There are similar tectonic characteristics both in fleet and deep parts and similar dynamic environment in the area of Tancheng-Lujiang fault zone in east Anhui and Chuhe fault. There are same basin in fleet structure and mantal abnormality zone in deep structure

which shows a mirror-image relationship between fleet and deep structures

indicating the correlative cause of formation of the structures. Clear periodicity

clustering

migration and correlation appeared in time and space of modern earthquake activities between Tancheng-Lujiang fault zone in east Anhui and Chuhe fault. It appeared that corresponding similar-level earthquakes would occur in Chuhe fault 1

3

years before or after the main earthquakes cluster （M

L

≥3.0） of seismicity episode appearred in Tancheng-Lujiang fault zone in east Anhui.