Earth and Plenatary Dynamos


The Earth has its intrinsic magnetic field, but its origin is not easily explained..... It is considered that the Earth's magnetic field is generated and maintained by a dynamo action in the Earth's outer core; that is, fluid motions in the highly electrically conducting core induce an electromotive force from an inducing magnetic field. The electromotive force creates electrical currents, which generate a magnetic field. If thus induced magnetic field is the inducing magnetic field it self, the magnetic field will be maintained!! In other words, kinetic energy is converted into magnetic energy by a DYNAMO action. My study is to clarify this mechanism on GEODYNAMO. This problem is considered to be one of magnetohydrodynamics (MHD).
Back
Masaki Matsushima

August 19, 2005