It’s those little electric motors in EVs. Electric motors have magnetic fields. The effects of ALL of those electric magnetic fields have reversed the earth’s magnetic field.
Time to park EVs.
You may be correct.
We had a FIAT X1/9 back in the mid 80’s.
The battery was in the front and engine in the rear. So there was a long battery cable running under the body tunnel to the starter.
We had a floating ball compass on the dashboard, and every time we started the car the ball would rotate to align with the battery cable instead of the North/South axis.........................