What season is it in Quebec Canada on September 30?

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.