Geoeiectromagnetic signals related to earthquakes have been detected in China and many other countries.Problems concerning the mechanism of the electromagnetic emission and transportation still remain unsolved,although several models have been proposed.We consider that the theory of "electromagnetic missile emission" may be used to solve this problem,and thus develops the basic ideal of the Electro Magnetic Missile Emission(EMME)model of the emission of electromagnetic signals before earthquakes:pulse variation of the stress state causes the emission of electrons,or sudden flow of the fluid,in a certain direction along or near the fault which is located at the focus of an earthquake,forming a pulse electric current; this current accordingly produces a kind of slowly attenuated EM Wave(electromagnetic missile,which may be observed on the surface of the earth)in the perpendicular direction.In other directions these EM waves vanish quickly and cannot reach ground level.
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