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Unformatted text preview: points to the geomagnetic north. However, since opposite poles attract, the north pole of the magnetic needle in the compass must point toward the south pole of the Earth's magnetic field. The Earth's surface magnetic field has a strength and a direction. The sites of the magnetic poles are the locations where the magnetic field lines are completely vertical. Maps with the locations of the magnetic poles are given above. At these locations, harmful radiation from the sun more easily penetrates to the Earth's middle and lower atmospheric layers....
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This document was uploaded on 09/16/2011.
- Spring '09