>>12970669the most plausible model is that there is a molten metallic core this would be a remnant from the hot early terra ("liquefacta est terra"...) , very hot metals give electrons off, the whole liquid core is rotating and those free electrons are moving, so there's a current and a corresponding magnetic field (this current should be moving in the equatorial plane)
that's the basic concept but no one knows for sure
liquefacta est terra et omnes qui habitant in ea, Ego confirmavi columnas eius
liquified....is earth and...all....that inhabits in her, I confirmed the columns of theirs.