Characteristics of crust vertical deformation and seismic risk analysis in Liaoning area

Based on the three-issue repeated measurement data of the Liaoning area, we calculate the vertical strain rate during 1988-1998 and 1998-2016, and draw the corresponding vector graph and isoline map of the vertical deformation rate. The correlation between vertical deformation characteristics and seismic activities is analyzed combining the geological background and tectonic activity in Liaoning area, thus to identify the overall trend of deformation and to require critical attention to the areas. The results showed that Liaoning region represents as inheritance movement, Liaodong and Liaoxi uplifts exhibit an upward trend, Liaohe down-faulted zone showed subsidence for a long time after M_S7.3 Haicheng earthquake; the overall amount of difference of deformation in Liao-ning area decreased since 1998, the region's vertical deformation tends to be stable. The high gradient zone of deformation rate is still concentrated in the border of Liaohe down-faulted zone, Liaodong and Liaoxi area, and then these areas exist high potential risk and need sustained and focused attention.