The chaotic source of our magnetic field
There has been increased attention on the Earth’s magnetic field in recent years. Scientists have noticed for some time that this protective barrier, which shields the planet from being roasted by cosmic radiation, is less reliable than we might hope. The field itself is generated by iron and other metals circulating deep in the Earth’s core. A doctor friend once described the beating heart as a chaotic, thrashing movement far removed from the peaceful thumps we take it to be. The planet’s core is similar. Iron and other metals are constantly moving as the intense heat and pressure at those depths work them like dough. As these metals move differently, the magnetic fields that they emit change accordingly. This can lead to weak spots in the field….
If you are interested in reading the rest of this story, it can be found in our new book, A Guide to the Wonderful World Around Us: Notes on Nature. Please click here to visit Amazon.com to learn more about purchasing this book.
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