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Basics of Magnetism 4: Reversals Part 1

Earth has a magnetic field, which is what keeps your compass lined up with the North Pole [1]. The Earth’s outer core generates that┬ámagnetic field. You may have heard before that Earth’s magnetic field has, in the past, switched its North and South Poles. This is true, and kind of amazing and mysterious, but useful at the same time. This is the first in a series of picture-posts – not quite comics –┬áthat discusses magnetic reversals, and why and how we use them. I owe Maxwell Brown for this one.

A picture of a volcano with a Roman temple on top, and a story about building stones and magnetism

 


[1] Previous relevant posts are under the paleomagnetism tag.

 

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