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More than a half of strong earthquakes in the world are located in shallow depth at the subducting plate boundary in squeezed zones. Owing to the difference in speed between the moving sea plates, the strain energy is accumulated and released cyclically in squeezed zones. Several methods were developed to analyze the medium-and short-term potential of main shocks. These methods can be classified into (1) less data systems using the theory of grey model for earthquake prediction, (2) quasi-periodic systems using earthquake activity analysis, (3) systems of grouped activity using order analysis, and (4) nonlinear systems using back propagation (BP) of neural network for prediction analysis. Based upon these analytic methods, risk maps for the prediction of strong earthquakes can be drawn using the records of strong earthquakes in Taiwan for the past 100 years. These risk maps include (1) a seismic risk map, (2) a loss risk map, (3) a hazard degree map, and (4) a loss degree map. These risk maps make it possible to do a medium-term prediction of main shocks on the 10-year scale.
More than a half of strong earthquakes in the world are located in shallow depth at the subducting plate boundary in squeezed zones. The Owing to the difference in speed between the moving sea plates, the strain energy is accumulated and released cyclically in squeezed zones. These methods can be classified into (1) less data systems using the theory of gray model for earthquake prediction, (2) quasi-periodic systems using earthquake activity analysis, (3) systems of grouped activity using order analysis, and (4) nonlinear systems using back propagation (BP) of neural network for prediction analysis. Based upon these analytic methods, risk maps for the prediction of strong earthquakes can be drawn using the records of strong earthquakes in Taiwan for the past 100 years. These rivals maps include (1) a seismic risk map, (2) a loss risk map, (3) a hazard degree map, and (4) a loss degree map. These ri sk maps make it possible to do a medium-term prediction of main shocks on the 10-year scale.