Friday, 10 November 2017

Geomagnetic spike

What does a 3,000 year old "Geomagnetic Spike" tell us?

Studies of ancient slag heaps show that the magnetic field varied in strength by 100% over a 30 year period. But only in a small area centred on Jordan.

Strength of Earth's magnetic field in 2010 (left) and 1000BCE (right)

This article discusses this and speculates about what was happening in the core and whether it could happen again and the likely consequences. 

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