everyday units of magnetic fields. There are 10,000 gauss in one tesla."

" about 20,000 times weaker than the Earth’s global magnetic field.”"

"A nanotesla is equivalent to one gamma, a unit originally defined as 10−5 gauss, which is the unit of magnetic field in the centimetre-gram-second system."

They may simply be viewing 'EMI' from my magnet collection?