地震活动图像,尤其是小震级、短时间的动态图像的分析,是地震预报中经常使用的重要方法。动态图像的形式很多,其中,地震频度的变化和震中分布的聚、散图像运用更为广泛。这不仅是因为其分析方法相对简便,图像较为直观,更重要的是因为在不少强震前,曾在较大 The analysis of seismic images, especially small magnitudes and short-term moving images, is an important method often used in earthquake prediction. There are many forms of dynamic images. Among them, the variation of seismic frequency and the distribution of polygamy and scattered images in epicenter are more widely used. This is not only because its analysis method is relatively simple, the image is more intuitive, more importantly, because before a lot of strong earthquakes,