淮南、凤台、寿县一带,为历史上安徽省少数几个曾发生过六级以上地震的地区之一。其原因何在?据我们观察,主要是和这一地区的新构造运动较强有关。淮南、凤台、寿县一带,在地质构造单元为淮南复向斜之一部分(图1)。淮南复向斜在新第三纪以后仍在明显活动:两翼(主要是南翼)节奏性抬升,槽部节奏性沉降,同时也使一些老断层复活,一些新断层产生。现将这一地区的新构造运动及其形迹综述如下: Huainan, Fengtai and Shouxian areas are one of the few areas in history that have had more than six earthquakes in Anhui Province. What is the reason? According to our observation, it is mainly related to the neotectonics movement in this area. Huainan, Fengtai, Shouxian area, in the geological structure of the unit is part of the Huainan synclinorium (Figure 1). The Huainan synclinator is still active after the Neogene: the rhythmic elevation of both wings (mainly the south wing) and the rhythmic sinking of the groove, as well as the revival of some old faults and the generation of new faults. Now the neotectonic movement in this area and its traces are summarized as follows: