The SciencesMay 1, 1958
The Earth as a Dynamo
Why is the earth a magnet? The best answer at present is that the slow flow of matter in its fluid core generates electric currents, which in turn set up a magnetic field
Stories by Walter M. Elsasser
The Earth as a Dynamo
Why is the earth a magnet? The best answer at present is that the slow flow of matter in its fluid core generates electric currents, which in turn set up a magnetic field