[bert]

That is plausible. The hard part for me is how does the stress induced electromagnetism penetrate miles of crust?

[UCANSEE2]

The hard part for me is how does the stress induced electromagnetism penetrate miles of crust?

I would think it's the same way that the magnetic field generated at the Earth's core penetrates thousands of miles of magma and crust and reaches way out into space. The difference is in the scale.