Magnets at the Core. 2012: Magnetic Pole Reversal Happens All The (Geologic) Time. 2012: Magnetic Pole Reversal Happens All The (Geologic) Time Schematic illustration of Earth's magnetic field.
Credit/Copyright: Peter Reid, The University of Edinburgh› View larger Scientists understand that Earth's magnetic field has flipped its polarity many times over the millennia. Magnetic Storm. Earth's Inconstant Magnetic Field. Earth's Inconstant Magnetic Field Our planet's magnetic field is in a constant state of change, say researchers who are beginning to understand how it behaves and why.
Listen to this story via streaming audio, a downloadable file, or get help. December 29, 2003: Every few years, scientist Larry Newitt of the Geological Survey of Canada goes hunting. Reversal Effects. Reversal Effects Magnetic field reversals The beneficial effects of Earth’s magnetic field for life on this planet include protection from solar radiation and aid in navigation.
Recently it was noticed that the strength of the Earth’s magnetic field has declined by about ten percent over the course of the 160 years that records have been kept.