一次强烈地震,往往伴随着大量余震,而强余震可使已经遭到破坏的地区受到新的破坏。因此,研究强余震的发生规律,是地震预报的一项内容。 本文用拟合误差寻找周期的方法,根根海城、唐山、龙陵等几次大震序列的资料,探索强余震的震前信息。 A strong earthquake is often accompanied by a large number of aftershocks, which can cause new damage to areas that have already been damaged. Therefore, studying the law of strong aftershocks is an important part of earthquake prediction. In this paper, we use the method of fitting errors to search for cycles, the data of several large earthquakes such as Haines, Tangshan and Longling to explore the pre-earthquake information of strong aftershocks.