Geology Reference
In-Depth Information
90
o
6
4
60
o
50 000
2
30
o
40 000
0
0
o
60
o
30
o
90
o
Latitude
Figure 3.2
Variation in intensity, dip and regional gradient for an ideal
dipole aligned along the Earth's spin axis and producing a polar field of
60 000 nT (and an equatorial field of 30 000 nT).
Figure 3.3
Dip (continuous lines, values in degrees) and intensity (dotted
lines, values in thousands of nT) of the Earth's magnetic field. The thickened
continuous line is the magnetic equator.
