This is, FTP, the name of what model which explains the cause of the Earth's main magnetic field, named for the type of electric generator the Earth becomes to produce it.
First formulated by Walter Elsasser and Edward Bullard during the mid-1900's, this is the result of conducting materials such as liquid iron in the Earth's core which are induced by the heat of radioactive decay to move across the extant weak magnetic field, producing an electric current. This current in turn produces a magnetic field which interacts with the fluid motion of the conducting material to produce another magnetic field, and the two combine and lie across the axis of the Earth's rotation. This is, FTP, the name of what model which explains the cause of the Earth's main magnetic field, named for the type of electric generator the Earth becomes to produce it.
First formulated by Walter Elsasser and Edward Bullard during the mid-1900's, this is the result of conducting materials such as liquid iron in the Earth's core which are induced by the heat of radioactive decay to move across the extant weak magnetic field, producing an electric current.
Dynamo Effect or geomagnetic dynamo