Jun 15 2009
More cool stuff about magnetism
HT to Jonathan, more awesome physics-geek stuff about the magnetosphere:
The Earth’s magnetic field remains a charged mystery
Professor Gregory Ryskin from the McCormick School of Engineering and Applied Science at Northwestern University in Illinois, US, has defied the long-standing convention by applying equations from magnetohydrodynamics to our oceans’ salt water (which conducts electricity) and found that the long-term changes (the secular variation) in the Earth’s main magnetic field are possibly induced by our oceans’ circulation.
Amazing how much we don’t know. Stay tuned.
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