Editor's note: See how the earth's weakening magnetic field and solar radiation impact climate change and natural disasters in this piece: WARNING: The Coming Solar StormRapid changes in the churning movement of Earth's liquid outer core are weakening the magnetic field in some regions of the planet's surface, a new study says.
"What is so surprising is that rapid, almost sudden, changes take place in the Earth's magnetic field," said study co-author Nils Olsen, a geophysicist at the Danish National Space Center in Copenhagen.
Tuesday, July 1, 2008
Earth's Core, Magnetic Field Changing Fast
Kimberly Johnsonfor National Geographic News
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