Magnetic Profile
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>Magnetic geophysical surveys are carried out to understand magnetic properties of subsurface rocks.  Scientists can interpret variations in measurements of Earth's magnetic field from place to place across the surface of the Earth in terms of corresponding changes in rock magnetism within the subsurface. Geophysicists work with geologists to relate these magnetic changes to known rock types in the area and thus provide constraint on models of the subsurface (for example, geologic cross-sections). A magnetic profile is made up of individual point measurements that are usually displayed as a line graph that indicates changes in the Earth's magnetic field over a horizontal distance.</SPAN></SPAN></P></DIV></DIV></DIV>
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