<P> A map of intensity contours is called an isodynamic chart . As the World Magnetic Model shows , the intensity tends to decrease from the poles to the equator . A minimum intensity occurs in the South Atlantic Anomaly over South America while there are maxima over northern Canada , Siberia , and the coast of Antarctica south of Australia . </P>
<P> A map of intensity contours is called an isodynamic chart . As the World Magnetic Model shows , the intensity tends to decrease from the poles to the equator . A minimum intensity occurs in the South Atlantic Anomaly over South America while there are maxima over northern Canada , Siberia , and the coast of Antarctica south of Australia . </P>
where is the strength of the magnetic field the weakest
where is the strength of the magnetic field the weakest
the South Atlantic Anomaly over South America
the South Atlantic Anomaly over South America