This image demonstrates the right hand rule law, the thumb represents the direction of the moving current the blue circles represent the direction of force exerted by the magnetic field;
The curl of the fingers show you the direction of magnetic force, while the thumb shows the direction of current flow.
In the case of an earthquake the size of the quake is a result of the built up geologic pressure from previous magnetic force events, and finally the size of the magnetic force event that triggers the release of pressure, in conjunction with its own.
In the next posting I will explain what is causing the periodic electric discharges creating the magnetic force.
