Originally Posted by
2dPilot
Quite a few items may be affected to some degree by the reduced magnetic field strength. Many phones & tablets for example when using navigation type apps can already get confused by weak/distorted fields (as inside a car).
Incorrect. These gadgets rely on a GPS satelite signal (which may get blocked inside a car / building) and have nothing to to with Earth's magnetic field. Other than magnetic compasses (and systems that rely on a derived magnetic compass signal, but these are all adjustable to allow for a changing deviation), there is nothing we use today that is affected.