Is there a strong magnet inside the earth responsibility for earth's magnetism? If there is a magnet, what is its inclination w.r.t. to north-south direction?

Explanation

Actually there is no permanent strong magnet inside the earth responsible for earth's magnetism. However to explain the earth's magnetism, Dr. Gilbert considered a fictitious strong magnet inside the earth, whose magnetic axis is inclined roughly `11*3^@` west of axis of rotation of earth, which is along geographic north and geographic south.