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根据华北历史地震的重复性和免疫性，认为在唐山周围85km、200年内，对6级地震具有一定的免疫性；在研究了唐山地震序列自身的衰减规律后，认为在今后几十年内强余震的最大活动水平为5级，发生6级以上地震的可能性很小。
According to the repeatability and immunity of historical earthquakes in North China, it is considered that the earthquakes of magnitude 6 have certain immunity within 85km and 200 years around Tangshan. After studying the attenuation law of Tangshan earthquake sequence itself, it is considered that in the next few decades, strong aftershocks The maximum level of activity is 5, the possibility of earthquakes of magnitude 6 or above is very small.