關鍵詞：最強地震圓弧雙交叉 ;Abstract We study the efficiency of the strong earthquake prediction made by using the strongest double intersection of circular arcs of earthquakes (SDICAE) proposed by H.C. Lei. The MATLAB program ASICAE is applied to search for SDICAEs in the earthquake catalog obtained from the Central Weather Bureau of Taiwan. The longitudes of the events to form the SDICAEs are ranged from 118.5°E to 123.5°E while the latitudes are ranged from 21°N to 25.5°N. The magnitudes of the events are required to be greater than or equal to 4.99, and the depth of them are smaller than 70 km. We search for the SDICAEs formed by events occurred in 36 months, and use the SDICAEs to predict strong earthquakes with magnitude greater than or equal to 5.7 and depth smaller than 70 km. We try to find out the parameter setting which give us the best efficiency of the strong earthquake prediction. We also try to improve the prediction efficiency by cancelling out some SDICAEs with some special criteria.
Key words：the strongest double intersection of circular arcs of earthquakes
