Quote:
Originally Posted by freebeard
Fixed. ' Interplanetary Magnetic Field' would be in here somewhere:
something official
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1) you'll notice that NASA's graphic, and lines of flux are virtually identical to that of a bar magnet. Hence my comparison.
2) it represents the geomagnetic dipole field.
3) Earth's axial quadrupole has only 4% the strength of the geomagnetic field, so is not prominent.
4) the quadrupole is aligned with the dipole.
5) Earth's octupole is also weak, and of same alignment.
PS you may examine the date of the NASA material to see if it's long in the tooth.