Method and apparatus for detecting electromagnetic waves generated by the earth's crust under strain

摘要

An antenna element such as a monopole, dipole or loop antenna is located in the earth or on the floor of the sea so as to receive pre- earthquake electromagnetic waves generated prior to the occurrence of an earthquake. Unwanted noise waves propagating in the air such as man-made noise are effectively eliminated by a reflector laid on the surface of the earth or by the sea water and only the required pre-earthquake waves are detected by the antenna element, whereby earthquakes can be predicted reliably.