EMPIRICAL POINT-ELLIPSE MODEL FOR SEISMIC HAZARD ANALYSIS

An empirical point-ellipse model for seismic hazard analysis is systematicly established in this paper. For most of the regions,isoseismals are of somewhat elongated shape. The empirical point-ellipse model can reduce systematic deviation of point-source and fault-rupture models. Concrete method of computation and the program EPEMSHA (Empirical point-ellipse model for seismic hazard analysis) is given in this paper. In the awkward computation of conditional probability P(Ii Ei,m) integration over an area is analyzed; as a result,the pre-sision and speed of calculation are increased.