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Earth?s Magnetic Field is Changing




Anyone watching a compass needle point steadily north might suppose that Earth?s magnetic field is a constant. It?s not. Researchers have long known that changes are afoot.The north magnetic pole routinely moves, as much as 40 km/yr, causing compass needles to drift over time. Moreover, the global magnetic field has weakened 10% since the 19th century.Earth's magnetic field protects us from solar storms and cosmic rays. Less magnetism means more radiation can penetrate our planet?s atmosphere.

Read Full Story: http://news.spaceweather.com/earths-magnetic-field...

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