Earth's magnetic field gathers momentum
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From: Sam Wormley on 13 May 2010 15:25 Earth's magnetic field gathers momentum http://physicsworld.com/cws/article/news/42580 "Physicists in France have linked subtle variations in the length of day with conditions in the Earth's core � where the Earth's magnetic field originates. The finding could improve our poor understanding of how the field is generated and why it changes in response to conditions deep within the Earth's interior. "Molten iron flowing in the outer core generates the Earth's geodynamo, leading to a planetary-scale magnetic field. Beyond this, though, geophysicists know very little for certain about the field, such as its strength in the core or why its orientation fluctuates regularly. Researchers do suspect, however, that field variations are strongly linked with changing conditions within the molten core. See: http://physicsworld.com/cws/article/news/42580 _________________ Nature 465, 74-77 (6 May 2010) | doi:10.1038/nature09010; Received 26 January 2010; Accepted 3 March 2010 Fast torsional waves and strong magnetic field within the Earth�s core http://www.nature.com/nature/journal/v465/n7294/full/nature09010.html |