Coba jelasin Pautan luar dari Pembalikan geomagnetik dalam bahasa melayu dong

How geomagnetic reversals are related to intensity

"Look down, look up, look out!", The Economist, May 10 2007

"Ships' logs give clues to Earth's magnetic decline", New Scientist, May 11 2006

Simple explanation of geomagnetic reversal, physics.org, accessed Nov 2 2012