would this be a sign on the Apostraphe? '
Next time Earth's magnetic field flips, compass needles will point South instead of North. But scientists can't say when it will occur, and until now they've disagreed on how long the transitions take.
Earth's magnetic field is thought to be generated deep inside the planet. An inner core of solid iron is surrounded by an outer core of molten iron. They rotate at different rates, and the interaction between the regions creates what scientists call a "hydromagnetic dynamo." It's something like an electric motor, and it generates a magnetic field akin to a giant bar magnet.
The process is not completely understood. In fact, one study suggests the planet's mantle, which surrounds the core, also plays a role.
Yet the intensity of the magnetic field has been dropping for the last 2,000 years, and "it has dropped significantly" during the past two decades.
2007-09-12
10:10:29
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6 answers
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Anonymous
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Religion & Spirituality