Method for forecasting an earthquake from precusor signals

摘要

A method for forecasting an earthquake from precursor signals by employing characteristic first electromagnetic signals (12), second, seismically induced electromagnetic signals (14), seismically induced mechanical signals, and infrasonic acoustic signals (16) which have been observed to precede an earthquake. From a first electromagnetic signal, a magnitude, depth beneath the surface of the earth, distance, direction, latitude, longitude, and first and second forecasts of the time of occurrence of the impending earthquake may be derived (18). From a second, seismically induced electromagnetic signal and the mechanical signal, third and fourth forecasts of the time of occurrence of an impeding earthquake determined from the analysis above, a magnitude, depth beneath the surface of the earth and fourth and fifth forecasts of the time of occurrence of the impending earthquake may be derived (22). The forecasts of time available from the above analyses range from up to five weeks to substantially within one hour in advance of the earthquake.