What is the relationship between seismic gaps and earthquakes? a a seismic gap is the area where an earthquake originates b a seismic gap is an area along a fault where few earthquakes have occurred recently but strong ones have occurred in the past. c a seismic gap is an area where numberous, close faults create earthquakes d a seismic gap occurs because the interior of earth is not uniform and waves travel through earth's core at different speeds