用地震活动性指数A(b)等资料判断图像以后有无主震及震级大小

To decide whether principal earthquake appears after figure and earthquake scale by seismic activity exponent A(b)and other data

用 A(b)指数判断图象以后有无主震,其效果颇好。A(b)指数能将有主震 M_L≥5.0与有主震 M_L≤4.7(或无主震)区别开来。再加地震活动的范围、强度资料的配合,能判断主震的大小。此方法的资料自检准确率陆地达96%,震例检验的准确率也高。这样的判断,对用图象作地震预报有重要的作用。

It is effective to decide whether principal earthquake appears after figure by exponent A(b).The exponent A(b)can distinguish principal earthquake M_L≥5.0 from principalearthquake M_L≤4.7(or no principal earthquake),the principal earthquake size can be alsodetermined with seismic activity region and earthquake intensity data.Accuracy of the dataof this method for land is up to 96% by self-examining,accuracy by seismic examples exami-nation is high too.This method play an important part in seismologic prediction with fig-ures.