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Shields down! Earth's magnetic field may drop in a flash and do a flip flop

EVEN if we knew precise details of Earth's core, we would not be able to predict a catastrophic flip in the polarity of its magnetic field more than a decade or two ahead.

Our planet's magnetic field has reversed polarity from time to time throughout its history. Some models suggest that a flip would be completed in a year or two, but if, as others predict, it lasted decades or longer we would be left exposed to space radiation. This could short-circuit satellites, pose a risk to aircraft passengers and play havoc with electrical equipment on the ground.

To test whether we would see a flip coming, Gauthier Hulot of Denis Diderot University in Paris, France, and colleagues ran computer simulations of Earth's magnetic dynamo based on a range of plausible values for inputs such as the viscosity, electrical and thermal conductivity of the outer core, and the temperature difference acro



Added: Mar-7-2010 Occurred On: Mar-7-2010
By: neverknwo
In:
Arts and Entertainment
Tags: HAARP, Pole, Shift, Axis, Earthquake, Sunspots, Solar, Flares, Magnetic, Field, Shifting, Ocean, Jet, Stream, Currents, Extreme, Global, Changing, Weather, Earthquakes, Volcanic, Eruption, s Human, Disruption, 2012
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